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Effects of fabric architectures on mechanical and damage behaviors in carbon/epoxy woven composites under multiaxial stress states

Journal Article · · Polymer Testing
 [1];  [2];  [3];  [4];  [3];  [5];  [5]
  1. The Ohio State Univ., Columbus, OH (United States). College of Engineering; The Ohio State Univ., Columbus, OH (United States)
  2. McMaster Univ., Hamilton, ON (Canada). Dept. of Mechanical Engineering
  3. Shanghai Jiao Tong Univ. (China). State Key Lab. of Mechanical Systems and Vibration
  4. Clemson Univ., SC (United States). Dept. of Mechanical Engineering
  5. Ford Motor Company, Detroit, MI (United States). Dept. of Materials Manufacturing

The mechanical properties and damage evolutions of carbon/epoxy woven fabric composites with three different fabric architectures, including one plain weave and two twill weave patterns, are experimentally investigated under multiaxial stress states. In particular, the effects of weave patterns are investigated by monotonic and cyclic off-axis tension tests. Both elastic modulus and strength degrade remarkably with increasing off-axis loading angle, while Poisson's ratio is much higher than that measured from on-axis tests and increases with loading strain gradually. Different fabric architectures show limited effects on the modulus and strength under multiaxial stress states, and they are well predicted by transformation equation and Tsai-Wu failure criteria, respectively. However, significantly different failure behaviors are observed in three fabric composites, and microstructure observation shows that fabric architecture affects the stress concentration and the damage development. Smaller crimp ratio and compacted structure postpone the damage development but result in more abrupt failure under multiaxial stress states.

Research Organization:
Ford Motor Company, Detroit, MI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0006867
OSTI ID:
1848465
Alternate ID(s):
OSTI ID: 1633393
Journal Information:
Polymer Testing, Journal Name: Polymer Testing Journal Issue: C Vol. 90; ISSN 0142-9418
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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