جستجوی مقالات مرتبط با کلیدواژه « مدل محاسباتی » در نشریات گروه « مکانیک »

The vibration stress relief process is currently utilized as a suitable alternative to the thermal stress relief method to reduce the residual stress of various alloys. In this study, a theoretical model based on the analytical equations is presented. The proposed model including the frequency, amplitude and the process time have been revised compared to the previously proposed models to make it more comprehensible and applicable. Thus, the assumed parameters including the number of cycles (duration), the strain rate (loading frequency), and the amplitude (loading value) are embedded in the model. Experimental tests measuring residual stress distribution by X-ray diffraction method are conducted on specific spots to compare the results with the experiments. An acceptable range of error (below 10%) has been observed between the theoretical and experimental results. According to the obtained results, the model has an acceptable performance for residual stress calculation after the process. According to the results, vibration amplitude has been about 19% more effective than the other parameters. In addition, increasing the amplitude has increased the affirmative effect of the frequency parameter by 38% compared to the other parameters. To further examine the presented model, the variations of the stress rate has been analyzed versus each influential parameter.