元胞自动机法在裂纹愈合模拟中的应用
|
摘要
运用元胞自动机(CA)法,通过计算机编程建立了包含内部微裂纹的元胞自动机模型,结合金属材料学基本原理和动态再结晶理论,模拟了动态再结晶条件下的裂纹愈合过程。通过研究不同因素对裂纹愈合的影响,获得了不同参数(如应变速率、应变量等)下的裂纹愈合规律,阐明了裂纹的分段愈合特征,模拟结果与现有实验研究结果相吻合。
By the using of cellular automaton method, cellular automaton (CA) model with internal micro-cracks is established by computer programming. Combining the basic principle of metal materials with dynamic recrystallization theory, crack healing process has been simulated on the basis of dynamic recrystallization conditions. By studying the influence of different factors on the crack healing, crack healing law with different parameters(such as strain rate, strain, etc.) is got. Crack segment-healing characteristics are clarified, and the simulation results are consistent with existing experimental results.
By the using of cellular automaton method, cellular automaton (CA) model with internal micro-cracks is established by computer programming. Combining the basic principle of metal materials with dynamic recrystallization theory, crack healing process has been simulated on the basis of dynamic recrystallization conditions. By studying the influence of different factors on the crack healing, crack healing law with different parameters(such as strain rate, strain, etc.) is got. Crack segment-healing characteristics are clarified, and the simulation results are consistent with existing experimental results.
引文
[1]陈世佳.大锻件材料30Cr2Ni4MoV钢的热变形特性研究[D].上海:上海交通大学,2009.
[2]黄始全.7050铝合金锻造过程动态再结晶元胞自动机模拟[D].长沙:中南大学,2009.
[3]易幼平,刘超,黄始全.基于DEFORM-3D的7050铝合金动态再结晶元胞自动机模拟[J].中南大学学报,2010,41(5):1814-1821.
[4]何燕.金属材料动态再结晶过程的元胞自动机法数值模拟[D].大连:大连理工大学,2005.
[5]卢瑜.纯铜及纯镍动态再结晶过程的二维元胞自动机模拟[D].大连:大连理工大学,2007.
[6]焦宪友.基于元胞自动机的材料晶粒长大和再结晶模拟[D].济南:山东大学,2006.
[7]卢瑜,张立文,邓虎,等.纯镍动态再结晶过程的元胞自动机模型[J].塑性工程学报,2008,15(2):71-77.
[8]卢瑜,张立文,邓虎,等.纯铜动态再结晶过程的元胞自动机模拟[J].金属学报,2008,44(3):292-296.
[9]崔振山,徐秉业.大锻件内部空洞的锻合压下率[J].塑性工程学报,2005,12(3):6-12.
[10]崔振山,任广升,徐秉业,等.大锻件空洞的局部效应与锻合压下率研究[J].工程力学,2005,20(2):56-59.
[11]张海龙,杨君刚,孙军.工业纯铁内部穿晶疲劳微裂纹的扩散愈合过程[J].金属学报,2002,38(10):1015-1020.
[12]张海龙.工业纯铁内部疲劳微裂纹扩散愈合过程中形态演变[J].金属学报,2002,38(3):239-244.
[13]YANG J G,SUN J,ZHANG H L.Diffusive Healing of Internal Fatigue Micro-crack in Pure Titanium[J].Transactions of Nonferrous Metals Society of China(English Edition),2006,11(5):675-680.
[2]黄始全.7050铝合金锻造过程动态再结晶元胞自动机模拟[D].长沙:中南大学,2009.
[3]易幼平,刘超,黄始全.基于DEFORM-3D的7050铝合金动态再结晶元胞自动机模拟[J].中南大学学报,2010,41(5):1814-1821.
[4]何燕.金属材料动态再结晶过程的元胞自动机法数值模拟[D].大连:大连理工大学,2005.
[5]卢瑜.纯铜及纯镍动态再结晶过程的二维元胞自动机模拟[D].大连:大连理工大学,2007.
[6]焦宪友.基于元胞自动机的材料晶粒长大和再结晶模拟[D].济南:山东大学,2006.
[7]卢瑜,张立文,邓虎,等.纯镍动态再结晶过程的元胞自动机模型[J].塑性工程学报,2008,15(2):71-77.
[8]卢瑜,张立文,邓虎,等.纯铜动态再结晶过程的元胞自动机模拟[J].金属学报,2008,44(3):292-296.
[9]崔振山,徐秉业.大锻件内部空洞的锻合压下率[J].塑性工程学报,2005,12(3):6-12.
[10]崔振山,任广升,徐秉业,等.大锻件空洞的局部效应与锻合压下率研究[J].工程力学,2005,20(2):56-59.
[11]张海龙,杨君刚,孙军.工业纯铁内部穿晶疲劳微裂纹的扩散愈合过程[J].金属学报,2002,38(10):1015-1020.
[12]张海龙.工业纯铁内部疲劳微裂纹扩散愈合过程中形态演变[J].金属学报,2002,38(3):239-244.
[13]YANG J G,SUN J,ZHANG H L.Diffusive Healing of Internal Fatigue Micro-crack in Pure Titanium[J].Transactions of Nonferrous Metals Society of China(English Edition),2006,11(5):675-680.