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首页> 外文会议>TMS annual meeting exhibition >MODELLING SHEAR FRACTURE OF HYBRID CFRP/TI LAMINATES WITH COHESIVE ELEMENTS; EFFECTS OF GEOMETRY AND MATERIAL PROPERTIES
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MODELLING SHEAR FRACTURE OF HYBRID CFRP/TI LAMINATES WITH COHESIVE ELEMENTS; EFFECTS OF GEOMETRY AND MATERIAL PROPERTIES

机译：用粘性元素模拟混合CFRP / TI层压板的剪切断裂;几何形状和材料特性的影响

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The hybrid laminate made of Carbon Fibre Reinforced Plastic (CFRP) and metal foil plies (e.g. titanium) is being investigated numerically to be considered for future stiffer applications in aerospace industry. The numerical FE model of the hybrid laminate, subjected to lap shear fracture, is composed of a CFRP core embedded in between two titanium layers with cohesive elements lying within CFRP/Ti interface. In the FE model, the CFRP laminate is assumed as an orthotropic homogenized continuum under plane stress, and titanium facesheets are modelled as an elastic-plastic continuum. The constitutive law for the quadratic CFRP/Ti interface elements, implemented as User Element in ABAQUS, is an exponentially decaying law representing the degrading behaviour of the interface. The influence of geometry (e.g. overlap length and total length), and interface cohesive properties on the lap shear fracture response are analyzed in detail in this study. The numerical result will later be validated through related experiments.
机译：通过数控研究由碳纤维增强塑料（CFRP）和金属箔层（例如钛）制成的混合层压板和金属箔层（例如钛）。受圈剪切骨折的杂化层压材料的数值Fe模型由嵌入在两个钛层之间的CFRP芯构成，其中含有粘附的元素，位于CFRP / TI界面内。在Fe模型中，CFRP层压板被认为是平面应力下的正交均质连续体，并且钛面板被建模为弹性塑料连续体。在ABAQU中实现为用户元素的二次CFRP / TI接口元素的本构法是表示界面劣化行为的指数衰减的法律。在这项研究中，在本研究中详细分析了几何形状（例如重叠长度和总长度）和界面粘性性能的界面内聚性。稍后将通过相关实验验证数值结果。

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