In order to predict the life of engineering structures, it is necessary to investigate the strain distribution in notched members. In gineral, the Uauschinger Effect of materials under cyclic loading is not negligible...In order to predict the life of engineering structures, it is necessary to investigate the strain distribution in notched members. In gineral, the Uauschinger Effect of materials under cyclic loading is not negligible, and so the anisolropic hardening model has been suggested. From the comparison between the calculated and experimental results in this paper, we can see that even the linear kinematic hardening model is quite suitable for strain analysis under cyclic loading.展开更多
In this study,gradual and sudden reduction methods were combined to simulate a progressive failure in notched composite plates using a macro mechanics approach.Using the presented method,a progressive failure is simul...In this study,gradual and sudden reduction methods were combined to simulate a progressive failure in notched composite plates using a macro mechanics approach.Using the presented method,a progressive failure is simulated based on a linear softening law prior to a catastrophic failure,and thereafter,sudden reduction methods are employed for modeling a progressive failure.This combination method significantly reduces the computational cost and is also capable of simultaneously predicting the first and last ply failures(LPFs)in composite plates.The proposed method is intended to predict the first ply failure(FPF),LPF,and dominant failure modes of carbon/epoxy and glass/epoxy notched composite plates.In addition,the effects of mechanical properties and different stacking sequences on the propagation of damage in notched composite plates were studied.The results of the presented method were compared with experimental data previously reported in the literature.By comparing the numerical and experimental data,it is revealed that the proposed method can accurately simulate the failure propagation in notched composite plates at a low computational cost.展开更多
文摘In order to predict the life of engineering structures, it is necessary to investigate the strain distribution in notched members. In gineral, the Uauschinger Effect of materials under cyclic loading is not negligible, and so the anisolropic hardening model has been suggested. From the comparison between the calculated and experimental results in this paper, we can see that even the linear kinematic hardening model is quite suitable for strain analysis under cyclic loading.
基金the financial support of Iran’s National Elites Foundation for this research under Grant number 15/19549.
文摘In this study,gradual and sudden reduction methods were combined to simulate a progressive failure in notched composite plates using a macro mechanics approach.Using the presented method,a progressive failure is simulated based on a linear softening law prior to a catastrophic failure,and thereafter,sudden reduction methods are employed for modeling a progressive failure.This combination method significantly reduces the computational cost and is also capable of simultaneously predicting the first and last ply failures(LPFs)in composite plates.The proposed method is intended to predict the first ply failure(FPF),LPF,and dominant failure modes of carbon/epoxy and glass/epoxy notched composite plates.In addition,the effects of mechanical properties and different stacking sequences on the propagation of damage in notched composite plates were studied.The results of the presented method were compared with experimental data previously reported in the literature.By comparing the numerical and experimental data,it is revealed that the proposed method can accurately simulate the failure propagation in notched composite plates at a low computational cost.
