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首页> 外文期刊>Journal of Applied Polymer Science >DAMAGE PROCESS MODELING ON SMC
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DAMAGE PROCESS MODELING ON SMC

机译：SMC上的损伤过程建模

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The damage processes taking place in SMC, which has been subjected to monotonically increasing tensile loads, are analyzed and the stress-strain curves are calculated. SMC is viewed as a laminate consisting of fiber bundles embedded in a resin/filler matrix. The stiffness of bundles and matrix is expected to be influenced by developing cracks, which lead to a reduction of the total stiffness of the SMC. Crack creation, and consequent bundle and matrix stiffness reduction, are viewed as a statistical process. The quadratic criterion in stress space and the maximum strain criterion are used to predict failure in the fiber bundles and in the matrix, respectively. Residual stresses resulting from the high curing temperatures, anisotropic fiber orientation, and varying content of filler particles in the matrix, inside and outside of the fiber bundles, are taken into account. The comparison of predicted stress-strain curves to experimental results, obtained on almost 20 different SMC materials, shows very good agreement, especially at elongations less than 1%. The model developed in this work allows us to appreciate quantitatively the influence of different material and processing parameters on the behavior of SMC, and in this way, to optimize its composition. (C) 1996 John Wiley & Sons, Inc. [References: 16]
机译：分析了单调增加的拉伸载荷在SMC中发生的损伤过程，并计算了应力-应变曲线。 SMC被视为由嵌入树脂/填料基体中的纤维束组成的层压板。预计束和基体的刚度会受到不断发展的裂纹的影响，从而导致SMC总刚度的降低。裂纹的产生以及随之而来的束和基体刚度的降低被视为一个统计过程。应力空间中的二次准则和最大应变准则分别用于预测纤维束和基体的破坏。考虑了由高固化温度，各向异性纤维取向以及纤维束内部和外部的基质中填料颗粒含量变化引起的残余应力。在几乎20种不同的SMC材料上获得的预期应力-应变曲线与实验结果的比较显示出非常好的一致性，尤其是在伸长率小于1％的情况下。通过这项工作开发的模型使我们能够定量地了解不同材料和加工参数对SMC行为的影响，并以此方式优化其成分。 （C）1996 John Wiley＆Sons，Inc. [参考：16]

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