Dynamic Crushing Behaviors of Four Typical Auxetic Structures 2019-01-1096
The auxetic structure/material with the negative Poisson’s ratio properties
can contract when compressed and expand when stretched, different from
the conventional structures/materials. Due to the unique properties, it can
have higher stiffness and better impact resistance with lightweight.
Therefore, the auxetic structures/materials have been applied in various
engineering field, such as automobile crash box, suspension mount etc.
For auxetic structures/materials with negative Poisson’s ratio, there are
four typical configurations (re-entrant, double arrowed, star and chiral).
However, most researches have only focused on the mechanical
properties on one structure. The comparison on the dynamic behaviors
and crashworthiness between the four auxetic structures have not been
studied. In this paper, the finite element models were developed for four
typical auxetic structures. The deformation modes and energy absorption
properties of auxetic structures are explored under different impact
velocities. Some interesting conclusions can be obtained to guide the
engineers to how to chose and utilize the four typical auxetic structures.
Ge Cheng Qiang, Qiang Gao, Liangmo Wang
Nanjing UniversityofScienceandTechnology, Chinese University of Hong Kong, Nanjing Univ of Science & Technology