806 均質化理論に基づくCFRP積層板のクリープ解析手法への繊維回転モデルの導入(OS9-(2)オーガナイズドセッション《複合材料の変形と破壊およびマルチスケール計算技術》)

概要

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In this study, a fiber rotation model is introduced into the creep analysis of Carbon Fiber-Reinforced Plastics (CFRP) laminates based on a homogenization theory, to predict the large strain creep behavior of the laminates. For this, a macroscopic elastic-viscoplastic constitutive relation of CFRP laminates is derived based on the time-dependent homogenization theory. Then, the angle of fiber rotation in each lamina induced by in-plane deformation of the laminate is described as a function of macroscopic strain. This fiber rotation angle is introduced into the above-mentioned macroscopic constitutive relation of laminates. Using the present method, the creep behavior of angle-ply carbon fiber/epoxy laminates (T800H/#3631) at an elevated temperature is analyzed. The analysis results for the angle-ply laminates [±45°] are in good agreement with experimental data, showing the validity of the present method and suggesting that the fiber rotation is one of the dominant factors for the creep behavior of angle-ply laminates.
一般社団法人日本機械学会の論文
2010-08-27