基于连续损伤模型的层合板多钉连接结构失效分析  

THE FAILURE ANALYSIS OF THE SINGLE-LAP MULTI-BOLT COMPOSITE JOINTS BASING ON THE CONTINUUM DAMAGE MODEL

作　　者：周银华[1] 侯赤[1] 赵美英[1] 万小朋[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《机械强度》2016年第4期857-862,共6页Journal of Mechanical Strength

摘　　要：为了对复合材料多钉结构进行失效分析,本文应用复合材料连续损伤模型以及螺栓Joshon-Cook塑性力学模型,模拟复合材料单搭接多钉连接结构的失效模式,在验证方法有效性的基础上,分析了间隙配合的选取对连接结构的影响。研究发现,间隙配合对结构的失效模式、载荷响应影响并不明显,但会加剧结构的次弯曲效应;提出的模型能够准确预测连接结构的位移载荷响应以及极限失效载荷。In order to investigate the failure of composite multi-bolt joints,a continuum damage model for composites which achieved good agreements with experiments,and the Johnson-Cook plasticity model for bolts,were employed to model the singlelap multi-bolt composite joints in this paper. The effects on the composite bolted joints with variable clearances have been studied. It has been found that the clearance has slightly effects on the failure modes and loading responses of the joints,but exacerbates the secondary bending of single-lap joints,and the models proposed in the article have achieved relatively accurate load-displacement responses and ultimate failure loads of the whole joints in simulation.

关 键 词：复合材料 螺栓连接 连续损伤 次弯曲 旁路载荷 

分 类 号：TH145.9[一般工业技术—材料科学与工程]