反复加载下PVC建筑膜材的应力松弛行为
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摘要
为进一步研究膜材的松弛性能,对PVC膜材的反复应力松弛性能进行了测试,并讨论了初始松弛应力、松弛次数、单次松弛时间对残余应力、反复应力松弛率和反复应力松弛速率的影响。分析结果表明:残余应力随松弛次数和初始松弛应力的增加而增加,随单次松弛时间的增加而降低;反复应力松弛率随初始松弛应力和单次松弛时间的增加而增加,随松弛次数增加而降低;反复应力松弛速率随单次松弛时间和松弛次数的增加而增加,随初始松弛应力的增加而减少。
To further investigate the stress relaxation property of membrane materials, the repeated stress relaxation property of PVC membrane was tested in this study, and the effects of initial relaxation stress, relaxation number and single relaxation time on the residual stress, repeated stress relaxation ratio and repeated stress relaxation rate were also discussed. The analytical results showed that residual stress increased with relaxation number and initial relaxation stress, and decreased with relaxation time. The repeated stress relaxation ratio increased with initial relaxation stress and single relaxation time, and decreased with relaxation number. The repeated stress relaxation rate increased with single relaxation time and relaxation number, and reduced with initial relaxation stress.
To further investigate the stress relaxation property of membrane materials, the repeated stress relaxation property of PVC membrane was tested in this study, and the effects of initial relaxation stress, relaxation number and single relaxation time on the residual stress, repeated stress relaxation ratio and repeated stress relaxation rate were also discussed. The analytical results showed that residual stress increased with relaxation number and initial relaxation stress, and decreased with relaxation time. The repeated stress relaxation ratio increased with initial relaxation stress and single relaxation time, and decreased with relaxation number. The repeated stress relaxation rate increased with single relaxation time and relaxation number, and reduced with initial relaxation stress.
引文
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[9] 许珊珊,张营营,张其林.PTFE膜材的应力松弛性能及预测模型分析[J].应用数学和力学,2016,37(3):266-276.
[10] ZHANG Y Y, XU S S, ZHANG Q L, et al. Experimental and theoretical research on the stress-relaxation behaviors of PTFE coated fabrics under different temperatures[J].Advances in Materials Science and Engineering,2015,2015:1-12.
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[12] MENG L, WU M E. Study on stress relaxation of membrane structures in the prestress state by considering viscoelastic properties of coated Fabrics[J].Thin-Walled Structures,2016,106(9):18-27.
[13] ZHANG W L, DING X, YANG X D. A plastic deformation behaviour of PVC coated plain weave membrane under eelaxation condition[J].Applied Mechanics & Materials,2011,71-78(1Pt2):3379-3384.
[14] SCHIESSEL H, METZLER R, BLUMEN A, et al. Generalized viscoelastic models: their fractional equations with solutions[J].Journal of Physics A: Mathematical and General,1995,28(23):6567-6584.
[15] 刘昌伟.大型挑檐式膜结构制造与施工的质量控制[J].科技信息,2011(3):330-331.
[16] 蔡再生.纤维化学与物理[M].北京:中国纺织出版社,2009.
[2] WAKEFIELD S. Engineering analysis of tension structure: theory and practice[J].Engineering Structures,1999,21(8):680-690.
[3] 陈昭荣,蒯蓓蕾,张其林.PVC膜材人工加速老化力学性能试验研究[J].结构工程师,2013,29(5):150-154.
[4] 孟雷,吴明儿.建筑用PTFE膜材应力松弛和徐变性能研究[J].建筑材料学报,2012,15(2):206-210..
[5] 孟雷,吴明儿.建筑用PVC膜材应力松弛性能研究[J].建筑材料学报,2013,16(5):919-922.
[6] 孟雷,吴明儿.张拉成形曲面的应力松弛分析[J].建筑结构学报,2015,36(5):81-87.
[7] 郭郁.篷盖类柔性复合材料应力松弛和疲劳性能的研究[D].上海:东华大学,2006.
[8] 朱勇奕,刘晓明,陈南梁.PVC压延柔性复合材料应力松弛的力学模型[J].纺织学报,2007,28(11):36-39.
[9] 许珊珊,张营营,张其林.PTFE膜材的应力松弛性能及预测模型分析[J].应用数学和力学,2016,37(3):266-276.
[10] ZHANG Y Y, XU S S, ZHANG Q L, et al. Experimental and theoretical research on the stress-relaxation behaviors of PTFE coated fabrics under different temperatures[J].Advances in Materials Science and Engineering,2015,2015:1-12.
[11] XU X Z, HOU J P. A stress relaxation model for the viscoelastic solids based on the steady-state creep equation[J].Mechanical of Time-Dependent Materials,2011,15(1):29-39.
[12] MENG L, WU M E. Study on stress relaxation of membrane structures in the prestress state by considering viscoelastic properties of coated Fabrics[J].Thin-Walled Structures,2016,106(9):18-27.
[13] ZHANG W L, DING X, YANG X D. A plastic deformation behaviour of PVC coated plain weave membrane under eelaxation condition[J].Applied Mechanics & Materials,2011,71-78(1Pt2):3379-3384.
[14] SCHIESSEL H, METZLER R, BLUMEN A, et al. Generalized viscoelastic models: their fractional equations with solutions[J].Journal of Physics A: Mathematical and General,1995,28(23):6567-6584.
[15] 刘昌伟.大型挑檐式膜结构制造与施工的质量控制[J].科技信息,2011(3):330-331.
[16] 蔡再生.纤维化学与物理[M].北京:中国纺织出版社,2009.