| 塑性区模型损伤修正及其对声发射活动的影响 |
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| 引用本文： | 王慧晶,林哲.塑性区模型损伤修正及其对声发射活动的影响[J].船舶力学,2011,15(4):389-393. |
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| 作者姓名： | 王慧晶 林哲 |
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| 作者单位： | 大连理工大学船舶工程学院,辽宁,大连,116024;大连理工大学船舶工程学院,辽宁,大连,116024 |
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| 摘 要： | 文章采用损伤力学方法对Dugdale塑性区模型进行修正,研究损伤分布对裂尖塑性区的影响。修正的塑性区模型与Dugdale模型、Irwin模型进行了比较,结果令人满意。又通过该模型,研究声发射总计数N与应力强度因子K及塑性区半径ry之间的关系,与实验结果一致。说明可采用宏观变量ry来描述声发射活动中的微观损伤变化,有利于从多角度揭示产生声发射源的机理,适于工程应用。
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| 关 键 词： | 损伤 塑性区 声发射 |
Modification of plastic zone damage model and its effect on the Acoustic Emission Activities |
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| WANG Hui-jing,LIN Zhe.Modification of plastic zone damage model and its effect on the Acoustic Emission Activities[J].Journal of Ship Mechanics,2011,15(4):389-393. |
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| Authors: | WANG Hui-jing LIN Zhe |
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| Institution: | WANG Hui-jing,LIN Zhe(Department of Naval Architecture,Dalian University of Technology,Dalian 116024,China) |
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| Abstract: | A modified Dugdale plastic zone model is proposed using damage mechanics technique.Damage distributions in the region of crack tip are considered.Comparisons are made among the damage model,Dugdale plastic model and Irwin model.The results are satisfactory.Based on the modified model,the correlation of acoustic emission(AE) total counts N,stress intensity factor K and plastic zone size ry was made.Good agreement is observed by experiment.It is indicated that the micro-damage changes in the acoustic emission... |
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| Keywords: | damage plastic zone acoustic emission(AE) |
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