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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Multi-scale modelling and analysis of strain rate dependent behaviour for long fibre reinforced thermoplastic based on X-ray computed tomography
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Multi-scale modelling and analysis of strain rate dependent behaviour for long fibre reinforced thermoplastic based on X-ray computed tomography

机译:基于X射线计算断层扫描的长纤维增强热塑性塑料应变速率依赖性行为的多尺度建模与分析

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This paper focuses on the multi-scale modelling method for strain rate dependent behaviour of long fibre reinforced thermoplastics based on the Mori-Tanaka scheme. In the present work, the anisotropic and nonlinear viscoelastic-viscoplastic behaviour of an injection moulded plate are experimentally characterised, and the sensitive range of strain rates is discussed. Fibre orientation tensors, content and fibre length are measured and analysed based on micro computed tomography images at different positions of the plate. Further, a multi-scale material model considering microstructure variables, constitutive models of two phases and failure criteria, is proposed. The accuracy of the model is validated by finite element simulations, including five strain rates and three loading directions. The comparison results indicate that the calculated stress-strain curves show a good consistency with the experimental data.
机译:本文重点介绍了基于Mori-Tanaka方案的长纤维增强热塑性塑料应变率依赖性行为的多尺度建模方法。在本作工作中,注射成型板的各向异性和非线性粘弹性 - 粘弹性行为是实验表征的,并且讨论了应变率的敏感范围。基于板的不同位置处的微计算断层摄影图像测量和分析纤维取向张量,含量和纤维长度。此外,提出了考虑微观结构变量的多尺度材料模型,两个阶段和故障标准的组成型模型。通过有限元模拟验证模型的准确性,包括五个应变率和三个加载方向。比较结果表明计算的应力 - 应变曲线与实验数据显示出良好的一致性。

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