Mechanical properties, microscopy, and failure mechanisms of carbon fiber reinforced epoxy laminated composites
The mechanical behavior of quasi-isotropic and unidirectional epoxy- matrix carbon-fiber laminated composites subjected to compressive loading at strain rates of 10{sup {minus}3} and 2000 s{sup {minus}1} are described. Failure in the studied composites was dominated by delamination which proceeded by brittle fracture of the epoxy matrix. The matrix-fiber bonding in these composites is very strong and prevented the occurrence of significant fiber-pullout. The mode I delamination strain energy release rate of the unidirectional composites was determined using the double cantilever beam and hole in plate compression methods. The DCB method indicated a significant R curve effect attributed to fiber bridging while the presently available hole in plate analytical methods show questionable validity for highly anisotropic materials.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 205115
- Report Number(s):
- LA-UR-95-4217; CONF-951026-9; ON: DE96005609
- Resource Relation:
- Conference: Materials Week `95, Cleveland, OH (United States), 29 Oct - 2 Nov 1995; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical properties and failure mechanisms of carbon fiber reinforced epoxy laminated composites
Delamination behavior of carbon fiber/epoxy composite laminates with short fiber reinforcement