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Finite element modeling and analysis of crack propagation in multiple planes of a structure

机译：结构多平面裂纹扩展的有限元建模与分析

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#$%^&*AU2017202835A120180118.pdf#####28 FINITE ELEMENT MODELING AND ANALYSIS OF CRACK PROPAGATION IN MULTIPLE PLANES OF A STRUCTURE ABSTRACT An apparatus is provided for predicting propagation of a crack in a structure. A finite element model is provided that represents the layers of the structure by meshes of elements having interfaces defined between adjacent elements in orthogonal potential crack planes. Overlapping interface elements are defined at the interfaces and include a plurality of node pairs (Ni,) spaced apart along multiple interfaces and having a node cluster therebetween that includes bound node pairs. The nodes of each node pair are coincident with respective nodes of the adjacent elements on opposite sides of the interface. An analysis of the finite element model under an external load is performed in which a crack tip is established at a node cluster. A strain energy release rate between the nodes of the bound node pairs of the node cluster is calculated and based thereon propagation of the crack is identified.2/11 200 kt At Mk .q P, .. .... ............................. ... ............................. .............................. .................................. ................................. .................................. .................................. ............. .................................. ................................... ...... ............ .................................. ....... ............ ................................... .............. ............... ............ .............. ............. .............. ....... ... ............... ....... ... . ............ .............. ............. ............ .............. .................................. ............ .............. ................................. ............ .............. .................................. ............ .............. .................................. ............ .............. .................................. .................................. .................................. ................................... .................................. .................................. ................................... ................. ................... ... ........... ......... ........... ........... .... .. . ........... ......... .. Let ._:l 206X qw ........ .................. ............... ...... ............... ........................ ......................... ........................ ......................... ................... y ........ ........... .......................... ......................... ......................... .... ......................... ......................... : ......... ....................... ....................... .......... .................................. ...................... .................................. ......................... .................................. ............. ............. .............. ... ............. ............. ........... ....... ... ............ ............. ................ ....... ........ ............................... ......... ................. ....... ............ ....................... ....................... ................... ... .. ................................... ............................. ............................ ... .... ............................. . ............................ ... .............................. ........................... ......................... .......................... ................ ..... ....... ..... 206y NODES 204 INTERFACE ELEMENT 208 COINCIDENT NODES 210 FIG. 2A

机译：＃$％^＆* AU2017202835A120180118.pdf #####28裂纹的有限元建模与分析在结构的多个平面中传播抽象提供一种用于预测结构中的裂纹扩展的设备。有限的提供了通过单元网格表示结构层的单元模型具有在正交潜在裂纹平面中的相邻元素之间定义的界面。重叠接口元素在接口处定义，并包括多个节点对（Ni，）沿多个接口间隔开，并且它们之间的节点群集包括绑定节点对。每个节点对的节点与节点的相应节点重合界面相对两侧的相邻元素。有限元模型分析在外部载荷下，在节点簇上建立裂纹尖端。一株计算节点簇的绑定节点对的节点之间的能量释放率并据此确定裂纹的扩展。2/11200kt在Mk.q P，.. .... .................................................................................................................................................. ................................................................. ............................................................. ........................................................................ ................................................................................................ ........................................................................ .................................................................. ................................................................................... ........ ............. .............. ....... ..... ..... ................ ... ............................................... .................................................................. ...... .............. .................................. ........ ............ .............. ................ .............................................................. ....................................................................................... ............................................................................................... ...................... ..................................... .......................................................................... ................................................................... ...................................................................................... ...... .................................. ............ ...... ..................... ............... ..让._：l206Xw....................................................................................................... ..................................................................... .................................................. ... y ........ ........... ................................... ................................................................... ................................... ............................... ...：....... ................................ ....................... ................................... ..................................................................................... ...................................................................... ............. .................... ...... ............. ........... ................................................... ....... ............................. ........................................... ....... ................................................. ..................................................................... ............ ........................................................... ........ ...................................... ..... ............................................................................... ...................................................................................... ..................................................... ...206岁节点204界面元素208重合节点210图。 2A

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公开/公告号AU2017202835A1

专利类型
公开/公告日2018-01-18

原文格式PDF
申请/专利权人 THE BOEING COMPANY;
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申请/专利号AU20170202835
发明设计人 MABSON GERALD E.;RAMNATH MADHAVADAS;WILKINSON MARIANNE E.;
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申请日2017-04-28
分类号G01N19/08;G06F19;
国家 AU
入库时间 2022-08-21 12:45:18

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