Evaluation of the Residual Strength of Structures Made of Composite Materials Based on a Conservative Distribution of Damage Parameters

21st Winter School on Continuous Media Mechanics

计算机技术

Fedulov, B.N.^1 ; Fedorenko, A.N.^1 ; Lomakin, E.V.^2

CDM2, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, Moscow

121205, Russia^1

Lomonosov Moscow State University, GSP-1, Leninskie Gory, Moscow

119991, Russia^2

关键词: Barely visible impact damages;    Damage parameter;    Direct modelling;    Impact process;    Impactors;    Residual strength;    Special algorithms;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/581/1/012023/pdf
DOI  :  10.1088/1757-899X/581/1/012023

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The purpose of this study is to develop the method that conservatively estimates the residual strength of a composite structure with barely visible impact damage (BVID), without direct modelling of impact process. The basis of the research is in the conservative transformation of kinetic energy of impactor into damage of the material, which is associated with the system of microcracks in the matrix, fiber and interface. A special algorithm that distributes damage parameters in worst way for the composite structure provides conservative estimation of residual strength. Thus, bvid allowables can be set using fewer experiments.