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On energy‐absorbing mechanisms of metal/WF‐CFRP hybrid composite columns

机译：关于金属/ WF-CFRP杂交复合柱的能量吸收机制

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Abstract > Hybrid material system, comprised of metal and carbon fiber reinforced plastic (CFRP), combines the excellent mechanical performance and lightweight feature of CFRP with the competitive material cost and superior toughness of metal. By virtue of such mingled feature, metal/CFRP hybrid structure exhibits great potential in automotive components. This study aims to investigate the crushing behavior of aluminum/WF‐CFRP (woven fabric CFRP) hybrid columns subjected to dynamic loading condition by comparing with the corresponding individual columns made of single material (aluminum column and WF‐CFRP column). The dynamic axial crushing tests indicate that specific energy absorption of WF‐CFRP column is 45% higher than that of the aluminum column and 27% superior to that of the hybrid column, while the total energy absorption of the hybrid column is about 8% higher than the summation of WF‐CFRP column and aluminum column. Afterward, several finite element models are developed to reveal the underlying energy‐absorbing mechanisms and the influences of each factor for the hybrid columns. The numerical results show that specific energy absorption of the hybrid columns is negatively correlated with the metal volume fraction ( <fi>F</fi> <sub> <fi>m</fi> </sub> ), when inner aluminum wall thickness ( <fi>t</fi> <sub> <fi>m</fi> </sub> ) equals to 1.0?mm. It is also found that crushing process of the hybrid columns with <fi>l</fi> =?2 (2 CFRP layers) is dominated by the progressive folding of inner aluminum column, leading to a lower damage level of CFRP and lower load carrying capacity. With increasing wrapped CFRP layer number up to 8, the inner aluminum column starts to generate internal inversion deformation mode due to the restriction of the outer CFRP layers, and outer CFRP layers exhibit progressive failure. The energy‐absorbing mechanisms analysis indicates that the internal energy of the internally inversed aluminum column is significantly higher than that of the progressively folded aluminum column, and thus such special deformation mode is capable to offer a more stable and higher load carrying capacity for the hybrid columns. Besides, it is also found that the plastic deformation of the inner aluminum column is the major energy‐absorbing mechanism, which is followed by the crushing failure of outer CFRP layers. The combination mode of thinner aluminum column and thicker CFRP layers tends to offer higher energy‐absorbing capacity, which is much higher than that of the summation of corresponding individual columns. Finally, a complex proportional assessment method is considered to select the optimal configuration achieving the balance of material cost and structural crashworthiness. The present study is expected to provide guideline for design of metal/CFRP hybrid columns. </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> > 由金属和碳纤维增强塑料（CFRP）组成的混合材料系统结合了CFRP的优异机械性能和轻质特征，具有竞争性的材料成本和卓越的金属韧性。由于这种混合特性，金属/ CFRP混合结构在汽车组件中具有很大的潜力。本研究旨在通过与由单材料（铝柱和WF-CFRP柱制成的相应的单个柱进行比较，研究铝/ WF-CFRP（编织织物CFRP）杂交柱的破碎行为。动态轴向破碎试验表明，WF-CFRP塔的特定能量吸收高于铝柱高的45％，27％优于杂交塔的27％，而杂交塔的总能量吸收量高约8％比WF-CFRP柱和铝柱的总和。之后，开发了几种有限元模型以揭示潜在的能量吸收机制和混合柱的每个因素的影响。数值结果表明，杂交塔的特定能量吸收与金属体积分数呈负相关（ <fi> f </ fi> <sub> <fi> m </ fi> </ sub> ），当内铝壁厚度（ <fi> t </ fi> <sub> <fi> m </ fi> </ sub> ）等于1.0？mm。还发现混合柱的破碎过程 <fi> l </ fi> = 2（2个CFRP层）由内铝柱的渐进折叠主导，导致CFRP的较低损伤水平和较低的负载承载能力。随着包裹的CFRP层数高达8，内铝柱由于外CFRP层的限制而开始产生内部反转变形模式，外CFRP层表现出渐进式故障。能量吸收机构分析表明，内反转的铝柱的内部能量显着高于逐渐折叠的铝柱的内部能量，因此这种特殊变形模式能够为混合动力车提供更稳定和更高的负载承载能力列。此外，还发现内铝柱的塑性变形是主要的能量吸收机构，然后是外CFRP层的破碎失效。较薄的铝柱和较厚的CFRP层的组合方式倾向于提供更高的能量吸收能力，远高于相应单个柱的总和的能量吸收能力。最后，考虑了复杂的比例评估方法选择实现材料成本平衡和结构崩溃的最佳配置。预计本研究将提供金属/ CFRP混合柱设计指南。 </ 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-29566/'>《Polymer Composites》</a> <b style="margin: 0 2px;">|</b><span>2020年第6期</span><b style="margin: 0 2px;">|</b><span>共25页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> </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"> </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/7852.html" title="增强塑料、填充塑料">增强塑料、填充塑料;</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=CFRP&option=203" rel="nofollow">CFRP;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=crashworthiness&option=203" rel="nofollow">crashworthiness;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=energy‐absorbing mechanisms&option=203" rel="nofollow">energy‐absorbing mechanisms;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=metal/CFRP hybrid column&option=203" rel="nofollow">metal/CFRP hybrid column;</a> </p> <div class="translation"> 机译：CFRP;CRASHWORCHINCE;能量吸收机制;金属/ CFRP杂交柱; </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/0704023065853.html">On energy-absorbing mechanisms of metal/WF-CFRP hybrid 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