A Micromechanics Study on Short Fiber Reinforced Composites

短纤维增强复合材料的微观力学研究

• 批准号: 04650077
• 负责人: SEKINE Hideki
• 金额: $ 0.45万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650077/
• 关键词: Composite; Micromechanics; Nonlinear Behavior; Load Carrying Capacity; Microfracture; Computational Simulation; Stress Corrosion; Crack Propagation Rate; 微視破壊; 数値シミュレーション; 酸環境

The micromechanics study on short fiber reinforced composites was made.1. Microfractures and Nonlinear Behaviors of Short Fiber Reinforced CompositesThe damage formation mechanism in short fiber reinforced plastics, metal and ceramics was first considered, and was modeled in order to simulate the fracture behaviors. By means of the computational simulation, the load carrying capacity of short fiber reinforced composites was predicted. The influences of fiberorientation, fiber geometry and fiber-matrix interfacial conditions on the fracture energy were also examined in detail.2. Propagation Rate of a Stress Corrosion Crack in Short Fiber Reinforced SMC CompositesStress corrosion crack tests were carried out on compact tension specimens made from a glass short fiber reinforced SMC composite in acid environment. Then, it was verified that the crack propagation rate da/dt is approximately expressed against the stress intensity factor KAPPA at crack tip in the form da/dt=ALPHA^m where A and m are constans. This relationship was examined from the viewpoint of micromechanics, and the influences of concentration of acid, temperature and fiber volume fraction on the propagation rate were clarified quantitatively. Furthermore, the numerical simulation of the extension behavior of the stress corrosion crack in a glass fiber was performed by using the three-dimensional BEM.

对短纤维增强复合材料的微力学研究。1。首先考虑了短纤维增强型损伤形成机制的微裂缝和非线性行为，首先考虑了短纤维增强塑料，金属和陶瓷的作用，并进行了建模以模拟断裂行为。通过计算模拟，预测了短纤维增强复合材料的负载能力。还详细研究了光纤，纤维几何形状和纤维 - 纤维界面条件对骨折能量的影响。2。短纤维增强的SMC组合腐蚀裂纹测试中应力腐蚀裂纹的繁殖速率，对由玻璃短纤维增强的SMC复合材料制成的紧凑张力样品在酸环境中进行。然后，经过证实，裂纹的传播速率da/dt大约针对裂纹尖端的应力强度因子kappa以da/dt = alpha^m的形式表示，其中a和m是constans。从微力学的角度检查了这种关系，并定量阐明了酸，温度和纤维体积分数对传播速率的影响。此外，使用三维BEM进行了玻璃纤维中应力腐蚀裂纹的延伸行为的数值模拟。

项目成果

H.Suzuki, H.Sekine and K.Yamada: "Numerical Prediction of the Strength Deterioration of Short Glass Fiber Reinforced Thermoplastics by a Slight Amount of Inorganic Addition Agent" Proceedings of the 71st JSME Spring Annual Meeting. 940-10, Vol.II. 402-404

H.Suzuki、H.Sekine 和 K.Yamada：“少量无机添加剂对短玻璃纤维增​​强热塑性塑料强度劣化的数值预测”第 71 届 JSME 春季年会论文集。

H.Sekine and M.Ogata: "Computational Simulation of Nonlinear Stress-Strain Behavior of Short-Fiber Reinforced Metal Matrix Composites" Proceedings of the 17th Symposium on Composite Meterials. 71-74 (1992)

H.Sekine 和 M.Ogata：“短纤维增强金属基复合材料非线性应力-应变行为的计算模拟”第 17 届复合材料研讨会论文集。

H.Suzuki: "Tension-Softening Relation and Fracture Energy of Short-Fiber Reinforced Composites" Proceedings of the Sixth Japan-U.S. Conference on Composite Materials. 825-833 (1993)

H.Suzuki：“短纤维增强复合材料的张力软化关系和断裂能”第六届日美复合材料会议论文集。

関根 英樹: "短繊維強化金属基複合材料の非線形応力-ひずみ挙動のコンピュータ・シミュレーション" 日本複合材料学会 第17回複合材料シンポジウム講演要旨集. 71-74 (1992)

Hideki Sekine：“短纤维增强金属基复合材料非线性应力应变行为的计算机模拟”日本复合材料学会第十七届复合材料研讨会摘要71-74（1992）。

H.Suzuki and H.Sekine: "Tension-Softening Relation for Short-Fiber-Reinforced Composites and its Application" Proceedings of the 70th JSME Fall Annual Meeting. 920-78, Vol.B. 213-215 (1992)

H.Suzuki 和 H.Sekine：“短纤维增强复合材料的张力软化关系及其应用”第 70 届 JSME 秋季年会论文集。