论文标题
在连续纤维复合材料的随机框架中，体积分数和纤维分布对应力转移的影响：一项微机械研究
Effect of Volume Fraction and Fiber Distribution on Stress Transfer in a Stochastic Framework of Continuous Fiber Composite: A Micromechanical Study
论文作者
论文摘要
在纤维增强复合材料（FRC）中，纤维破裂是一种常见现象，导致应力浓度。这种高应力在断裂附近转移，这是通过应力转移系数（STC）量化的。在本文中，试图检查纤维体积分数的效果以及纤维对STC和无效长度的分布。考虑三种情况，更改了纤维体积分数：1）通过更改纤维的数量，2）通过更改代表体积元件（RVE）的维度（RVE）和3）通过更改纤维半径。 rve的尺寸变化以及纤维半径，纤维的周期性和半随机布置的变化。从随机和半随机排列的每个体积分数的200个RVE分析中，即使纤维布置遵循正态分布，STC的分布也不遵循任何标准分布。纤维横截面尺寸在恢复纤维破裂的强度中起着至关重要的作用。考虑到纤维断裂的应力转移，可以说纤维的周期排列在随机排列中是有益的。
In fiber Reinforced Composites (FRC) fiber breakage is a common phenomenon resulting in stress concentration. This high stress gets transfer in the vicinity of the breakage which is quantified by Stress Transfer Coefficient (STC). In this paper, an attempt is made to check the effect of fiber volume fraction and the distribution of the fibers on STC and ineffective length. The fiber volume fraction is changed considering three cases: 1) by changing the number of fibers, 2) by changing the dimension of the Represntative Volume Element (RVE) and 3) by changing the fiber radius. Cases with change in dimension of RVE and change in fiber radius, periodic and semi-random arrangents of fibers are considered. From the analysis of 200 RVE's for each volume fraction in random and semi-random arrangements, it is observed that the distribution of STC does not follow any standard distribution, even if the fiber arrangement follows the normal distribution. The fiber cross-sectional dimension plays a critical role in regaining the broken fiber strength. The periodic arrangement of fibers can be said to be beneficial over the random arrangement considering the stress transfer from the broken fiber.
