Mechanical properties and failure mechanisms of carbon fiber reinforced epoxy laminated composites

Journal Article · Wed May 01 04:00:00 EDT 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.50813· OSTI ID:561710

Richards Thissell, W; Zurek, A K ^[1]; Addessio, F ^[2]

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1. Materials Research and Processing Science, MS: G755, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. Materials Research and Processing Science, MS: G755, Fluid Dynamics, MS: B216, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

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 2000s{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 method. 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. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 561710
• Report Number(s): CONF-950846--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 370; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON FIBERS
COMPOSITE MATERIALS
COMPRESSION
FAILURES
MECHANICAL PROPERTIES
STRAIN RATE
STRESSES