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首页> 外文会议>2000 ASME International Mechanical Engineering Congress and Exposition November 5-10, 2000 Orlando, Florida >Strength Simulation of Woven Fabric Composite Materials With Material Nonlinearity Using Micromechanics Based Model
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Strength Simulation of Woven Fabric Composite Materials With Material Nonlinearity Using Micromechanics Based Model

机译：基于微力学模型的材料非线性机织织物复合材料强度模拟

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摘要

The objective of the current investigation is to predict failure strength of woven composition, which considers the two-dimensional extent of woven fabric, based on micro-mechanics. The formulation has an interface with nonlinear finite element codes. At each load increment, global stresses and strains are communicated to the representative cell and subsequently distributed to each subcell. Once stresses and strains are associated to a subcell they can be distributed to each constituent of the subcell (i.e. fill, warp, and resin). Consequently micro-failure criteria (MFC) are defined for each constituents of a subcell and the proper stiffness degradation is modeled. Different stages of failure such as warp transverse failure, fill transverse failure, failure of pure matrix in longitudinal and shear, shear failure in fill and warp, and fiber in fill and warp in longitudinal tension are considered. Good correlation is observed between the predicted and the experimental results presented in the published literature. This material model is suitable for implicit failure analysis under static loads and is being modified for explicit finite element codes to deal with problems such as crashworthiness and impact.
机译：当前研究的目的是基于微力学预测考虑织物的二维程度的织物组合物的破坏强度。该公式具有与非线性有限元代码的接口。在每个负载增量处，总应力和应变会传递到代表性单元，然后分配到每个子单元。一旦应力和应变与子电池相关联，便可以将其分配到子电池的每个组成部分（即填充，翘曲和树脂）。因此，为子电池的每个组成部分定义了微失效标准（MFC），并对适当的刚度退化进行了建模。考虑了不同的破坏阶段，例如经向横向破坏，填充横向破坏，纵向和剪切方向上的纯基体破坏，填充和经向方向上的剪切破坏以及纵向拉伸中的填充和经向方向的纤维破坏。在公开文献中给出的预测结果与实验结果之间观察到良好的相关性。该材料模型适用于静态载荷下的隐式故障分析，并且已针对显式有限元代码进行了修改，以处理诸如耐撞性和撞击性等问题。

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