Experimental and theoretical analysis of laterally pre-stretched pure shear deformation of dielectric elastomer

被引:25
作者
Ahmad, Dilshad [1 ]
Patra, Karali [1 ]
机构
[1] Indian Inst Technol Patna, Dept Mech Engn, Patna 800013, Bihar, India
关键词
Elastomer; Pure shear test; Pre-stretch; Ogden model; Modulus; Failure stretch; ACTUATOR; FAILURE;
D O I
10.1016/j.polymertesting.2019.02.030
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Recently laterally pre-stretched pure shear deformation is considered as the most compatible and easier way of achieving higher actuation performances of dielectric elastomer actuator due to improvement of its dielectric strength and pull-in stability. However, an accurate experimental investigation and modelling criteria of dielectric elastomer under various lateral pre-stretches up to failure have still not been reported in details. In the present work, different pre-stretch levels are incorporated in commonly used material, VHB 4910 under pure shear loading at sufficiently slow strain rate to obtain stress-stretch curves up to failure. It has been also established that Ogden model parameters obtained by fitting pure shear test data are more accurate for pre-stretched pure shear modelling than those obtained from commonly used uniaxial pull test.
引用
收藏
页码:291 / 297
页数:7
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