Modeling Splitting and Spalling of Columnar Ice Compressed Biaxially: The Role of Crack Nucleation

机译：柱状冰压缩的模拟分裂与剥落双轴：裂纹成核的作用

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Abstract >Columnar ice exhibits three failure modes under increasing lateral confinement across the columns: splitting, Coulombic shear faulting, and spalling. Modeling of the splitting‐to‐spalling transition under increasing confined compression is considered here. Shear faulting is not considered. A three‐dimensional crack nucleation model, based on a grain boundary sliding approach, is formulated to model brittle failure mechanisms under biaxial compression along and across the columns. The growth of the nucleated crack is based on the wing crack approach. The numerical results were in good agreement with experimental data for both across‐column and along‐column biaxial compression. The model shows that in columnar ice, crack nucleation preceded by sliding along tapered grain boundaries induces splitting‐to‐spalling transition under increasing confinement. </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”> <标题类型=“main”>抽象</ title> >柱状冰在柱上增加横向限制下的三种故障模式：分裂，库仑剪切断层和拼接。在此考虑在增加限制压缩下的分裂到剥落过渡的建模。不考虑剪切断层。基于晶界滑动方法的三维裂纹成核模型配制成模拟双轴压缩下的脆性破坏机制，横跨柱。核心裂缝的生长是基于机翼裂纹方法。数值结果与柱上柱和柱柱压缩的实验数据很好。该模型表明，在柱状冰，沿锥形晶界滑动前面的裂纹成核在增加的限制下引起分裂到剥落的转变。</ 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-34677/'>《Journal of geophysical research. Solid earth: JGR》</a> <b style="margin: 0 2px;">|</b><span>2019年第4期</span><b style="margin: 0 2px;">|</b><span>共17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=Kolari Kari&option=202" target="_blank" rel="nofollow">Kolari Kari;</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>VTT Technical Research Centre of Finland LtdEspoo Finland;</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/163.html" title="地球物理学">地球物理学;</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=brittle failure&option=203" rel="nofollow">brittle failure;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=columnar ice&option=203" rel="nofollow">columnar ice;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=wing crack&option=203" rel="nofollow">wing crack;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=FE modeling&option=203" rel="nofollow">FE modeling;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=splitting&option=203" rel="nofollow">splitting;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=anisotropic damage&option=203" rel="nofollow">anisotropic damage;</a> </p> <div class="translation"> 机译：脆性失败;柱状冰;翼裂;Fe造型;分裂;各向异性损伤; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025591120.html">Modeling Splitting and Spalling of Columnar Ice Compressed Biaxially: The Role of Crack Nucleation</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kolari Kari&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Kolari Kari </a> <a href="/journal-foreign-34677/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of geophysical research. 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Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. 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