Inelastic constitutive equations for hoop-would glass-fiber reinforced composites under multiaxial loading

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:175135

Karayaka, M; Srinivasan, S; Wang, S S ^[1]

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1. Univ. of Houston, TX (United States)

A combined experimental and analytical study is conducted to evaluate the deformation behavior and associated constitutive equations of hoop-wound E-glass/epoxy cylindrical tubes under multiaxial loading. In the experimental program, the tubular specimens are subjected to both single-step and multi-step loading. Inelastic strain evolution and damage development during multiaxial loading are observed and measured. The composite is found to exhibit linear stress-strain behavior under transverse tensile loading, but significant nonlinearity under transverse compression and combined transverse axial/torsion loading. Experimental observations indicate that hydrostatic stress has a marked influence on the inelastic strain evolution during multiaxial loading. Inelastic deformation under shear loading is suppressed by a compressive hydrostatic stress and aggravated by a tensile hydrostatic stress. In the analytical part of the study, hydrostatic-stress-dependent constitutive equations are constructed to describe the nonlinear inelastic deformation in the composite under multiaxial loading. The effect of stress biaxiality on the inelastic deformation in glass-fiber reinforced composite is studied in detail.

• OSTI ID: 175135
• Report Number(s): CONF-950686--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
COMPRESSION
DEFORMATION
GLASS
MECHANICAL TESTS
SHEAR
TORSION