![]() On the other hand, the post-failure softening algorithm increases the ductile resistance behavior of the material more realistically, compared to experiments and provides additional information regarding the state of stress governing the fracture process. It turns out that in the absence of softening in fracture, the crack growth rate increases with little resistance opposite of what has been observed in fracture response of typical steels. Post-failure softening is then coupled with the constitutive model to describe ductile fracture propagation. Researchers performed companion finite element (FE) analysis prior to each test. specification tank cars under similar shell impact conditions. ![]() Ductile fracture toughness usually referred to as resistance curve is measured from two types of typical fracture mechanics specimen geometries: the compact tension C(T) and the three-point bending SE(B). At the time of puncture, the impact developed a maximum force of approximately 1.7 million pounds, and the impactor indented the tank car to a depth of approximately 60 inches. The fracture initiation process is determined through a comprehensive mechanical tests, which includes tensile tests on standard dog-bone specimens, flat specimens with circular cutouts and central hole, notched round bars, punch indentation tests on circular blanks and special flat shear specimens. The objective of the present work is to incorporate the effect of post-failure softening on fracture initiation modeling of steel alloy TC128 commonly used in railroad tank car manufacturing.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |