Abstract

This paper presents the application of eigendeformation technique for multiscale analysis of 3D carbon–carbon (C/C) composite. Methodology for eigendeformation technique has been taken from the work of Oskay and Fish. It involves the determination of influence functions for the elastic case and damage conditions from the representative volume element (RVE). The constitutive law for 3D C/C composite in the presence of damage has been determined. Damage in the carbon fiber bundle, matrix and interface has been modeled. The methodology has been extended using VUMAT subroutine for carrying out a multiscale analysis of 3D C/C composite. The multiscale simulation was carried out for an open hole test on 3D C/C composite, and the results were compared with experiment. Strain distribution and failure loads obtained using multiscale simulation and experiments were found to be in good agreement.

中文翻译：

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利用特征变形技术对3D碳-碳复合材料进行均质化和多尺度分析

摘要

本文介绍了本征变形技术在3D碳-碳（C / C）复合材料多尺度分析中的应用。本征变形技术的方法学是从奥斯卡（Oskay）和菲什（Fish）的工作中获得的。它涉及根据代表性体积元素（RVE）确定弹性情况的影响函数和损坏条件。确定了存在损坏时3D C / C复合材料的本构定律。碳纤维束，基体和界面的损坏已建模。该方法已使用VUMAT子例程扩展，可对3D C / C复合材料进行多尺度分析。对3D C / C复合材料进行了裸眼测试的多尺度模拟，并将结果与​​实验进行了比较。