Representative volume element for parallel fiber bundles: Model and size convergence
Representative volume element for parallel fiber bundles: Model and size convergence
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DOI：
10.1016/j.compositesa.2016.04.018
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发表时间：
2016-08-01
影响因子：
8.7
通讯作者：
Reese, S.
中科院分区：
文献类型：
--
作者：
Stapleton, S. E.;Appel, L.;Reese, S.
纺织品的模拟通常发生在中尺度上，其中单个丝束被视为均匀的连续体。为了正确利用这些模型，需要纤维尺度模型来获得均匀化的丝束力学并考虑纤维尺度机制。目前的研究表明，一个有代表性的体积元（RVE）的平行纤维束使用离散元法（DEM）。提出了一种局部化、均匀化、边界条件和随机堆积生成的方法。对六种不同的载荷情况进行了RVE尺寸收敛研究。所有的加载情况下，存在一个RVE，最小的RVE，这代表了一个合理的响应包含162纤维。强调了在决定当前模型的可接受RVE尺寸时需要考虑的几个问题，包括加载速率、由于单个纤维滑动引起的响应波动以及由于初始纤维位置引起的样本间变化。(C)2016爱思唯尔有限公司版权所有。
The simulation of textiles often occurs at the meso scale, where the individual tows are treated as a homogeneous continuum. To properly utilize such models, fiber-scale models are required to obtain homogenized tow mechanics and consider fiber-scale mechanisms. The current study demonstrates a representative volume element (RVE) for parallel fiber bundles using the discrete element method (DEM). A method for localization, homogenization, boundary conditions, and random packing generation is presented. An RVE size convergence study was conducted for six different loading cases. An RVE existed for all loading cases, and the smallest RVE which represented a reasonable response contained 162 fibers. Several concerns were highlighted which need to be considered when deciding on an acceptable RVE size for the current model, including loading rate, undulations in the response due to individual fiber slippage, and specimen to specimen variation due to initial fiber positions. (C) 2016 Elsevier Ltd. All rights reserved.