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首页> 外文期刊>International journal of crashworthiness >Characterisation and modelling of short fibre reinforced polymers for numerical simulation of a crash
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Characterisation and modelling of short fibre reinforced polymers for numerical simulation of a crash

机译：用于碰撞数值模拟的短纤维增强聚合物的表征和建模

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摘要

To save costs, an early validation of functionality is necessary for the crash application of short fibre reinforced polymers by numerical simulation. For this an experimental determination of mechanical values and a numerical material model is essential. In this work the mechanical values of a short fibre reinforced polymer were determined at varied strain rates and in different directions under compression, shear and tension loading. With data of this experiments a new orthotropic-linear elastic and both orthotropic and strain rate dependent plastic material model is developed. It considers the hydrostatic pressure dependency of the hardening material and a failure which is influenced by directions, strain rates und multiaxial states of stresses. The validation of material model and characteristic mechanical values is conducted by simulations of determining experiments of the material behaviour as well as at dynamic impact tests.
机译：为了节省成本，必须通过数值模拟对短纤维增强聚合物的碰撞应用进行功能的早期验证。为此，必须对机械值和数值材料模型进行实验确定。在这项工作中，在压缩，剪切和拉伸载荷下，在不同的应变率和不同的方向上确定了短纤维增强聚合物的机械值。利用该实验的数据，开发了新的正交各向异性-线性弹性模型以及正交各向异性和应变率相关的塑性材料模型。它考虑了硬化材料的静水压力依赖性以及受方向，应变率和应力的多轴状态影响的破坏。材料模型和特征力学值的验证是通过模拟确定材料行为的实验以及在动态冲击试验中进行的。

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