Homogenizing interfacial shear stress in brick-and-mortar structured composites via gradient modulus for enhanced mechanical properties

作     者：Yang Gao Jiawei He Jie Jiang Jianping Zuo 高阳;何佳伟;蒋洁;左建平

作者机构：School of Mechanics and Civil EngineeringChina University of Mining and Technology(Beijing)Beijing100083China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2024年第40卷第6期

页      面：115-124页

核心收录：

学科分类：08[工学] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.12202447) China Postdoctoral Science Foundation(Grant No.2021M703289) the Fundamental Research Funds for the Central Universities(Grant No.2023ZKPYLJ04) Excellent Youth Team Funding Project of Central Universities(Grant No.2023YQTD01) 

主　　题：Stress concentration Interface delamination Brick-and-mortar structure Composite 

摘      要：Inspired by nature,various biomimetic materials have been synthesized for enhanced mechanical properties,among which composites with brick-and-mortar structures attract the most *** such bio-inspired composites,the matrix layer mainly functions to transfer load between bricks through shearing,while the shear stress in the matrix is not uniform but highly concentrated on the interface ends,which tends to initiate cracks and evoke interface delamination in *** enhance the composites’resistance to interface delamination,we propose to homogenize the shear stress by adopting a matrix with a gradient modulus.A theoretical solution to the optimal gradient modulus of the matrix layer is obtained,followed by computational ***,composites with such functionally graded matrices are further demonstrated to possess higher elastic limits,higher resilience,and flaw tolerance than the uniform *** results of this paper should be of great value to the design and synthesis of advanced structural materials for superior mechanical performance.