The Elastic Share of Inelastic Stress-Strain Paths of Woven Fabrics

被引:4
作者
Motevalli, Mehran [1 ]
Uhlemann, Joerg [2 ]
Stranghoener, Natalie [2 ]
Balzani, Daniel [1 ]
机构
[1] Ruhr Univ Bochum, Chair Continuum Mech, D-44801 Bochum, Germany
[2] Univ Duisburg Essen, Inst Met & Lightweight Struct, D-45117 Essen, Germany
关键词
structural fabric; stress– strain behavior; viscoelastic material response; structural analysis; elastic modeling; ANISOTROPIC POLYCONVEX ENERGIES; MATERIAL MODEL; TENSILE BEHAVIOR;
D O I
10.3390/ma13194243
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Manifold variations of the mechanical behavior of structural woven fabrics appear in the first load cycles. Nevertheless, invariable states, i.e., mechanically saturated states, can be approached by multiple monotonous load cycle biaxial tests. In a state acceptably close to the ideal saturated state, the stress-strain paths reveal the elastic share of the initially inelastic stress-strain paths of woven fabrics. In this paper, the mechanical saturation behavior of two types of PTFE-coated woven glass fiber fabrics is examined and compared to the recently reported saturation behavior of a PVC-coated polyester fabric. With the help of the saturation test data, an extrapolation function is developed that facilitates an estimation of late cycle stiffness behavior based on measured early cycle behavior. Furthermore, the considerable impact of late cycle properties on structural analyses is shown exemplarily in the numerical simulation of a prestressed fabric structure by comparing results achieved from late and early load cycle stiffness parameters.
引用
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页数:23
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