The Micromechanics Study of Fracture and Strength of Fiber Reinforced Composite Materials

纤维增强复合材料断裂与强度的微观力学研究

• 批准号: 62550051
• 负责人: SEKINE Hideki
• 金额: $ 1.09万
• 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: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62550051/
• 关键词: Composite Materials; Fracture; GFRP; Fracture Toughness; Low Temperature; Micromechanics; Acoustic Emission; 疲労; 破壊靭性; 微視破壊; アコースティック; エミッション

First we concerned with the fracture toughness of short glass fiber reinforecd SMC composites at low temperature. Fracture toughness tests were performed at temperatures 298K, 200K, 77K and 4K, and the acoustic emission (AE) signals corresponding to the microfracture of the SMC composites were detected during the tests. From the results of the spectrum analysis of the AE signals and the fractographic observation of the fractured surfaces, the microscopic fracture mechanism was considered. On the basis of this knowledge, a valuable formula for the estimation of fracture toughness of SMC composites at low temperature was presented.Secondly we dealt with the fatigue of the SMC composites. The microscopic fracture mechanism was also considered from the results of the spectrum analysis of the AE signals detected during the fatigue tests and the fractographic observation of the fractured surfaces. Consequently, a reasonable explanation of the microscopic fracture of the SMC composites under fatigue loading was presented.

首先，我们关注低温下短玻璃纤维增​​强SMC复合材料的断裂韧性。在298K，200K，77K和4K的温度下进行断裂韧性测试，并在测试期间检测到与SMC复合材料的微裂纹相对应的声发射（AE）信号。从AE信号的频谱分析结果和断裂表面的分形观察结果，考虑了微观断裂机制。根据这些知识，提出了低温下SMC复合材料断裂韧性的有价值的公式。首先，我们处理了SMC复合材料的疲劳。还从疲劳测试期间检测到的AE信号的频谱分析的结果和断裂表面的分裂观察结果中考虑了显微断裂机制。因此，提出了对SMC复合材料在疲劳载荷下的显微镜断裂的合理解释。

项目成果

Hideki Sekine: "The Micromechanics Study of Fracture of a Glass Fiber Reinforced SMC Composite under Fatigue Loading" Transactions of the Japan Society of Mechanical Engineers (A). 55. (1989)

Hideki Sekine：“疲劳载荷下玻璃纤维增​​强 SMC 复合材料断裂的微观力学研究”日本机械工程师学会会刊（A）。

関根英樹: 日本機械学会論文集(A編). 55. (1989)

Hideki Sekine：日本机械工程师学会会议记录（A 版）55。（1989 年）。

Hideki Sekine: "The Study of Fracture Toughness of Glass Fiber Reinforced Plastics at Low Temperature" Transactions of the Japan Society of Mechanical Engineers (A). 53. 1298-1306 (1987)

Hideki Sekine：《玻璃纤维增​​强塑料低温断裂韧性的研究》日本机械工程学会会刊（A）。

関根英樹: 日本機械学会論文週(A編). 55. (1989)

关根秀树：日本机械工程师学会论文周刊（A 版）55。（1989 年）。

関根英樹: 日本機械学会論文集(A編). 53. 1298-1306 (1987)

Hideki Sekine：日本机械工程师学会会议记录（A 版）53. 1298-1306 (1987)。