| 疲劳与断裂中细观损伤的群体响应 |
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| 引用本文： | 洪友士.疲劳与断裂中细观损伤的群体响应[J].内蒙古工业大学学报,1997,16(3):2-8. |
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| 作者姓名： | 洪友士 |
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| 作者单位： | 中国科学院力学研究所非线性连续介质力学开放研究实验室!100080，北京 |
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| 基金项目： | 国家杰出青年科学基金，国家自然科学基金，中科院资助 |
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| 摘 要： | 实验中观察到，在疲劳短裂纹损伤阶段，损伤累积由众多的短裂纹萌生和发展而构成。对于韧性材料裂纹起始，实验中观察到裂尖前方孔洞群体损伤累积．依据损伤以群体方式发生和发展的特征，分别采用裂纹数密度守恒和孔洞数密度守恒的分析方法，探讨了疲劳短裂纹和裂尖前方孔洞群体损伤的演化过程和损伤累积行为。
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| 关 键 词： | 疲劳短裂纹 孔洞 群体损伤 裂纹数密度 损伤矩 |
COLONY RESPONSE OF MESO-DAMAGE IN FATIGUE AND FRACTURE |
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| Hong Youshi.COLONY RESPONSE OF MESO-DAMAGE IN FATIGUE AND FRACTURE[J].Journal of Inner Mongolia Polytechnic University(Social Sciences Edition),1997,16(3):2-8. |
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| Authors: | Hong Youshi |
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| Abstract: | It is proved by experiment that during the damage stage of short fatigue cracks,damageaccumulation is built up by the initiation and development of numerous short cracks. As tothe case of crack-cleavage in ductile material,void colony damage aecumulation at the front ofcrack tips is brought about. In the light of the characteristic that damage initiates and dcvel-ops in colonies,analytical methods of crack number density conservation and void numberdensity conservation are used respectively for the study of damage evolution process anddamage accumulation behavior of short fatigue cracks and void colonies at the front of cracktips. |
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| Keywords: | short fatigue crack void colony damage crack number density damage momentum |
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