金属学报  2007, Vol. 43 Issue (10): 1037-1042

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空穴长大延性损伤新模型

赵震;谢晓龙;李明辉

上海交通大学 塑性成形工程系; 上海 200030

赵震; 谢晓龙; 李明辉 . 空穴长大延性损伤新模型[J]. 金属学报, 2007, 43(10): 1037-1042 .

摘要 参考文献 相关文章 Metrics 全文: PDF(546 KB)   摘要: 金属材料在复杂应力状态下的延性损伤与断裂是金属塑性成形领域的难点之一。本文以45中碳钢为研究对象，进行了拉伸、压缩、扭转、精冲试验，并结合有限元对各实验过程中的应力三轴度和延性损伤进行了分析，提出了金属材料的三种延性损伤机理：无空穴影响剪切损伤、剪切型空穴损伤和拉伸型空穴损伤。在此基础上，提出了一个新的基于空穴长大的延性损伤模型，能够较准确地预测材料拉伸、精冲过程中延性断裂的出现，扩大了损伤模型的预测范围。 关键词 ： 空穴,  应力三轴度,  延性损伤,  延性断裂     Abstract：The ductile damage and fracture in metallic materials under complex stress state is one of most difficult problems in metal forming. Tensile test, compression test, torsion test, and fine-blanking test of 45 steel were performed, and the stress triaxiality and ductile damage of each test are analyzed with FEM. Furthermore, three ductile damage mechanisms were proposed, which are shear damage without the influence of voids, shear-form void damage and tensile-form void damage. Based on above discovery, a new ductile damage model based on void growth was proposed, which can predict the occurrences in tension and fine-blanking of metallic materials accurately. Key words： void    stress triaxiality    ductile damage    ductile fracture 收稿日期: 2007-01-26      ZTFLH:  TG386   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 赵震 谢晓龙 李明辉 44.8K 链接本文: https://www.ams.org.cn/CN/Y2007/V43/I10/1037 [1]Freudenthal A M.The Inelastic Behavior of Engineering Materials and Structures.New York:Wiley,1950 [2]Cockroft M,Latham D.J Inst Met,1968;96:33 [3]Oh S I,Chen C C,Kobayashi S.Trans ASME,1979;101: 36 [4]Brozzo P,de Luca B,Rendina R.Proc 7th Biennial Conf IDDRG,Amsterdam:IDDRG,1972:31 [5]Yu Z Q.PhD Dissertation,Harbin:Harbin Institute of Technology,2003 (于忠奇．哈尔滨工业大学博士学位论文，2003) [6]Rice J R,Tracey D M.J Mech Phys Solid,1969;17:201 [7]Oyane M,Sato T,Okimoto K,Shima S.J Mech Phys Solid,1969;17:201 [8]McClintock F A.J Appl Mech,1968;35:363 [9]Zheng C Q,Zhou L,Zhang K S.Study on Metal Toughness Damage and its Application.Beijing:National Defence Industry Press,1995 (郑长卿，周利，张克实．金属韧性破坏的细观力学及其研究应用．北京：国防工业出版社，1995)f [1] 郭万林; 董蕙茹; 杨政; 路民旭; 赵新伟; 罗金衡 . 厚度与分层耦合效应对X60管线钢断裂韧性的影响[J]. 金属学报, 2001, 37(4): 386-390 . [2] 周利;苟文选. 钢的韧脆转变过程与临界空穴扩张状态[J]. 金属学报, 1996, 32(10): 1063-1067. [3] 周利;郑长卿;卢智先;丁富连. BHW60钢的临界空穴扩张状态与相关的断裂韧性[J]. 金属学报, 1993, 29(8): 44-48. [4] 府治平;吕东梁;詹千宝;周继程. GaAs中空穴陷阱A,B能级的热力学性质[J]. 金属学报, 1992, 28(5): 59-63. Viewed Full text Abstract Cited   Shared      Discussed