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Experimental and theoretical research on the dynamic properties of 3D orthogonal woven E-glass fiber/epoxy composites

Xiu-zhang Hu

Open publisher page 4 citations

Abstract

The dynamic properties of 3D orthogonal woven E-glass fiber/epoxy composites were studied experimentally under both the dynamic and static loading conditions,and the stress-strain curves were obtained.The results show that the responses of the composites are of obviously nonlinear and anisotropic characteristics,and of the strain rate sensitivity as well.In theory,a macroscopic damage variable dependent of strain and strain rate is put forward to describe these characteristics,and a nonlinear viscoelastic model is presented for the composites with damage.The stress-strain curves fitted by the modified constitutive equation are in good agreement with the experimental ones.

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What this paper is about

The dynamic properties of 3D orthogonal woven E-glass fiber/epoxy composites were studied experimentally under both the dynamic and static loading conditions,and the stress-strain curves were obtained.The results show that the responses of the composites are of obviously nonlinear and anisotropic characteristics,and of the strain rate sensitivity as well.In theory,a macroscopic damage variable dependent of strain and strain rate is put forward to describe these characteristics,and a nonlinear viscoelastic model is presented for the composites with damage.The stress-strain curves fitted by the modified constitutive equation are in good agreement with the experimental ones.

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Available abstract

The dynamic properties of 3D orthogonal woven E-glass fiber/epoxy composites were studied experimentally under both the dynamic and static loading conditions,and the stress-strain curves were obtained.The results show that the responses of the composites are of obviously nonlinear and anisotropic characteristics,and of the strain rate sensitivity as well.In theory,a macroscopic damage variable dependent of strain and strain rate is put forward to describe these characteristics,and a nonlinear viscoelastic model is presented for the composites with damage.The stress-strain curves fitted by the modified constitutive equation are in good agreement with the experimental ones.

Key concepts: Composite material, Materials science, Epoxy, Viscoelasticity, Strain rate, Glass fiber, Anisotropy, Stress (linguistics)

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