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Influence of geometry, elasticity properties and boundary conditions on the Mode I purity in sandwich composites

机译：几何形状，弹性特性和边界条件对三明治复合材料I型纯度的影响

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摘要

The present work addresses the problem of skin/core debonding in sandwich materials. The main goal is to carry out parametric analyses for studying the influence of various materials, geometrical parameters and boundary conditions of sandwich fracture specimens such as a Single Cantilever Beam and a Double Cantilever Beam on the skin/core opening (K-I) and shearing (K-II) modes. The analyses have been performed by means of fracture mechanics tools implemented into the commercial finite element code ABAQUS (TM). A two-dimensional model of the fracture specimens has been developed with plane strain finite elements. The dependence of the stress intensity factors in the sandwich specimens on the skin thickness, ratio between the Young's moduli of the skin and core materials and boundary conditions imposed on the specimens has been examined under quasi-static loading by using the interaction integral method.
机译：本工作解决了夹心材料中的表皮/芯层剥离的问题。主要目标是进行参数分析，以研究夹层破裂样品（如单悬臂梁和双悬臂梁）的各种材料，几何参数和边界条件对皮/芯开口（KI）和剪切力（K -II）模式。已经通过在商业有限元代码ABAQUS（TM）中实施的断裂力学工具进行了分析。用平面应变有限元建立了一个断裂试样的二维模型。通过使用相互作用积分方法，在准静态载荷下研究了夹层样品中应力强度因子对表皮厚度，表皮和芯材的杨氏模量之比以及施加在样品上的边界条件的依赖性。

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