Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (06): 20-26.doi: 10.13475/j.fzxb.20180406407

• Textile Engineering • Previous Articles     Next Articles

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

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

  1. 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

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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

CLC Number: 

  • TS101

Fig.2

Fracture stress-strain curves of tested specimens"

Fig.2

Stress-strain curves of tested specimens under multi-level cyclic loading and unloading"

Fig.3

Level 2 stress-strain curves of W-1 specimen"

Fig.4

Elastic modulus curves. (a) Warp specimens; (b) Fill specimens"

Fig.5

Energy variation curves with stress and normalized stress. (a) Total absorption strain energy with stress; (b) Elastic strain energy with stress; (c) Dissipated energy varied with stress; (d)Total absorption strain energy with normalized stress; (e) Elastic strain energy with normalized stress; (f) Dissipated energy varied with normalized stress"

Fig.6

First and second levels stress-strain curves of typical tested samples"

Fig.7

Variation curves of energy dissipation rate with stress (a) and normalized stress (b)"

Fig.8

Curves of damage variable DU and cycle number"

Fig.9

Curves of Damage variable Dε and cycle number"

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