Void content and displacement ratio effects on fatigue crack growth in thick adhesively bonded composite joints under constant amplitude loading

被引：5

作者：

Fan, Jialiang ^{[1
]}

Ikeda, Keiyu ^{[2
]}

Vassilopoulos, Anastasios P. ^{[3
]}

Michaud, Veronique ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne EPFL, Inst Mat IMX, Lab Proc Adv Compos LPAC, CH-1015 Lausanne, Switzerland

[2] Tokyo Inst Technol, Sch Engn, Dept Mech Engn, Tokyo, Japan

[3] Ecole Polytech Fed Lausanne EPFL, Compos Mech Grp GR MeC, CH-1015 Lausanne, Switzerland

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2024年 / 188卷

基金：

瑞士国家科学基金会;

关键词：

Fatigue; Thick Joints; Adhesives; Composites; Bonding; LIFE MODEL; PREDICTION; BEHAVIOR;

D O I：

10.1016/j.ijfatigue.2024.108508

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This article investigates the influence of displacement ratio (Rd-ratio) and void content on the fatigue behavior of Double Cantilever Beam (DCB) joints with thick adhesive layer (10 mm). Two Rd-ratios and two different void contents were studied. To achieve cohesive failure, grooved DCB geometry was utilized to guide the crack propagation path into the adhesive layer, and the experimental conditions were adjusted to maintain stable propagation. The results showed that the crack propagation path under fatigue loading was mainly determined by the void size and distribution. Secondary cracks were also observed from digital image correlation (DIC) and X-ray tomography, which could lead to crack path switching on the lateral surface and influence the crack measurement. Data analysis using the total fatigue life model showed that the fatigue crack growth (FCG) depends on the Rd-ratio, and void content.

引用

页数：10

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