单轴多级循环加载下聚氯乙烯膜材料的力学行为与能量耗散

doi:10.13475/j.fzxb.20180406407

纺织学报 ›› 2019, Vol. 40 ›› Issue (06): 20-26.doi: 10.13475/j.fzxb.20180406407

单轴多级循环加载下聚氯乙烯膜材料的力学行为与能量耗散

汪泽幸(), 朱文佳, 何斌, 刘超

湖南工程学院纺织服装学院, 湖南湘潭 411104

收稿日期:2018-04-27 修回日期:2019-03-06 出版日期:2019-06-15 发布日期:2019-06-25
作者简介:汪泽幸(1982—),男,副教授,博士。主要研究方向为产业用纺织品。E-mail:zexing. wang@gmail.com。
基金资助:
湖南省自然科学基金项目(2016JJ6030);湖南省科技厅科学研究项目(2013FJ3091);湖南省教育厅优秀青年项目(16B059)

Mechanical behavior and energy dissipation of polyvinyl chloride membrane under uniaxial multi-level cyclic loading

WANG Zexing(), ZHU Wenjia, HE Bin, LIU Chao

College of Textile and Fashion, Hunan Institute of Engineering, Xiangtan, Hunan 411104, China

Received:2018-04-27 Revised:2019-03-06 Online:2019-06-15 Published:2019-06-25

摘要/Abstract

摘要：

为研究建筑用膜材料在多级循环加载下的力学行为与能量耗散,对聚氯乙烯(PVC)膜材料进行单轴多级循环加载实验测试,分析了变形行为、能量耗散与损伤特性。研究结果表明:相对于单轴拉伸强度,经向试样的循环加卸载峰值强度较低,而纬向试样的循环加卸载强度较高;多级循环加载条件下,加载与卸载弹性模量呈现逐渐增加的变化趋势,且卸载弹性模量高于加载弹性模量;小载荷水平下,相对于经向试样,纬向试样表现出较高的总吸收应变能、弹性应变能和耗散能,但在高载荷水平下较低;在逐级循环加载过程中,PVC膜材料均表现为黏-弹-塑性,基于塑性变形累积来定义损伤变量较为合理。

关键词: 聚氯乙烯膜材料, 多级循环加载, 能量耗散, 损伤变量

Abstract:

In order to investigate the mechanical behavior and energy dissipation of architectural membrane under multi-level loading, the uniaxial multi-level cyclic loading tests were conducted based on the polyvinyl chloride (PVC) membrane, and its deformation behavior, energy dissipation and damage properties were also analyzed. The experimental results show that the peak-strength of warp samples is lower than that of uniaxial tensile strength, and the fill samples is higher that of uniaxial tensile strength under multi-level cyclic loading. Under multi-level cyclic loading, the loading and unloading elastic modulus increase, and the later is higher than former. Compared with warp samples, the fill samples show higher total absorption strain energy, elastic strain energy and dissipated energy at lower loading level, while the indexes are lower at higher loading level. As the PVC membrane is always in viscoelastic plastic stage, it is more reasonable that damage variation is defined based on accumulative plastic deformation, compared with elastic modulus variation and accumulative dissipated energy.

Key words: polyvinyl chloride membrane, multi-level cyclic loading, energy dissipation, damage variable

中图分类号:

TS101

汪泽幸, 朱文佳, 何斌, 刘超. 单轴多级循环加载下聚氯乙烯膜材料的力学行为与能量耗散[J]. 纺织学报, 2019, 40(06): 20-26.

WANG Zexing, ZHU Wenjia, HE Bin, LIU Chao. Mechanical behavior and energy dissipation of polyvinyl chloride membrane under uniaxial multi-level cyclic loading[J]. Journal of Textile Research, 2019, 40(06): 20-26.

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单轴多级循环加载下聚氯乙烯膜材料的力学行为与能量耗散

Mechanical behavior and energy dissipation of polyvinyl chloride membrane under uniaxial multi-level cyclic loading

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