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Experimental investigation on the effects of fabric architectures on mechanical and damage behaviors of carbon/epoxy woven composites
- Source :
- Compos Struct
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- 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 study provides important insights into the geometry-deformation mechanism-mechanical property relationship of the woven composites.
- Subjects :
- Materials science
02 engineering and technology
Epoxy
021001 nanoscience & nanotechnology
Microstructure
Article
020303 mechanical engineering & transports
0203 mechanical engineering
visual_art
Woven fabric
Ultimate tensile strength
Tangent modulus
Ceramics and Composites
Crimp
visual_art.visual_art_medium
Plain weave
Composite material
0210 nano-technology
Elastic modulus
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 02638223
- Volume :
- 257
- Database :
- OpenAIRE
- Journal :
- Composite Structures
- Accession number :
- edsair.doi.dedup.....49ae867badd655482402b59c151bb68c