محمدحسین پل

In this research, energy absorption in sandwich panel structures with honeycomb core and skin made of glass-epoxy multi-layer composite, aluminum, and two-dimensional glass fabrics impregnated with shear-thickening fluid under low-velocity impact loading has been investigated. Polyethylene glycol 400 and hydrophilic fumed silica with nanometer dimensions were used to make the shear thickening fluid, and then a rheometer was used to verify the rheological properties of the fluid. The test was carried out at two heights of 100 and 500 mm with a drop weight device. The sandwich panel honeycomb core has been tested once filled with shear thickening fluid and again empty of shear thickening fluid. The results of the rheology test show that the viscosity value increases with the increase of the shear rate. The impact test results show an increase in energy absorption in the structure of sandwich panels filled with shear thickening fluid compared to empty sandwich panels. At the drop height of 500 mm, the absorption of specific energy in the sandwich panel structure with a skin made of two-dimensional glass fabrics impregnated with shear thickening fluid, the ratio of sandwich panel with a skin made of aluminum and composite increased by 27.93, and 9.47%, respectively, and energy absorption in The sandwich panel with composite skin has increased by 16.86% compared to the sandwich panel with aluminum skin.

Man always tries to get inspiration from nature and create new structures. One of these new structures is cellular and lattice structures, which have attracted the attention of researchers due to their low weight and appropriate compressive strength. In this article, inspired by nature and the structures in it, these structures have been investigated and modeled on creatures such as turtles, snails and sea shells. For this purpose, two models of each pattern were designed and made of Petg material using the additive method. The samples were subjected to the test of two consecutive impacts with the impact weight of 2.2 Kg and at two heights of 5 cm and 10 cm. The results showed that the highest and the lowest impact force at a height of 5cm respectively correspond to one of the samples taken from a turtle and one of the samples taken from a snail with a ratio of 325% and at a height of 10 cm, respectively, it corresponds to one of the turtle samples and snail samples, with a ratio of 200%. The highest and lowest displacement in the maximum force resulting from the impact is at a height of 5 cm, respectively, related to one sample taken from a snail and a turtle with a ratio of 252%, and at a height of 10 cm, respectively, it corresponds to one of the snail samples and turtle samples, with a ratio of 238%

Metal orthopedic plaques can cause problems such as osteoporosis in the area under the plaque, the release of unwanted corrosion products in the body due to the wear of metal plaque and as a result of infection, as well as surgery to remove the hard metal plaque. Therefore, polymer plaques and composite plaques can be a good substitute for metal plaques. In the current research, the effect of polymeric material type on the mechanical properties of two bone stabilizing plaques, one flat and the other curved, both with a row of holes and high clinical application, is investigated using the three-point bending test. For this purpose, samples were made of ABS, PLA and PETG using additive manufacturing method of 3D printing and FDM melt deposition method. The test results showed that the highest strength and flexural modulus for both models of orthopedic plaque samples is related to PLA material. For the flat plaque, the bending strength and bending modulus of PLA compared to PETG are 58% and 100% higher, respectively. For the curved plaque, the bending strength and bending modulus of PLA compared to PETG are 49% and 100% higher, respectively. It was also seen that although the strength and flexural modulus depend on the dimensions and geometry of the models, but the ratio of changes in these properties, especially the flexural modulus, is almost constant.

The addition of nanoparticles to the multilayer sheets improves the properties and performance of these laminates. In this research, the deformation process in metal-nanocomposite laminates including polypropylene matrix reinforced with nanoclay and glass fibers as core layer and annealed aluminum 1050A as the skin layer has been investigated using experimental method. In this regard, the effect of different weight percentages of nanoclay relative to the base phase, including 1, 3, 5 and 7 wt% on the values of drawing depth and maximum drawing force in the stamping process has been measured. In order to determine the effects of adding nanoclay particles, the results of deformation of metal/nanocomposite laminates are compared with metal/composite laminate including pure polypropylene reinforced with glass fibers. The results show the ability to perform stamping process of metal/nanocomposite laminates. It was observed that in general, with the addition of different percentages of nanoclay particles, drawing parameters including the maximum drawing force and the drawing depth have changed. Also, the failure mechanisms in all samples are crack growth in layers and delamination of layers. Addition of nanoclay particles has no effect on the principle of failure mechanism in the stamping process of metal/composite laminates and only affects the values of the process parameters.

In this paper, the specific absorbed energy (SAE) and mechanical properties of aluminum foam sandwich panels with composite surfaces under quasi-static loading were studied experimentally. The core of the samples are aluminum foam blocks with thicknesses of 1 cm, 2 cm and 3 cm. 2D-woven E-type glass fibers with surface density of 200 Kg/m2 and epoxy resin were used for fabrication of the surfaces. From adhesion of resin was used for bonding to the core and surface. the effect of changing the thickness and density of the core, the composite surface, the surface on one side of the core, the multilayered core having an equivalent thickness, the effect of changing the density of the aluminum foam core is studied and SAE values of the samples were compared. The results showed that increasing thickness of the aluminum foam from 2 cm to 3 cm increased the SAE between 12% and 26%. The use of composite surface reduces the amount of SAE. The multilayer core increased the SAE in the linear elastic zone and at the other force levels decreased the maximum of 6% of the SAE. Moreover, increasing the core density increased the degradation force and reduced the amount of displacement.

There is possibility of impact loading on composite tubes while they are being placed or operated. Impact loads can be caused by the objects falls and they are able to make considerable internal damages that decrease residual resistance of layers in composite tubes. In the present study, effective parameters such as tube thickness, impact energy and inner diameter on single-wall tubes behavior under impacting and its consequent damages have been studied numerically, using LS-dyna software. Therefore, composite tubes have been modeled using 3D Solid 164 element and CODAM material model and they have been impact loaded with low velocity. In order to validate the numerical results and modeling, some of the numerical results have been compared with experimental data. An experimental sample of F205 hardener, Epon 828 resin and 400 g/m2 glass fiber was used to make the test sample. There is a reasonable good agreement between experimental and numerical results. Result discussion showed that there are no changes in diagram slope with increase in inner diameter. In other words sample strength and its resistance to impact are increased with growing in inner diameter. Furthermore, mean force level of force-displacement diagram goes up with increase in number of layers in composite sample structure which indicates an increase in sample resistance to impact.

Composite tubes may be subjected to quasi-static loads during placement or operation. By determining the impact properties of composite tubes and using them in the design process, the accuracy of the behavior of these structures in a quasi-static loading condition is guaranteed. In the present study, the effect of changing parameters such as pipe diameter, fiber density, fiber alignment angle and the addition of foam on the behavior of glass/epoxy composite tubes under axial loading has been investigated. The force-displacement diagram was extracted for all experiments and compared with other experiments. Also, the specific energy absorption in each experiment was calculated for all samples. The results of this study showed that the change of parameters mentioned on the energy absorption of composite tubes is effective. As the sample's internal diameter and the density of the fibers used to make the sample increases, the specific absorbed energy also increases. Also, the results showed that with increasing foam density up to1400 Kg⁄m^3 , the sample resistance was increased against the loading and the specific energy absorption was increased. From the present study, it was also clear that for samples with fiber density of 400 g/m2 and angle of alignment [±45], the clustering mode was folding with a special pattern, similar to the destruction of metal samples reported by other researchers.

In this paper, the energy absorption and delamination damage in thin composite plates reinforced with nanoparticles under ballistic impact are investigated analytically. During perforation process in the nanocomposite plates considered different regions such as: fracture region, elastic deformation region, delamination region. Mechanical properties like tensile modulus, fracture strain, shear modulus, strain energy release rate specification of projectile and target were used as input to the analytical model. Then, by using of analytical relations and input data are achieved the deflection, strains and tensions around the impact point of the target. Also the amount of energy absorbed by different failure modes and the kinetic energy variation of projectile and target at small time intervals, the radius and energy of the delamination and residual velocity of the projectile is estimated. Finally, the results of analytical models on the nanocomposite plates compared with experimental results under ballistic impact and a good agreement was found. According to the results obtained the effect of nanoparticles on the improved mechanical properties of composite materials and also investigation of various failure modes is discussed.

Composite tubes may be subjected to impact loads during placement or operation. By determining the impact properties of composite tubes and using them in the design process, the accuracy of the behavior of these structures in the loading condition is guaranteed. In this study, the behavior of glass/epoxy composite tubes under dynamic axial loading was experimentally investigated. Also, the effects of parameters such as fiber density, fiber alignment angle, internal diameter of the tube and impact energy on the amount of pipe damage were also studied. To prepare composite specimens, E-type glass fiber was used with two different densities of 200 gr⁄m^2 and 400 gr⁄m^2 . The specimens were placed on a drop weight machine of Tafresh University by a fixture, and the Impactor was released from the height of 2 meters. The force -displacement diagrams for each test were extracted and compared with each other. Also, a parameter called specific energy absorption was calculated for all samples in order to compare the efficiency of the samples as energy absorber. The results of this study showed that increasing the fiber density, number of layers and diameter of the tube increases the specific energy absorption. It was also observed that with the increase of the axial dynamic impact energy, the mechanical properties of the specimen will be changed and the specimen will be firmly established.

In this research, nanocellulose fibers were used as adhesive filler in the manufacture of plywood from wych elm (Ulmus globra). Then, the drop-weight impact of the plywood samples was investigated. For this purpose, the nanocellulose fibers were added to dry weight of urea formaldehyde adhesive at four levels of 0, 0.5, 1 and 1.5%. The "4-ply" plywoods were made with these adhesives that the layers in top and bottom were parallel and had two core layers perpendicular with top. In order to investigate the impact properties, plywood samples were tested in the drop-weight impact device. The maximum force on the samples, the displacement in maximum force, the energy consumed in the maximum force and the total absorbed energy were evaluated. The results showed that the sample containing 0.5% of the nanocellulose fibers had the best impact property and with increasing nanocellulose fibers, the impact properties were significantly reduced. Also, the impact resistances in the most of samples with nanocellulose fibers were better than the without nanocellulose (control) samples.

In this paper, a 2D analytical model is introduced for predicting the ballistic behavior of the thin laminated composite plate based on tsai-hill and maximum strain criterions. At first, try to determine the moment deformation along with the expansion of transverse wave from impact point and the nonlinear strains and stresses in the composite plate. Then, the energy absorbed due to failure modes and deflection of composite plate such as elastic deformation energy, longitudinal and lateral fracture energy, kinetic energy of local movement, delamination and matrix cracking energy is calculated. For investigation of the various failed layers is used of tsai-hill and maximum strain criterions. In addition to the effects of strain rate on the mechanical properties of the composite layers is applied momentarily during Penetration process. Finally, the present analytical model based on tsai-hill and maximum strain criterions is compared with experimental results. The maximum strain criterion respect to tsai-hill criterion has shown a good agreement with experimental results in the calculation of ballistic limit velocity. According to the obtained results the share of fracture energy compared to the elastic deformation energy by increasing the thickness becomes more and more. And also, the kinetic energy of the local movement, delamination and matrix cracking energy have lower share in the process of energy absorption.

Nanoparticles are being used nowadays to improve the mechanical and structural specification of Fiber Reinforced polymers (FRPs) due to production of hybrid & Multi scale composites. Electrophoretic deposition has been utilized to deposit a smooth layer of carbon nanoparticles on the surface of woven glass fibers, and later in the fiber/matrix interface of composite structure. Initially, the experimental parameters in deposition of CNTs investigated. Suspension concentration, field strength and process duration effects has been studied on the quality and quantity of deposition mass. Then the best situation has been used to fabricate CNT reinforced glass fiber-epoxy composite to evaluate its short beam strength and also quasi static indentation performance subject to lateral shear loads. Results demonstrates the salient effect of grafted CNTs in the nanocomposites interface on their mechanical behavior. The interlaminar shear strength of prepared nanocomposites has been increased by 42% regarding control samples and 10% improvement achieved in their quasi static performance. It has been shown that there is a range of optimum values for field and concentration due to stability of process and also deposition mass. The stability of process will restrain the field and concentration in the process. In best practices the current density values encountered between 0.5 and 1 mA/Cm2. The effect of field strength was around 8.5 times, but the effect of concentration was around 5.5 times. The current density diagram was steady in stable processes and the first three minutes of each process known as the effective deposition time.

Nowadays, using composite materials has been grown increasingly especially in aerospace and automobile manufacturing. Composite drilling is the main machining process for assembling the composite components. The damages caused by drilling process, such as delamination, fiber breakage, fiber pull out and matrix cracking around the hole can decrease the residual strength of drilled components. In this paper, the effect of drilling parameters such as feed rate, spindle speed and drill diameter on the thrust force, delamination for composite specimens with different percentages of nano fibers are discussed. Taguchi method is used for Designing of Experiment to analysis effect of machining parameters (feed rate, spindle speed, drill diameter) and percentage of nano particles on the thrust force and delamination factor. The results show that by increasing carbon nano tube up to a special percentage (about 5%) delamination and thrust force decrease. Also, by decreasing feed rate and increasing spindle speed, thrust force and delamination factor decrease

In this paper, the effects of the adding of carbon nanotubes on quasi-static punch shear behavior of glass/epoxy laminated composites under penetration of three different indenters has been investigated experimentally. The hybrid laminate nanocomposites have 12 layers is manufactured by Hand lay-up method. Fibers have a plain-weave configuration with density of 200 g/m2, while the epoxy resin system is made of diglycidyl ether of bisphenol A resin (DGEBA), Epon 828, with Epikure F-205 as the curing agent. The multi-walled carbon nanotubes (MWCNTs) modified with hydroxide (-COOH) are dispersed into the epoxy system in a 0% and 1% ratio in weight with respect to the matrix. In order to study of influence of the nose shape, three different indenters, flat, conical and ogival, were used. Moreover, the tensile test was performed on the nanomatrix and the hybrid laminate nanocomposite samples. The tensile test indicated that the addition of nanotubes on the tensile properties of resin were seen a significant increase, but no significant changes were observed in the tensile properties of the hybrid laminate nanocomposites. Results of the quasi-static punch shear test show that the highest contact force is exhibited by flat indenter, while the highest absorbed energy is shown by conical indenter. Totally, the adding of carbon nanotubes reduces the contact force and absorbed energy.

In this research, the influence of adding carbon nanotubes on the tensile and the mode I interlaminar fracture of glass-fiber-epoxy laminated composite has been experimentally studied. For this purpose, the hybrid glass-fiber-epoxy-nanotube laminated composites which have 18 fiber-glass plain-weave layers were manufactured by hand lay-up method. The epoxy resin system is made of Epon828 resin with Epikure F205 as the curing agent. The multi-walled carbon nanotube (MWCNTs) modified with hydroxide (-COOH) is also dispersed into the epoxy system as a reinforcement in a 0%, 0.1%, 0.5% and 1% ratio in weight with respect to the matrix. In addition, the tensile nano-resin and hybrid nano-composite specimen were produced. The results of the tensile test of nano-matrixes indicate that the maximum change in Young's modulus, ultimate strength and fracture toughness of the samples is in the 0.5% sample, with a 31.2%, 21.4% and 16.66% increase with respect to neat sample, respectively. Moreover, the results of the tensile test of hybrid nano-composites indicate that the maximum change in fracture toughness, ultimate strength and fracture strain and of the samples is in the 0.5% sample, with a 12.6%, 9.8% and 12.6% increase with respect to neat sample, respectively. The result of the mode I interlaminar fracture toughness test of hybrid nano-composites show that the maximum change in value of the force (in force-displacement diagram) and value of the energy (of crack propagation in mode I interlaminar fracture), is in 0.5% sample, with a 24.4% and 24.15% increase respect to neat sample, respectively.

In this paper, the effective diameter of the punch and the speed of loading and geometry penetrating properties of quasi-static punching (QS-PS) laminate composites has been studied experimentally. The composites have 12 layers of 2D woven glass fiber with area density of 200 g/m2, is manufactured by Hand lay-up method. Epoxy resin systems is made of a diglycidyl ether of bisphenol A (DGEBA), Epon 828, as the epoxy prepolymer and Epikure F-205 as the curing agent. In this study, of two ratio of span 5 and 10 and three strain rate 5, 250 and 500 mm / min as well as three indenters with flat, conical and ogival used. The results of investigation ratio of span show that with decrease half size in the ratio of span, deform the target page lower and contact force 20% increases. Results punching shear at different strain rates shows that with increasing strain rate, composite strength increases. In comparing the results of indenter with different geometries indicate that the flat indenter has higher contact force and maximum of the absorbed energy is by the cone indenter.

In this research, effect of adding silica nano-particles on the mode II interlaminar fracture toughness of epoxy matrix composites reinforced with glass fibers was experimentally studied. Hand lay-up method has been used to manufacture nanocomposites with18 layers of 2D woven glass fibers with 40% fiber volume fraction. The nano-epoxy resin system is made of diglycidyl ether of bisphenol A (epon 828) resin with jeffamine D400 as the curing agent. Nanosilica particles are dispersed with 0, 0.5, 1 and 3 wt.% (of epoxy resin) to study the effect of nanosilica content on fracture toughness. Also a series of nanocomposites with 1 wt.% nanosilica content and contained 55 vol.% glass fibers were fabricated to investigate the effect of fiber volume fraction on results. End notch flexure (ENF) test was adopted for the measurement of mode II interlaminar fracture toughness.The results show that high loading of nanosilica has no significant effect on the interlaminar fracture toughness of nanocomposites while the addition of 0.5 wt% nanosilica enhanced the interlaminar fracture toughness about 36% compared to the neat composites. Decreasing fiber volume fraction improved interlaminar fracture energy.

The current study represents the influence of nanoclay on buckling behavior of glass fiber reinforced polymer (GFRP) grid-stiffened nanocomposite shells. The nanocomposite grid shells were manufactured from continuous glass fiber using a specially designed filament winding machine. The epoxy/clay nanocomposites with different clay content (0%, 1.5%, 3% and 5% of clay) were used as the matrix of the grid stiffened structures. The state of dispersion and mechanical properties of the epoxy/clay nanocomposites were obtained by X-ray diffraction (XRD) method and uniaxial tensile test, respectively and also the grid structures were loaded under uniform axial compression test. The results of XRD show that the clay has been further intercalated by the epoxy matrix. The tensile test results represent that the tensile modulus and Strength, strain to break and energy to break of the epoxy/clay nanocomposites increase with adding clay loading into the epoxy resin. Furthermore, it is found that the critical buckling load of the cylindrical grid samples increases continuously with increasing the clay content up to 5 wt. %. The maximum value of improvement in the critical buckling load is about 10% for the samples with 5 wt. % of nanoclay.

In this study, the numerical and experimental study of energy absorption and deformation of thinwalled tubes with square geometry and circular cross under impact loading is studied. The purpose of this study was to investigate the effect of geometry on the energy absorption of aluminum tubes and the effect of foam filled tubes to absorb more energy under transverse impact. In the experimental part, the tubes of aluminum in form of hollow and filled with solid polyurethane foam prepared and then the quasi-static tests with static and dynamic loading rates by drop hammer have been performed on samples with different energy and the acceleration-time diagrams in each test is obtained. In the last part of this study simulation of the phenomenon of transverse impact on thin sections was carried out with the ABAQUS software. The discussion and conclusions of this study, the results of experimental tests carried out by the author of the thesis has been compared with the results of numerical analysis show a good agreement(difference below twenty percent). Finally, it was concluded that with regard to material of structure, at high energies square tubes have 50 percent specific energy absorbed higher than circular tubes and filled tubes have 20 percent specific energy absorbed higher than hollowones. And transverse displacement of the hollow tube and circular tube is always higher than the filled tube and square tube.

This paper, experimentally evaluates the effects of indenter geometry on quasi-static perforation process of laminated woven glass epoxy composites. Low loading rate tests were performed, using six indenters with blunt, hemispherical, conical (cone angle of 37˚ and 90˚) and ogival (caliber radius head of 1.5 and 2.5) nose shapes. Composite behaviors like energy absorption, contact force, failure mechanisms and friction force were investigated for different indenter shapes. Hand lay-up method has been used to manufacture composite targets with 18 layers of 2D woven glass fibers of 45% fiber volume fraction. The epoxy system is made of epon 828 resin with jeffamine D400 as the curing agent. The results show that the load displacement curve is divided to five areas. Some of these areas may have higher or lower magnitude, depending on indenter nose shape. The highest contact force is exhibited by unsharpened indenter. The lowest contact force and so the best performance is seen in ogival (CRH=2.5) indenter. Comparing absorbed energies shows that for an identical dent depth, the amount of absorbed energy is major for unsharpened indenters. The 37˚ conical indenter needs the highest energy for perforation, which is 2.6 times more than blunt indenter’s.

In this paper, the tensile properties of 2D woven glass epoxy composite reinforced by two different nanoparticles have been investigated and compared. Hand lay-up method has been used to manufacture nanocomposites with 12 layers of 2D woven glass fibers with 40% fiber volume fraction. The nano-epoxy resin system is made of epon 828 resin with jeffamine D400 as the curing agent. The composites were reinforced by adding organically modified montmorillonite nanoclay (Closite 30B) and nanosilica (SiO2) particles. The nanoclay particles were dispersed into the epoxy system in a 0%, 3%, 5%, 7% and 10% ratio in weight with respect to the matrix, while the spherical nanosilica particles were dispersed into the epoxy system in a 0%, 0.5%, 1% and 3% ratio in weight with respect to the matrix. The results show that low loading of nanoclay decreases the mechanical properties of nanocomposite, while significant improvements of nanocomposite mechanical properties are shown in low loading of nanosilica. Tensile strength and toughness of nanocomposite increase by 7% and 10% after adding 5 wt.% nanoclay. Loading of 0.5 wt.% nanosilica cause 10% and 27% improvement in tensile strength and toughness of nanocomposite.

In this study, experimental tests were performed to evaluate the effects of axisymmetric cylindrical projectile nose shapes and initial velocities on ballistic performance of laminated woven glass epoxy composites. Projectile initial velocity and nose sharpness changes, absorbed energy, delamination area, etc. are investigated by six blunt, hemispherical, conical and ogival projectiles. Hand lay-up method has been used to manufacture composite targets with 18 layers of 2D woven glass fibers of 45% fiber volume fraction. The epoxy system is made of epon 828 resin with jeffamine D400 as the curing agent. The results show that the maximum influence of projectile geometry on target behavior, occurs in ballistic limit area. In this range of initial velocity, ogival (CRH=2.5) and Blunt projectiles show the best and the worst ballistic performance. The delamination area decreases as the projectile nose sharpness increases or its initial velocity decreases. Ballistic curves for different projectiles show that the difference between projectiles behavior decreases in higher impact velocities. Because of target shear failure in blunt projectile impact, the amount of target absorbed energy for this projectile is less than other projectiles in higher impact velocities away from ballistic limit velocity.

In this article, an improved 3D finite element (FE) model of low velocity transverse impact on armchair and zigzag single-walled carbon nanotubes (SWNTs) has been developed. Numerical examples for estimating the Young’s modulus of nanotubes are presented based on explicit and implicit analysis to illustrate the accuracy of this simulation technique. Based on explicit finite element model, the maximum dynamic deflections of single-walled carbon nanotubes with different boundary conditions, geometries as well as chiralities are obtained and then compared with theory investigation. Impact of a mass on simply supported and clamped nanobeams are investigated by using nonlocal Euler–Bernoulli and Timoshenko beam theory. The simulation results demonstrated good agreement with analytical results based on Euler–Bernoulli and Timoshenko nonlocal theory. When the aspect ratio is increased, the maximum dynamic deflection at the center of the beam is increased for both of the simply supported and the clamped-clamped nanobeams. The inclusion of the nonlocal effect increases the magnitudes of dynamic deflections. The dynamic deflections predicted by the classical theory are always smaller than those predicted by the nonlocal theory due to the nonlocal effects.

In this study, the reinforcing effect of organically modified layered clay in two epoxy matrices, TETA-cured and F205-cured, was studied. The epoxy resin system is made of a diglycidyl ether of bisphenol A, Epon 828, as the epoxy prepolymer and the two hardeners were Epikure 3234, namely TETA, and Epikure F205. The organically modified clay, Closite 30B, is dispersed into the epoxy system in a 0%, 1.5%, 3% and 5% ratio in weight with respect to the matrix. The state of dispersion was characterized by X-ray diffraction method. In both systems of epoxy resin, the results of XRD show that the clay has been further intercalated by the epoxy matrix. The tensile and flexural properties of the epoxy/clay nanocomposites were investigated according to the standard tests. The results of mechanical tests indicate that the mechanical behavior of two epoxy resin systems reinforced with clay nanoparticles, are different from each other, so that adding clay into the epoxy matrices makes the TETA-cured nanocomposites more brittle and the others cured with F205 more soften. By comparing the results of two epoxy resin systems reinforced with clay nanoparticles, it is concluded that positive effect of presence of the clay nanoparticles is evident on the mechanical properties of the F205-cured epoxy resin.

Axial compression behavior of foam materials can be explained by two ideal deformation scenarios: discrete crush band process and progressive collapse. In this paper، a perfectly new model for strength assessment and quantitative/qualitative description of one-dimensional progressive collapse of aluminum foams under impulsive loadings is presented and its capability to split this way of crushing into two distinct regimes of shock wave and elastic- plasic wave propagation is highlighted. Then، using conservation relations and the new introduced model، the analytical solution of dynamic deformation of aluminum foams in the two mentioned regimes is developed. Regime 2 considers the case when the crushing front velocity is lower than the linear sound velocity of the foam; but remains higher than the effective sound velocity for a perturbation in which the amplitude lies in the so-called “plateau region’ of the static stress-strain diagram. The physical difference between this regime and the fiest one entails not only the creation a shock front associated with the collapsing foam، but also an acoustic precursor in the case of second regime. Finite element simulation is also performed to validate the analytical procedure. The numerical prediction is found to be in very good agreement with the analytical results.