TY - DATA T1 - Stress Distribution in Graded Cellular Materials Under Dynamic Compression PY - 2017/12/05 AU - Peng Wang AU - Xiaokai Wang AU - Zhijun Zheng AU - Jilin Yu UR - https://scielo.figshare.com/articles/dataset/Stress_Distribution_in_Graded_Cellular_Materials_Under_Dynamic_Compression/5671432 DO - 10.6084/m9.figshare.5671432.v1 L4 - https://ndownloader.figshare.com/files/9916429 L4 - https://ndownloader.figshare.com/files/9916432 L4 - https://ndownloader.figshare.com/files/9916435 L4 - https://ndownloader.figshare.com/files/9916438 L4 - https://ndownloader.figshare.com/files/9916441 L4 - https://ndownloader.figshare.com/files/9916444 L4 - https://ndownloader.figshare.com/files/9916447 L4 - https://ndownloader.figshare.com/files/9916450 L4 - https://ndownloader.figshare.com/files/9916453 L4 - https://ndownloader.figshare.com/files/9916456 L4 - https://ndownloader.figshare.com/files/9916459 L4 - https://ndownloader.figshare.com/files/9916462 L4 - https://ndownloader.figshare.com/files/9916465 L4 - https://ndownloader.figshare.com/files/9916468 L4 - https://ndownloader.figshare.com/files/9916471 L4 - https://ndownloader.figshare.com/files/9916474 L4 - https://ndownloader.figshare.com/files/9916477 L4 - https://ndownloader.figshare.com/files/9916480 L4 - https://ndownloader.figshare.com/files/9916483 L4 - https://ndownloader.figshare.com/files/9916486 KW - dynamic crushing KW - density gradient KW - stress distribution KW - stress enhancement KW - shock wave speed N2 - Abstract Dynamic compression behaviors of density-homogeneous and density-graded irregular honeycombs are investigated using cell-based finite element models under a constant-velocity impact scenario. A method based on the cross-sectional engineering stress is developed to obtain the one-dimensional stress distribution along the loading direction in a cellular specimen. The cross-sectional engineering stress is contributed by two parts: the node-transitive stress and the contact-induced stress, which are caused by the nodal force and the contact of cell walls, respectively. It is found that the contact-induced stress is dominant for the significantly enhanced stress behind the shock front. The stress enhancement and the compaction wave propagation can be observed through the stress distributions in honeycombs under high-velocity compression. The single and double compaction wave modes are observed directly from the stress distributions. Theoretical analysis of the compaction wave propagation in the density-graded honeycombs based on the R-PH (rigid-plastic hardening) idealization is carried out and verified by the numerical simulations. It is found that stress distribution in cellular materials and the compaction wave propagation characteristics under dynamic compression can be approximately predicted by the R-PH shock model. ER -