Indentation Response of the Auxetic Bone-inspired Cellular Structure Materials

in this work we investigate the indentation response of the auxetic cellular structure materials. The auxetic cellular structure material is selected as the newly bone-inspired cellular structure material. The elastic material properties of this material are characterized by nine elastic constants. Thus, to study the indentation responses of the auxetic bone-inspired cellular structure materials, the solutions for the indentation of a rigid indenter on an anisotropic elastic half-plane are employed. It was found that auxetic (with a negative Poisson ratio) bone-inspired cellular structure materials can effectively reduce the local contact pressure under the indenter compared to those with positive and zero Poisson ratios. The auxetic BCS material, therefore, has great potential in protecting key engineering structures.