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首页> 外文期刊>International Journal for Numerical Methods in Engineering >A damage to crack transition model accounting for stress triaxiality formulated in a hybrid nonlocal implicit discontinuous Galerkin‐cohesive band model framework
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A damage to crack transition model accounting for stress triaxiality formulated in a hybrid nonlocal implicit discontinuous Galerkin‐cohesive band model framework

机译：混合非局部隐含性不连续Galerkin-Coolyive Band模型框架造成裂缝转换模型核算的裂缝转换模型核算

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Summary >Modelling the entire ductile fracture process remains a challenge. On the one hand, continuous damage models succeed in capturing the initial diffuse damage stage but are not able to represent discontinuities or cracks. On the other hand, discontinuous methods, as the cohesive zones, which model the crack propagation behaviour, are suited to represent the localised damaging process. However, they are unable to represent diffuse damage. Moreover, most of the cohesive models do not capture triaxiality effect. In this paper, the advantages of the two approaches are combined in a single damage to crack transition framework. In a small deformation setting, a nonlocal elastic damage model is associated with a cohesive model in a discontinuous Galerkin finite element framework. A cohesive band model is used to naturally introduce a triaxiality‐dependent behaviour inside the cohesive law. Practically, a numerical thickness is introduced to recover a 3D state, mandatory to incorporate the in‐plane stretch effects. This thickness is evaluated to ensure the energy consistency of the method and is not a new numerical parameter. The traction‐separation law is then built from the underlying damage model. The method is numerically shown to capture the stress triaxiality effect on the crack initiation and propagation. </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 xmlns =“http://www.wiley.com/namespaces/wiley”type =“main”xml：id =“nme5618-abs-0001”xml：lang =“en”> <title type =“main” >摘要</ title> >建模整个延性骨折过程仍然是一个挑战。一方面，连续损坏模型成功地捕获初始漫射损伤阶段，但无法代表不连续性或裂缝。另一方面，不连续的方法，作为模拟裂缝传播行为的粘性区域，适合代表局部破坏性过程。但是，它们无法代表漫反射损坏。而且，大多数凝结模型都不会捕获三轴性效果。在本文中，两种方法的优点在于对裂纹过渡框架的单一损坏组合。在小变形设置中，非局部弹性损伤模型与不连续的Galerkin有限元框架中的粘性模型相关联。凝聚力模型用于自然地引入粘性法中的三轴性依赖性行为。实际上，引入数值厚度以恢复3D状态，必须包含面内拉伸效果。评估该厚度以确保方法的能量一致性，并且不是新的数值参数。然后从底层损伤模型构建牵引分离法。该方法在数上显示以捕获对裂纹启动和传播的应力三轴性效应。</ 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-20801/'>《International Journal for Numerical Methods in Engineering》</a> <b style="margin: 0 2px;">|</b><span>2018年第3期</span><b style="margin: 0 2px;">|</b><span>共37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=Leclerc Julien&option=202" target="_blank" rel="nofollow">Leclerc Julien;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wu Ling&option=202" target="_blank" rel="nofollow">Wu Ling;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nguyen Van Dung&option=202" target="_blank" rel="nofollow">Nguyen Van Dung;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Noels Ludovic&option=202" target="_blank" rel="nofollow">Noels Ludovic;</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>Department of Aerospace and Mechanical EngineeringComputational &</p> <p>Multiscale Mechanics of Materials University of LiègeAllée de la Découverte 9 B‐4000 Liège Belgium;</p> <p>Department of Aerospace and Mechanical EngineeringComputational &</p> <p>Multiscale Mechanics of Materials University of LiègeAllée de la Découverte 9 B‐4000 Liège Belgium;</p> <p>Department of Aerospace and Mechanical EngineeringComputational &</p> <p>Multiscale Mechanics of Materials University of LiègeAllée de la Découverte 9 B‐4000 Liège Belgium;</p> <p>Department of Aerospace and Mechanical EngineeringComputational &</p> <p>Multiscale Mechanics of Materials University of LiègeAllée de la Découverte 9 B‐4000 Liège Belgium;</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/6940.html" title="工程数学">工程数学;</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=cohesive band method&option=203" rel="nofollow">cohesive band method;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=cohesive zone method&option=203" rel="nofollow">cohesive zone method;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=damage&option=203" rel="nofollow">damage;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=fracture&option=203" rel="nofollow">fracture;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=discontinuous Galerkin method&option=203" rel="nofollow">discontinuous Galerkin method;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=stress triaxiality&option=203" rel="nofollow">stress triaxiality;</a> </p> <div class="translation"> 机译：凝聚带法;凝聚区法;损伤;骨折;不连续的Galerkin方法;压力三轴性; 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