Strain-based failure criteria utilizing the modified maximum strain

One of the existing problems is increasing the accuracy of failure criteria under multidirectional loading. The results obtained from different tests have shown that the maximum strain values in samples under multidirectional loading differ from those under unidirectional loading. One of the ways to increase the accuracy of failure criteria is to use the generalized maximum strain in determining the maximum strain of the material under multidirectional loading, whose values depend on the loading type. This research aims to introduce the generalized maximum strain, provide a method to calculate it, and finally, use the obtained method for the failure criterion. The maximum strain energy values in the same direction were used to obtain the maximum strain values. In this way, the amount of strain energy depending on different loading directions and the new value of the maximum strain is calculated. In previous studies, the maximum strain values were not a function of the loading type and had constant values. In this research, the generalized maximum strain value is calculated depending on the type of loading. Among the results obtained in this research is the introduction of the generalized maximum strain phenomenon and its use in the failure criterion. The results show that the maximum stress values predicted by the failure criterion presented in the present study, compared with the results obtained from the experimental tests, have higher accuracy than those obtained by the Hashin failure criterion.

کلیدواژه ها:

failure criterion ، modified maximum strain ، composite ، modified Hashin criteria