生物软组织力学测试及相关理论研究

Reasonable constitutive models and correct material parameters are the prerequisites for effective numerical calculation and target preparation to characterize the mechanical response of biological soft tissues under high-speed impact. The typical mechanical testing methods for biological soft tissues and materials are elaborated from single loading mode to shear loading and even mixed loading, and detailed theoretical derivation is carried out. The results show that: principal elongations under each loading mode are obtained, based on which the principal stress plane, maximum deformation value, and direction can be obtained to evaluate the maximum stress plane and damage degree of the biological soft tissue and its corresponding bionic target, which is convenient for in-depth exploration of the correlation between the microstructure of the biological soft tissue as well as simulated material design and their macro mechanical properties, with the aim of establishing a more scientific and reasonable bionic human target.