Journal
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
Volume 26, Issue 14, Pages 1429-1440Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0731684407079775
Keywords
cryomechanics; fracture mechanics; damage mechanics; finite element method; material testing; composite materials; single-edge-notched bend specimen; fracture toughness; superconducting magnet
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This study focuses on understanding the cryogenic fracture and damage behavior of woven fabric GFRP laminates. Fracture toughness tests were conducted in three-point bending using single-edge-notched bend (SENB) specimens at room, liquid nitrogen, and liquid helium temperatures. The effects of temperature and specimen size on the apparent fracture toughness were evaluated. A three-dimensional finite element analysis coupled with damage was also employed to study the nonlinear load-displacement response and the damage evolution of SENB specimens, and to examine the effects of temperature, specimen size and damage on the fracture mechanics parameter. The predictions were compared with the experimental data.
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