Development of Sysem for Three Dimensional Cracks and Damage

三维裂纹与损伤系统的开发

• 批准号: 08555168
• 负责人: ENOKI Manabu
• 金额: $ 8.06万
• 依托单位: Research Center for Advanced Science and Technology, The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555168/
• 关键词: Internal Damage; Ultrasonic; Acoustic Emission; Non-Destructive Evaluation; Microcrack; C; C Composites; SiC Reinforced glass; Si-Ti-C-O Ceramics; SiC粒子分散ガラス; ヒステリシスループ

Final fractures in ceramic composites occur after the accumulation of small cracks and damage inside of microstructure under loading. The objective of this research is to develop the equipment which can detect and evaluate these microfractures in three-dimensionally. We investigated the Si-Ti-C-O ceramics, C/C composites and SiC particle dispersed Pbo-B_2O_3-SiO_2 glass composites and measured AE characteristics and ultrasonic properties, AE source analysis of SiC/glass composites demonstrated that shear type micro cracks under 2Omum were dominant and internal microcracks were generated near final fracture. We developed thc three dimensional AE location algorithm including mechanical anisotropy due to fiber alignment and investigated the relationship between crack propagation and AE location. AE generated along the fiber direction and internal damage was evaluated by these results of AE analysis with crack propagation. The integrated system of ultrasonic and AE could defect the in-situ interval damage. Also laser AE system was developed to evaluate the microcracks in coating materials and CFRP.

陶瓷复合材料的最终断裂发生在加载条件下微结构内部的小裂纹和损伤的累积之后。本研究的目的是开发一种能够对这些微裂缝进行三维检测和评价的设备。本文研究了Si-Ti-C-O陶瓷、C/C复合材料和SiC颗粒分散的PbO-B_2 O_3-SiO_2玻璃复合材料的声发射特性和超声特性。本文提出了考虑纤维取向引起的力学各向异性的三维声发射定位算法，并研究了裂纹扩展与声发射定位之间的关系。通过这些裂纹扩展的AE分析结果，评价了沿纤维方向沿着产生的AE和内部损伤。超声与声发射的集成系统可以检测原位间隔损伤。同时，还开发了激光声发射系统，用于评价涂层材料和碳纤维复合材料中的微裂纹。

项目成果

B.-G.Kim,M.Enoki and T.Kishi: "Direct and Continuous Measurement of Depth-Dependent Reflection Coefficients of Rayleigh Waives for Surface Discontinuity" Normal Siot,Journal of the Acoustical Society of America. 104・5. 2733-2740 (1998)

B.-G.Kim、M.Enoki 和 T.Kishi：“表面不连续性瑞利波的深度相关反射系数的直接连续测量”Normal Siot，美国声学学会杂志 104・5。 2740 (1998)

B.K.Jang and T.Kishi: "Effect of Nano-Sized SiC and Micro-Sized YAG Dispersion on the Microstructure of Alumina" Journal of the Ceramic Society of Japan. 106・2. 138-143 (1998)

B.K.Jang 和 T.Kishi：“纳米尺寸 SiC 和微米尺寸 YAG 分散对氧化铝微观结构的影响”日本陶瓷学会杂志 106・2（1998 年）。

M.Enoki and T.Kishi: "Evaluation of Stochastic Microfracture Process of Pariticle Dispersed Composites" Materials Transactions,JIM. 37・3. 404-408 (1996)

M.Enoki 和 T.Kishi：“颗粒分散复合材料的随机微断裂过程的评估”材料交易，JIM 37・3（1996）。

A.Rabiei, B.-N.Kim, M.Enoki and T.Kishi: "A New-Method Based on Simultaneous Acoustic-Emission and insitu SEM Observation to Evaluate the Fracture-Behavior of Metal-Matrix Composites" Scripta Materialia. 37 (6). 801-808 (1997)

A.Rabiei、B.-N.Kim、M.Enoki 和 T.Kishi：“基于同步声发射和原位 SEM 观察来评估金属基复合材料断裂行为的新方法”Scripta Materialia。

B.-G.Kim,S.Lee,M.Enoki and T.Kishi: "Development and Application of Ultrasonic Transducer for Intensive Focusing of Rayleigh Waves" Ultrasonic. 36. 825-836 (1998)

B.-G.Kim、S.Lee、M.Enoki 和 T.Kishi：“用于瑞利波密集聚焦的超声波换能器的开发和应用”超声波。