Determination of effective stress intensity factors under mixed‐mode from digital image correlation fields in presence of contact stresses and plasticity

Bonniot Thomas; Doquet Véronique; Mai Si Hai

摘要

Abstract >Digital image correlation (DIC) is more and more popular to monitor fatigue crack growth and to determine the stress intensity factors. However, the posttreatment of the recorded displacement fields becomes tricky when the crack faces are not stress‐free and when crack tip plasticity becomes significant. Several posttreatment methods to locate the crack tip and measure the effective stress intensity factors in such cases are compared, using finite element method‐computed displacement fields, and then used on real DIC fields. An approach coupling DIC and finite element method is proposed to estimate the contact stresses along the crack. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”XML：ID =“str12332-abs-abs-0001”> <标题类型=“main”>抽象</ title> >数字图像相关（DIC）越来越受欢迎，以监测疲劳裂缝的增长并确定应力强度因子。然而，当裂缝面不受压力并且当裂纹尖端可塑性变得显着时，记录的位移场的后处理变得棘手。使用有限元方法计算的位移字段比较了几种定位裂纹尖端并测量这种情况下的有效应力强度因子的方法，然后在真实的DIC场上使用。提出了一种接近耦合DIC和有限元方法来估计沿裂缝的接触应力。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-28616/'>《Strain》</a> <b style="margin: 0 2px;">|</b><span>2020年第1期</span><b style="margin: 0 2px;">|</b><span>共16页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bonniot Thomas&option=202" target="_blank" rel="nofollow">Bonniot Thomas;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Doquet Véronique&option=202" target="_blank" rel="nofollow">Doquet Véronique;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mai Si Hai&option=202" target="_blank" rel="nofollow">Mai Si Hai;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Laboratoire de Mécanique des SolidesCNRS UMR 7649 Ecole PolytechniquePalaiseau France;</p> <p>Laboratoire de Mécanique des SolidesCNRS UMR 7649 Ecole PolytechniquePalaiseau France;</p> <p>SNCF Innovation and ResearchSaint‐Denis France;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/1674.html" title="工程基础科学">工程基础科学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=contact&option=203" rel="nofollow">contact;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=crack‐tip plasticity&option=203" rel="nofollow">crack‐tip plasticity;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=DIC&option=203" rel="nofollow">DIC;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fatigue crack&option=203" rel="nofollow">fatigue crack;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=friction&option=203" rel="nofollow">friction;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mode II&option=203" rel="nofollow">Mode II;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mode I+II&option=203" rel="nofollow">Mode I+II;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=nonproportional mixed mode&option=203" rel="nofollow">nonproportional mixed mode;</a> </p> <div class="translation"> 机译：联系;裂纹尖塑料;DIC;疲劳裂缝;摩擦;模式II;模式I + II;非营业混合模式; 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