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2.发明公开
公开(公告)号：EP4181007A2
公开(公告)日：2023-05-17
申请号：EP22207655.6
申请日：2022-11-15
IPC分类号： G06F30/12 , G06F30/23 , G06F113/26
摘要： Systems and methods for semi-discrete modeling of progressive damage and failure in composite laminate materials are disclosed. An example method includes receiving, from a user, a fibrous strip width and a fibrous strip spacing, and creating a finite-element (FE) mesh by: generating, using a structured hex meshing algorithm, a plurality of fibrous strips along a fiber direction based on the fibrous strip width and the fibrous strip spacing, and generating, using a free hex-dominated advancing front meshing algorithm, a bulk element between each of the plurality of fibrous strips. The FE mesh may define a portion of a composite laminate material. The example method includes determining a predicted mechanical response of the composite laminate material by: generating a constitutive model corresponding to the composite laminate material based on the FE mesh, and inputting a stress value or a strain value to the constitutive model to generate the predicted mechanical response.
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3.发明公开
公开(公告)号：EP4181008A3
公开(公告)日：2023-06-21
申请号：EP22207656.4
申请日：2022-11-15
IPC分类号： G06F30/12 , G06F30/23 , G06F113/26
摘要： Systems and methods for semi-discrete modeling of delamination migration in composite laminate materials are disclosed. An example method includes receiving a specimen geometry and a specimen stacking sequence. The example method also includes creating a finite-element (FE) mesh that defines a composite laminate material by: generating, using a mesh generation tool, a plurality of plies shaped according to the specimen geometry, and connecting the plies together based on the stacking sequence by placing cohesive elements between each adjacent pair of plies. The example method also includes determining a predicted mechanical response of the composite laminate material by: generating a constitutive model corresponding to the composite laminate material based on the FE mesh, and inputting a strain value to the constitutive model to generate the predicted mechanical response.
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4.发明公开
公开(公告)号：EP4181007A3
公开(公告)日：2023-06-21
申请号：EP22207655.6
申请日：2022-11-15
IPC分类号： G06F30/12 , G06F30/23 , G06F113/26
摘要： Systems and methods for semi-discrete modeling of progressive damage and failure in composite laminate materials are disclosed. An example method includes receiving, from a user, a fibrous strip width and a fibrous strip spacing, and creating a finite-element (FE) mesh by: generating, using a structured hex meshing algorithm, a plurality of fibrous strips along a fiber direction based on the fibrous strip width and the fibrous strip spacing, and generating, using a free hex-dominated advancing front meshing algorithm, a bulk element between each of the plurality of fibrous strips. The FE mesh may define a portion of a composite laminate material. The example method includes determining a predicted mechanical response of the composite laminate material by: generating a constitutive model corresponding to the composite laminate material based on the FE mesh, and inputting a stress value or a strain value to the constitutive model to generate the predicted mechanical response.
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5.发明公开
公开(公告)号：EP4181008A2
公开(公告)日：2023-05-17
申请号：EP22207656.4
申请日：2022-11-15
IPC分类号： G06F30/12 , G06F30/23 , G06F113/26
摘要： Systems and methods for semi-discrete modeling of delamination migration in composite laminate materials are disclosed. An example method includes receiving a specimen geometry and a specimen stacking sequence. The example method also includes creating a finite-element (FE) mesh that defines a composite laminate material by: generating, using a mesh generation tool, a plurality of plies shaped according to the specimen geometry, and connecting the plies together based on the stacking sequence by placing cohesive elements between each adjacent pair of plies. The example method also includes determining a predicted mechanical response of the composite laminate material by: generating a constitutive model corresponding to the composite laminate material based on the FE mesh, and inputting a strain value to the constitutive model to generate the predicted mechanical response.
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6.发明公开BLAST/IMPACT FREQUENCY TUNING AND MITIGATION 有权MINDERUNG DER EXPLOSIONS- / STOSSEINWIRKUNGSFREQUENZ
公开(公告)号：EP3069098A2
公开(公告)日：2016-09-21
申请号：EP14881432.0
申请日：2014-11-14
CPC分类号： F41H5/04 , B32B7/02 , B32B15/08 , B32B2250/03 , B32B2307/10 , B32B2571/00 , F41H1/04 , F42D5/045
摘要： A protective device and method of design to protect against multiple blast and impact events for use in any application in which a delicate target has to be protected. The protective device for mitigating the effects of blast or impact employs a first layer having a first acoustic impedance and a second layer having a second acoustic impedance. The second acoustic impedance is different than the first acoustic impedance. The second layer is proximate to the first layer. The first layer and the second layer are chosen collectively to tune the stress waves from the blast or impact events to one or more specific tuned frequencies. A third layer of a visco-elastic material is employed having a critical damping frequency that matches one or more specific tuned frequencies to dissipate the stress waves of the blast and impact event. The third layer is proximate to the second layer.
摘要翻译： 一种保护装置和设计方法，用于防止多种爆炸和冲击事件用于需要保护微妙目标的任何应用中。 用于减轻爆炸或冲击的影响的保护装置采用具有第一声阻抗的第一层和具有第二声阻抗的第二层。 第二声阻抗与第一声阻抗不同。 第二层靠近第一层。 共同选择第一层和第二层，以将来自爆炸或撞击事件的应力波调谐到一个或多个特定的调谐频率。 使用第三层粘弹性材料，其具有匹配一个或多个特定调谐频率的临界阻尼频率以消散爆炸和撞击事件的应力波。 第三层靠近第二层。
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