间歇疲劳试验对盐岩疲劳特性的影响

doi:10.11779/CJGE201607003

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摘要通过间歇疲劳试验和传统疲劳试验的对比,研究了无应力间歇时间对盐岩疲劳特性的影响。经过间歇疲劳试验的盐岩试样与传统疲劳试样差异巨大。表现出的不同点主要有：①在相同的应力加载条件下,盐岩的间歇疲劳寿命与传统疲劳寿命相比缩短了50%以上;②间歇疲劳试验中间歇后的每个循环不可逆变形更大,不可逆变形的累计速率更快;且随着间歇时间的增加,变形越大,累计速率越快;③卸载弹性模量总体上逐渐增大,间歇疲劳试验中,卸载弹性模量随间歇时间的变长而增大。间歇疲劳的机理是：在盐岩内部缺陷发育生长时,缺陷周围由于屈服的时空顺序差异引起了应力应变的不协调响应,导致了残余应力;在残余应力作用下,晶粒内部产生的位错做反向运动,且间歇时间越长,反向运动距离越大;再次加载时,由于包申格效应,导致位错滑移引发的塑性变形更大。

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关键词 ：盐岩, 疲劳寿命, 塑性变形, 不协调响应, 残余应力

Abstract：The influence of no-stress intervals on the fatigue activities is studied by comparing the characteristics of the conventional fatigue tests with those of interval fatigue tests, which combine the cyclic stress and intervals with no stress. The samples from the interval fatigue tests and conventional fatigue tests present a large variety of differences caused by intervals: (1) Under the same conditions of stress, the fatigue lives of samples from the interval fatigue tests are lower more than 50 percent than those from the conventional fatigue tests; (2) The residual deformation of each stress period varies from the duration of interval and increases with it. The accumulated rate of plastic deformation behaves similarly to residual deformation; (3) In the mass, The unloading elastic modulus increases with the stress period number. This parameter of samples from the interval fatigue tests increases as the duration becomes longer. The mechanism of these phenomena is as follows: when the internal flaws develop and grow, the adjacent area yields in different spatial-temporal orders, resulting in uncoordinated response and the corresponding residual stress. Taking into account the Bauschinger effect, the plastic deformation will be larger in the following loading procedure.

Key words： salt rock fatigue life plastic deformation uncoordinate response residual stress

收稿日期: 2015-07-02

基金资助:高等学校博士学科点专项科研基金项目（20130191130003）；重庆市研究生科研创新项目；国家自然科学基金青年基金项目（51304256）

作者简介: 姜德义(1962- ),男,教授,博士生导师,主要从事岩土力学、采矿工程、安全工程方面的研究。E-mail: deyij@cqu.edu.cn。

引用本文:

姜德义, 范金洋, 陈结, 杨春和, 崔遥. 间歇疲劳试验对盐岩疲劳特性的影响[J]. 岩土工程学报, 2016, 38(7): 1181-1186. JIANG De-yi, FAN Jin-yang, CHEN Jie, YANG Chun-he, CUI Yao. Influence of interval fatigue tests on fatigue characteristics of salt rock. Chinese J. Geot. Eng., 2016, 38(7): 1181-1186.

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http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/10.11779/CJGE201607003 或 http://manu31.magtech.com.cn/Jwk_ytgcxb/CN/Y2016/V38/I7/1181

[1] FRANCO Zunino, JAVIER Castro, MAURICIO Lopez. Thermo-mechanical assessment of concrete microcracking damage due to early-age temperature rise[J]. Constr Build Mater, 2015, 81: 140-153.
[2] BAGDE M N, PEDROS V. Fatigue properties of intact sandstone samples subjected to dynamic uniaxial cyclical loading[J]. Int J Rock Mech Min, 2005, 42: 237-50.
[3] 姜德义, 范金洋, 陈结, 等. 盐岩在围压卸荷作用下的扩容特征研究[J]. 岩土力学, 2013, 34(7): 1881-1886. (JIANG De-yi, FAN Jin-yang, CHEN Jie, et al. Study on the characteristics of the salts capacity expansion under the action of confining pressure unloading[J]. Rock and Soil Mechanics, 2013, 34(7): 1881-1886. (in Chinese))
[4] 葛修润. 岩石疲劳破坏的变形控制律、岩土力学试验的实时X射线CT扫描和边坡坝基抗滑稳定分析的新方法[J]. 岩土工程学报, 2008, 30(1): 1-20. (GE Xiu-run. Deformation control law of rock fatigue failure, real-time X-ray CT scan of geotechnical testing, and new method of stability analysis of slopes and dam foundations[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(1): 1-20. (in Chinese))
[5] ZHAN Z X, HU W P, ZHANG M, et al. The fatigue life prediction for structure with surface scratch considering cutting residual stress, initial plasticity damage and fatigue damage[J]. Int J Fatigue, 2015, 74: 173-182.
[6] ZANG P, XU Jian-guang, NING L. Fatigue properties analysis of cracked rock based on fracture evolution process[J]. J Cent South Univ T, 2008, 15: 95-9.
[7] DHOUHA Mellouli, NADER Haddar, ALAIN Koster, et al. Hardness effect on thermal fatigue damage of hot-working tool steel[J]. Eng Fail Anal, 2014, 45: 85-95.
[8] 祝效华, 罗衡, 贾彦杰. 考虑岩石疲劳损伤的空气冲旋钻井破岩数值模拟研究[J]. 岩石力学与工程学报, 2012, 31(4): 754-761. (ZHU Xiao-hua, LUO Heng, JIA Yan-jie. Numerical analysis of air hammer bit drilling based on rock fatigue model[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(4): 754-761. (in Chinese))
[9] 肖建清. 循环荷载作用下岩石疲劳特性的理论与试验研究[D]. 长沙: 中南大学, 2009. (XIAO Jian-qing. Theoretical and experimental investigation on fatigue properties of rock under cyclic loading[D]. Changsha: Central South University, 2009. (in Chinese))
[10] 姜德义, 范金洋, 陈结, 等. 围压卸载速率对盐岩扩容损伤影响研究[J]. 岩石力学与工程学报, 2013, 32(增刊2): 3154-3159. (JIANG De-yi, FAN Jin-yang, CHEN Jie, et al. Research on capacity expansion damage of the salt under the different rates of confining pressure unloading[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(S2): 3154-3159. (in Chinese))
[11] REN Song, BAI Yue-ming, ZHANG Jing-peng, et al. Experimental investigation of the fatigue properties of salt rock[J]. Int J Rock Mech Min, 2013, 64: 68-72.
[12] ERARSLAN N, WILLIAMS D J. Mechanism of rock fatigue damage in terms of fracturing modes[J]. Int J Fatigue, 2012, 43: 76-89.
[13] KITTITEP Fuenkajorn, DECHO Phueakphum. Effects of cyclic loading on mechanical properties of Maha Sarakham salt[J]. Eng Geol, 2012, 112: 43-52.
[14] 任建喜, 蒋宇, 葛修润. 单轴压缩岩石疲劳寿命影响因素试验分析[J]. 岩土工程学报, 2005, 27(11): 47-50. (REN Jian-xi, JIANG Yu, GE Xiu-run. Test and analysis on rock fatigue life due to affecting factors under uniaxial compression[J]. Chinese Journal of Geotechnical Engineering, 2005, 27(11): 47-50. (in Chinese))
[15] REN Song, BAI Yue-ming, ZHANG Jing-peng, et al. Experimental investigation of the fatigue properties of salt rock[J]. Int J Rock Mech Min, 2013, 64: 68-72.
[16] 纪文栋, 杨春和, 姚院峰, 等. 应变加载速率对盐岩力学性能的影响[J]. 岩石力学与工程学报, 2011, 30(12): 2507-2513. (JI Wen-dong, YANG Chun-he, YAO Yuan-feng, et al. Effects of loading strain rate on mechanical performances of salt rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(12): 2507-2513. (in Chinese))
[17] KITTITEP Fuenkajorn, DECHO Phueakphum. Effects of cyclic loading on mechanical properties of Maha Sarakham salt[J]. Eng Geol, 2012, 112: 43-52.
[18] 姜德义, 范金洋, 陈结, 等. 应力因素下的岩盐卸荷扩容试验研究[J]. 岩土力学, 2013, 34(增刊1): 41-46. (JIANG De-yi, FAN Jin-yang, CHEN Jie, et al. Test study of unloading capacity expansion characteristics of salt rock under stress factors[J]. Rock and Soil Mechanics, 2013, 34(S1): 41-46. (in Chinese))
[19] 刘建锋, 徐进, 杨春和, 等. 盐岩拉伸破坏力学特性的试验研究[J]. 岩土工程学报, 2011, 33(4): 580-586. (LIU Jian-feng, XU Jin, YANG Chun-he, et al. Mechanical characteristics of tensile failure of salt rock[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(4): 580-586. (in Chinese))
[20] 姜德义, 王雷, 陈结, 等. 损伤盐岩短期自恢复特性试验研究[J]. 岩土工程学报, 2015, 37(4): 594-600. (JIANG De-yi, WANG Lei, CHEN Jie, et al. Experimental research on properties of short-term self recovery of damaged salt rock[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(4): 594-600. (in Chinese))
[21] 姜德义, 范金洋, 陈结, 等. 盐岩的压剪疲劳特性与位错损伤研究[J]. 岩石力学与工程学报, 2015, 34(5): 1-12. (JIANG De-yi, FAN Jin-yang, CHEN Jie, et al. Research on salt rock compression-shear fatigue properties and dislocation damage[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(5): 1-12. (in Chinese))
[22] 周扬. 静压开口混凝土管桩残余应力的理论分析与试验研究[D]. 杭州: 浙江大学, 2014. (ZHOU Yang. Theoretical analysis and experimental studies on residual stress of jacked open-ended concrete pipe piles[D]. Hangzhou: Zhejiang University, 2014. (in Chinese))
[23] 权磊, 田波, 牛开民, 等. 切缝法测定水泥混凝土路面残余应力数值模拟分析[J]. 土木工程学报, 2014(6): 118-125. (QUAN Lei, TIAN Bo, NIU Kai-min, et al. Numerical analysis of notch-cutting method for determining the residual stress in PCC Slab[J]. China Civil Engineering Journal, 2014(6): 118-125. (in Chinese))
[24] 赵锐. 焊接残余应力的数值模拟及控制消除研究[D]. 大连: 大连理工大学, 2006. (ZHAO Rui. Study of welding residual stress's numerical simulation and relieving[D]. Dalian: Dalian University of Technology, 2006. (in Chinese))