| 一种韧性断裂损伤力学建模方法及其应用 |
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| 引用本文： | 张士宏,宋鸿武,徐勇,程明. 一种韧性断裂损伤力学建模方法及其应用[J]. 精密成形工程, 2011, 3(6): 27-32 |
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| 作者姓名： | 张士宏 宋鸿武 徐勇 程明 |
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| 作者单位： | 中国科学院金属研究所,沈阳,110016 |
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| 摘 要： | 基于连续损伤力学理论,综合考虑变形历史（温度、应变速率）对损伤的累积演化和临界损伤值的影响,提出了一种新的韧性断裂预测方法。建立了相应的韧性断裂准则,准确地预测了钛合金的热锻成形、镁合金的温热冲压成形和不锈钢板的液压成形过程中的破裂行为,表明该方法可以很好地用于存在变形历史的体积成形和板成形的成形极限预测。
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| 关 键 词： | 变形历史 累积损伤 断裂准则 体积成形 板成形 |
| 收稿时间： | 2011-10-10 |
| 修稿时间： | 2011-11-10 |
A New Modeling Approach of Ductile Damage Mechanics and Its Applications |
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| ZHANG Shi-hong,SONG Hong-wu,XU Yong and CHENG Ming. A New Modeling Approach of Ductile Damage Mechanics and Its Applications[J]. Journal of Netshape Forming Engineering, 2011, 3(6): 27-32 |
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| Authors: | ZHANG Shi-hong SONG Hong-wu XU Yong CHENG Ming |
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| Affiliation: | ZHANG Shi-hong,SONG Hong-wu,XU Yong,CHENG Ming (Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China) |
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| Abstract: | Based on continuum damage mechanical theory, a novel approach to predict ductile fractures was proposed considering the effect of deformation history including variations of temperature and strain rates and their distribution as well on cumulative damage evolution and critical damage value. Applications of the approach were discussed as examples in warm forming of Mg alloy sheets, hot forging of Ti alloys and hydraulic bulging of stainless steel sheet based on different ductile fracture criteria. The result... |
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| Keywords: | deformation history cumulative damage ductile fracture criteria bulk forming sheet metal forming |
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