金属学报  1993, Vol. 29 Issue (6): 13-21

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粗糙度引入的Ⅱ型裂纹扩展的剪切阻力

郑冶沙;王中光;艾素华

中国科学院上海硅酸盐研究所;博士后;上海200050;中国科学院金属研究所材料疲劳与断裂国家重点实验室;中国科学院金属研究所材料疲劳与断裂国家重点实验室

ROUGHNESS-INDUCED SHEAR RESISTANCE OF MODE Ⅱ CRACK GROWTH

WANG Zhongguang;AI Suhua State Key Laboratory of Fatigue and Fracture for Materials; Institute of Metal Research; Academia Sinica; ShenyangZHENG Yessha;post-doctoral.Shanghai Institute of Coramics.Academia Sinica.Shnaghai 300050

郑冶沙;王中光;艾素华. 粗糙度引入的Ⅱ型裂纹扩展的剪切阻力[J]. 金属学报, 1993, 29(6): 13-21.
, , . ROUGHNESS-INDUCED SHEAR RESISTANCE OF MODE Ⅱ CRACK GROWTH[J]. Acta Metall Sin, 1993, 29(6): 13-21.

摘要 参考文献 相关文章 Metrics 全文: PDF(767 KB)   摘要: 通过混合(Ⅰ/Ⅱ)型疲劳裂纹扩展门槛值和裂纹闭合效应的测试.获得双相钢纯Ⅱ型疲劳门槛值是其纯Ⅰ型的1.9倍:其纯Ⅱ型分枝裂尖正应力强度因子范围为纯Ⅰ型的2.2倍说明由同一粗糙度引入裂纹面的剪切阻力,对Ⅱ型裂纹扩展的阻碍程度将大于此粗糙度诱导裂纹闭合效应,降低裂尖Ⅰ型有效驱动力的贡献,即粗糙度对Ⅱ型裂纹扩展的阻碍比对Ⅰ型的大Ⅱ型分量在近门槛值的疲劳裂纹生长过程中能够起两个重要的作用:(1)增大裂尖塑性以至加速裂纹生长;(2)引入裂纹表面接触以至减小裂纹扩展速率本文通过裂纹闭合效应的测试,定量估算了剪切阻力,Ⅱ型摩擦剪切应力强度因子范围(△K_(Ⅱ.f))要远远大于纯Ⅰ型的闭合应力强度因子范围(△K_(ICl)),说明粗糙度的引入加大了第二种作用,从Ⅱ型裂纹角度出发起到了屏蔽裂尖的功能. 关键词 ： 混合(I/H)疲劳裂纹扩展门槛值,  裂纹闭合,  粗糙度,  剪切阻力     Abstract：The mixed-mode (Ⅰ/Ⅱ) fatigue crack growth threshold was studied. The fa-tigue crack growth threshold value of pure mode Ⅱ in dual-phase steel(DPS) was found to be1.9 times of that of pure mode Ⅰ; the tensile stess strength factor range of pure mode Ⅱbranch crack tip is 2.2 times of that of pure mode Ⅰ. The roughness-induced shear resistanceimpedes the mode Ⅱ crack growth; while roughness-induced crack closure reduces the drivingforce of mode Ⅰ crack tip; the resistance of the former is larger than that of the latter. Themode Ⅱ component in near-threshold fatigue crack growth may increase the plasticity ofcrack tip which accelerates the crack growth and introduce crack surface contact and rub toreduce the crack propagation rate. The difficulty for quantifying the shear resistance is readilysolved through measurement of crack closure in this paper. The friction shear stress strengthfactor range of pure mode Ⅱ still is far larger than the closure stress strength factor range ofpure mode Ⅰ. It is illustrated that the roughness enlarged the second role and played a role ofshielding crack tip from mode Ⅱ crack. Key words： mixed-mode    fatigue crack growth threshold    crack closure    roughness    shear resistance 收稿日期: 1993-06-18      基金资助:国家自然科学基金 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 郑冶沙 王中光 艾素华 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1993/V29/I6/13 1 Gao H, Brown M W, Miller K J. Fatigue Engng Mater Struct, 1982; 5 (1) : 117 2 Wang K J, Hsu C L, Kao H. Proc I CFA, 1977; 4: 123--133． Pergamon press. 3 Gao H, Wang Z, Yang C, Zhou Z. Acta Metall. Sin, 1979; 15: 380--391． 4 Maccagno T M, Knott J F. Engng Fract Mech, 1989; 34 (1) : 65--86 5 Tanaka K. Engng Fract Mech, 1974; 6: 493 6 Liu H W. Fatigue Fract Engng Mater Struct, 1985; 8 (4) : 295--313 7 Gough H J. Edgar Margurg Lecture, Proc. ASTM 1133; 33 (part Ⅱ): 111． 8 Erdogan F, Sih G C. J Basic Engng (ASME Trans), 1963; 85: 519--527 9 K Hyashi, Nemat-Nasser S. J Appl Mech, 1981; 48: 520． 10 Sih G C. Int J Fracture, 1974: 10: 305--321． 11 Brown M W, Liu H W, Kfouri A P, Miller K I. Proc ICF5, 1980; 12: 891． Pergamon Press.R [1] 宋文硕, 宋竹满, 罗雪梅, 张广平, 张滨. 粗糙表面高强铝合金导线疲劳寿命预测[J]. 金属学报, 2022, 58(8): 1035-1043. [2] 张聪惠, 荣花, 宋国栋, 胡坤. 喷丸表面粗糙度对纯Ti焊接接头在HCl溶液中应力腐蚀开裂行为的影响[J]. 金属学报, 2019, 55(10): 1282-1290. [3] 郭军力, 文光华, 符姣姣, 唐萍, 侯自兵, 谷少鹏. 冷却速率对包晶钢凝固过程中包晶转变收缩的影响[J]. 金属学报, 2019, 55(10): 1311-1318. [4] 张亚娟, 王海滨, 宋晓艳, 聂祚仁. SLM球形Ni粉的制备与打印工艺性能[J]. 金属学报, 2018, 54(12): 1833-1842. [5] 朱莉娜,邓彩艳,王东坡,胡绳荪. 表面粗糙度对Ti-6Al-4V合金超高周疲劳性能的影响*[J]. 金属学报, 2016, 52(5): 583-591. [6] 王彬,熊良银,刘实. 射频反应溅射制备MgO二次电子发射薄膜*[J]. 金属学报, 2016, 52(1): 10-16. [7] 李微 陈振华 陈鼎 滕杰. 喷射沉积SiCp/Al-7Si复合材料的疲劳裂纹扩展[J]. 金属学报, 2011, 47(1): 102-108. [8] 朱明亮 轩福贞 朱奎龙 王国珍 贾天耀. 热处理对25Cr2NiMo1V钢疲劳特性的影响[J]. 金属学报, 2009, 45(3): 320-325. [9] 杨振国; 张继明; 李守新; 李广义; 王清远; 惠卫军; 翁宇庆 . 高周疲劳条件下高强钢临界夹杂物尺寸估算[J]. 金属学报, 2005, 41(11): 1136-1142 . [10] 唐武; 徐可为; 王平; 李弦 . Au/NiCr/Ta多层金属膜的表面粗糙度和纳米压入硬度的研究[J]. 金属学报, 2002, 38(5): 449-452 . [11] 白海力; 何忠杰; 田仁玉; 姜恩永 . 非理想软X射线光学多层膜的掠入射镜向反射率[J]. 金属学报, 2001, 37(2): 121-126 . [12] 李航月;胡奈赛;何家文;周惠久. 残余压应力场中裂纹扩展的闭合模型[J]. 金属学报, 1998, 34(8): 847-851. [13] 朱平;陈丙森. 系列示波冲击断口三维形貌几何特征和断裂性能[J]. 金属学报, 1998, 34(1): 63-69. [14] 王凤平;崔明启;王佩璇;方正知. 多层膜界面粗糙度的低角X射线衍射研究[J]. 金属学报, 1996, 32(7): 774-778. [15] 魏学军;李劲;柯伟. 小幅载荷在A537钢疲劳裂纹扩展过程中作用的研究[J]. 金属学报, 1996, 32(5): 504-509. Viewed Full text Abstract Cited   Shared      Discussed