Experimental and numerical analysis of the fracture envelope of composite adhesive joints

Science and Technology of Materials Pub Date : 2018-09-01 DOI:10.1016/j.stmat.2017.11.001

M.A.S. Santos , R.D.S.G. Campilho

{"title":"Experimental and numerical analysis of the fracture envelope of composite adhesive joints","authors":"M.A.S. Santos , R.D.S.G. Campilho","doi":"10.1016/j.stmat.2017.11.001","DOIUrl":null,"url":null,"abstract":"<div>To increase the confidence in the design of adhesive structures, it is necessary to accurately predict their strength and fracture properties (critical strain energy release rate in tension, GIC, and shear, GIIC). It is of great importance the perception of fracture under mixed-mode, namely in which relates to the strain energy release rate in tension, GI, and shear, GII. This allows choosing the best failure criterion to use in cohesive zone models (CZM), to predict the joints’ behaviour. This work presents an experimental and numerical study using the Single-Leg Bending (SLB) test on bonded specimens to obtain the mixed-mode fracture properties. The analysis of GI and GII obtained during the experimental phase were addressed. Framing the obtained values in several fracture envelopes enable to select which failure criterion is more appropriate for each adhesive. In the numerical simulations it was possible to reproduce the observed behaviour of the experimental tests, with a positive validation of the chosen propagation criteria.</div>","PeriodicalId":101145,"journal":{"name":"Science and Technology of Materials","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.stmat.2017.11.001","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Science and Technology of Materials","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2603636318300010","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 4

Abstract

To increase the confidence in the design of adhesive structures, it is necessary to accurately predict their strength and fracture properties (critical strain energy release rate in tension, G_IC, and shear, G_IIC). It is of great importance the perception of fracture under mixed-mode, namely in which relates to the strain energy release rate in tension, G_I, and shear, G_II. This allows choosing the best failure criterion to use in cohesive zone models (CZM), to predict the joints’ behaviour. This work presents an experimental and numerical study using the Single-Leg Bending (SLB) test on bonded specimens to obtain the mixed-mode fracture properties. The analysis of G_I and G_II obtained during the experimental phase were addressed. Framing the obtained values in several fracture envelopes enable to select which failure criterion is more appropriate for each adhesive. In the numerical simulations it was possible to reproduce the observed behaviour of the experimental tests, with a positive validation of the chosen propagation criteria.

查看原文本刊更多论文

复合材料胶合接头断裂包络的实验与数值分析

为了提高粘接结构设计的可信度，有必要准确预测其强度和断裂性能(在拉伸、GIC和剪切中的临界应变能释放率，GIIC)。混合模式下的断裂感知非常重要，即与拉伸GI和剪切GII下的应变能释放率有关。这允许选择最佳的破坏准则，用于黏聚区模型(CZM)，以预测节点的行为。本文采用单腿弯曲(SLB)试验对粘结试件进行了试验和数值研究，以获得混合模式断裂特性。对实验阶段所得的GI和GII进行了分析。将得到的值放在几个断裂包膜中，可以选择更适合每种胶粘剂的破坏准则。在数值模拟中，有可能再现实验测试中观察到的行为，并对所选的传播标准进行了积极验证。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Science and Technology of Materials

自引率

0.00%

发文量