Please wait a minute...
工程设计学报
工程设计学报  2016, Vol. 23 Issue (1): 22-27    DOI: 10.3785/j.issn.1006-754X.2016.01.004
保质设计     
应力场强法中场径参数的研究
申杰斌, 唐东林
西南石油大学 机电工程学院, 四川 成都 610500
Study of field size parameter in stress field intensity approach
SHEN Jie-bin, TANG Dong-lin
Institute of Electrical and Mechanical Engineering, Southwest Petroleum University, Chengdu 610500, China
 全文: PDF(1484 KB)   HTML
摘要： 针对应力场强法中场径计算方法存在争议且不易求取的问题,基于应力场强法假设,研究了场径参数计算方法的理论依据;在考虑场径求取可行性的基础上,提出一种在任意载荷条件下确定试件场径的方法.给出了场径的求取步骤,选取6块不同应力集中系数的缺口试件在4种应力比下,按照步骤求取场径.对场径计算结果拟合并作图,由图所示分析影响场径大小的因素.得出结论:在相同应力比下,场径与应力集中系数呈很强的线性关系;在相同应力集中系数下,场径与应力比呈很强的二次曲线关系.通过实例对所提出的方法进行了验证,结果表明:由提出方法确定的场径计算得出的疲劳寿命更贴近于试验寿命,在保证安全的基础上提高了疲劳寿命预测的准确性.
关键词： 应力场强法;  场径;  应力集中系数;  应力比;  疲劳寿命预测    
Abstract: Aiming at problems that the calculation method of the field size parameter of the stress field intensity was controversial and difficult to obtain, the theoretical basis of calculation approach of field size parameter was researched based on the assumption of the stress field intensity approach. Considering the calculation approach's feasibility, a approach for determining the field size of component under arbitrary loading conditions was proposed. By given the calculating steps of the field size, the field size for 6 selected notched specimens with different stress concentration factors in 4 kinds of stress ratio was calculated. The figures were fitted by field size calculation results. By analyzing factors which affected the field size according to the figure, conclusions were as follows: field size had a strong linear relationship with the stress concentration factor under the same stress ratio, field size had a strong quadratic curve relationship with the stress ratio under the same stress concentration factor. The calculation approach of the field size parameter was verified through an example. The results showed that the fatigue life determined by the approach proposed was more close to the experiment life, and it improved the accuracy of life prediction on the basis of security.
Key words: stress field intensity approach    field size    stress concentration factor    stress ratio    fatigue life prediction
收稿日期: 2015-06-26 出版日期: 2016-02-28
CLC:  O346.2  
通讯作者: 唐东林,教授,硕士生导师,E-mail:tdl840451816@163.com.     E-mail: tdl840451816@163.com
作者简介: 申杰斌(1991-),男,四川绵阳人,硕士生,从事石油装备疲劳可靠性研究,E-mail:2081703017@qq.com.
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　　

引用本文:

申杰斌, 唐东林. 应力场强法中场径参数的研究[J]. 工程设计学报, 2016, 23(1): 22-27.

SHEN Jie-bin, TANG Dong-lin. Study of field size parameter in stress field intensity approach. Chinese Journal of Engineering Design, 2016, 23(1): 22-27.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn.1006-754X.2016.01.004    或    https://www.zjujournals.com/gcsjxb/CN/Y2016/V23/I1/22

[1] 姚卫星.金属材料疲劳行为的应力场强法描述[J].固体力学学报,1997,18(1):38-48. YAO Wei-xing.Metal material fatigue behavior description of the stress field intensity method[J].Acta Mechanica Solida Sinica,1997,18(1):38-48.

[2] 郭海丁,武奇.基于场强法的平板法兰角焊缝接头的疲劳寿命估算方法[J].航空动力学报,2008,23(6):1082-1086. GUO Hai-ding,WU Qi.Way to evaluate fatigue life of fillet weld of plate with flange based on stress field intensity[J].Journal of Aerospace Power,2008,23(6):1082-1086.

[3] 尚德广,王大康,李明,等.随机疲劳寿命预测的局部应力应变场强法[J].机械工程学报,2002,38(1):67-70. SHANG De-guang,WANG Da-kang,LI Ming,et al.Random fatigue life prediction of local stress-strain field intensity method[J].Chinese Journal of Mechanical Engineering,2002,38(1):67-70.

[4] 熊伟红,向晓东,喻青.基于局部应力应变法的桥式起重机用钢丝绳疲劳寿命估算[J].机械科学与技术,2015,34(1):47-50. XIONG Wei-hong,XIANG Xiao-dong,YU Qing.Fatigue life prediction of bridge crane wire rope based on local stress-strain method[J].Mechanical Science and Technology for Aerospace Engineering,2015,34(1):47-50.

[5] 周炜,周鋐,冯展辉.应用局部应力-应变法估算机械疲劳寿命[J].同济大学学报(自然科学版),2001,29(8):928-931. ZHOU Wei,ZHOU Hong,FENG Zhan-hui.Use of local stress-strain method in fatigue life prediction of grab bucket conveyer[J].Journal of Tongji University (Natural Science),2001,29( 8):928-931.

[6] 聂宏,常龙.基于局部应力应变法估算高周疲劳寿命[J].南京航空航天大学学报,2000,32(1):75-79. NIE Hong,CHANG Long.High-cycle fatigue life prediction of local stress-strain method[J].Journal of Nanjing University of Aeronautics & Astronautics,2000,32(1):75-79.

[7] 安刚,龚鑫茂.随机振动环境下结构的疲劳失效分析[J].机械科学与技术,2000,19(S1):40-42. AN Gang,GONG Xin-mao.The fatigue failure analysis of the structure under random vibration environment[J].Mechanical Science and Technology for Aerospace Engineering,2000,19(S1):40-42.

[8] 李德勇,姚卫星.缺口件振动疲劳寿命分析的名义应力法[J].航空学报,2011,32(11):2036-2041. LI De-yong,YAO Wei-xing.Nominal stress approach for life prediction of notched specimens under vibration loading[J].Acta Aeronautica et Astronautica Sinica,2011,32(11):2036-2041.

[9] 郑立春,姚卫星.疲劳裂纹形成寿命预测方法综述[J].力学与实践,1996,18(4):10-15. ZHENG Li-chun,YAO Wei-xing.Review of fatigue crack initiation life prediction methods[J].Mechanics in Engineering,1996,18(4):10-15.

[10] 郭平,陈波华,都昌兵.基于场强法的燃烧室机匣后衬套安装座疲劳寿命预测[J].航空发动机,2011,37(6):36-39. GUO Ping,CHEN Bo-hua,DU Chang-bin.Based on the approach of field intensity combustion chamber for bushing after installation of the fatigue life prediction[J].Journal of Aircraft Engine,2011,37(6):36-39.

[11] 董志航,廖志忠.理论应力集中系数的有限元求法[J].航空兵器,2005,2(3):15-18. DONG Zhi-hang,LIAO Zhi-zhong.Theoretical stress concentration factor of the finite element method[J].Aero Weaponry,2005,2(3):15-18.

[12] 姚卫星.结构疲劳寿命分析[M].北京:国防工业出版社,2003:96-98. YAO Wei-xing.Fatigue life prediction of structures[M].Beijing:National Defense Industry Press,2003:96-98.

[13] 李舜酩.机械疲劳与可靠性设计[M].北京:科学出版社,2006:62-63. LI Shun-ming.Mechanical fatigue and reliability design[M].Beijing:Science Press,2006:62-63.

[14] 高镇同.航空金属材料疲劳性能手册[M].北京:北京航空材料研究所,1981:97-100. GAO Zhen-tong.Aviation metal material fatigue performance handbook[M].Beijing:National Defense Industry Press,1981:97-100.

[15] 陈健,崔海涛,温卫东.基于应力场强法的缺口构件疲劳寿命预测方法研究[J].长春理工大学学报(自然科学版),2010,33(4):87-91. CHEN Jian,CUI Hai-tao,WEN Wei-dong.Study on notch specimen fatigue life prediction of stress field intensity method[J].Journal of Changchun University of Science and Technology (Natural Science Edition),2010,33(4):87-91.
[1] 郝春永, 王栋亮, 郑津洋, 徐平, 顾超华. 铝内胆复合材料储氢瓶爆破压力与疲劳寿命关系研究[J]. 工程设计学报, 2021, 28(5): 594-601.
[2] 刘 喆，陶凤和，贾长治. 履带车辆传动轴疲劳寿命预测与结构改进[J]. 工程设计学报, 2015, 22(5): 431-437.
[3] 陈容, 黄宁. 一种理论应力集中系数的有效算法研究[J]. 工程设计学报, 2010, 17(3): 215-218.
[4] 亓秀梅, 高创宽. 轴类零件应力集中系数的理论研究[J]. 工程设计学报, 2002, 9(1): 7-11.