Experimental investigation on the effects of fabric architectures on mechanical and damage behaviors of carbon/epoxy woven composites
- The Ohio State Univ., Columbus, OH (United States). College of Engineering; The Ohio State Univ., Columbus, OH (United States)
- McMaster Univ., Hamilton, ON (Canada). Dept. of Mechanical Engineering
- Clemson Univ., SC (United States). Dept. of Mechanical Engineering
- Shanghai Jiao Tong Univ. (China). State Key Lab. of Mechanical System and Vibration
- Ford Motor Company, Detroit, MI (United States). Dept. of Materials Manufacturing
The mechanical behaviors and damage evolutions of carbon/epoxy woven fabric composites with three different geometries, i.e., one plain weave and two twill weave patterns with different areal densities, are studied under tensile loading. The effects of weave patterns on mechanical properties are investigated by monotonic and cyclic tension tests. Remarkable variations in stress–strain curve, Poisson’s ratio, residual strain and strain map exist in the three composites. Crimp ratio is found to be a critical factor to govern the mechanical properties. With smaller crimp ratio, a quasi-linear stress–strain curve with higher elastic modulus and strength is observed. The stress–strain curves of composites with higher crimp ratio contain transition stages with significant tangent modulus degradation. Elastic modulus, strength and damage initiation are all correlated with the crimp ratio linearly regardless of the fabric pattern. Dramatic nonlinear evolution in Poisson’s ratio occurs in the composite with higher crimp ratio. Cyclic tension results indicate that the residual strain is a more appropriate damage indicator than the unloading elastic modulus. Microstructure examination shows that damage developments are essentially related to the fabric geometry, and result in various mechanical behaviors. This work provides important insights into the geometry-deformation mechanism-mechanical property relationship of the woven composites.
- Research Organization:
- Ford Motor Company, Detroit, MI (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE); Clemson University; SC TRIMH
- Grant/Contract Number:
- EE0006867
- OSTI ID:
- 1848461
- Alternate ID(s):
- OSTI ID: 1777541
- Journal Information:
- Composite Structures, Journal Name: Composite Structures Journal Issue: C Vol. 257; ISSN 0263-8223
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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