The influence of thermoplastic film interleaving on the interlaminar shear strength and mode 1 fracture of laminated composites
- Nanyang Technological Univ., Singapore (Singapore). School of Mechanical and Production Engineering
- Univ. of New Brunswick, Fredericton, New Brunswick (Canada). Dept. of Mechanical Engineering
Results are presented on the interlaminar shear strength (ILSS) and Mode 1 fracture toughness (G{sub IC}) of glass/epoxy laminates interleaved with thermoplastic polyester films using four-point bending and double cantilever beam tests, respectively. The ILSS equation from classical beam theory was modified to account for the increased film thickness. It was found that the ultimate failure load and ILSS could be doubled if a thermoplastic film of high ductility but low glass transition temperature is used. Good film/composite ply adhesion is necessary. Mode 1 fracture toughness is influenced by film thickness and interleaving with a 0.2 mm thick film increased in the G{sub IC} by 40%. Interleaving with a thinner film (0.1 mm), however, resulted in adhesive failure and reduced fiber bridging.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 413228
- Journal Information:
- Journal of Engineering Materials and Technology, Vol. 118, Issue 3; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPOSITE MATERIALS
SHEAR PROPERTIES
FRACTURE PROPERTIES
FIBERGLASS
EPOXIDES
POLYESTERS
SAMPLE PREPARATION
CURING
CONCENTRATION RATIO
BENDING
CRACKS
CRACK PROPAGATION
ULTIMATE STRENGTH
DATA ANALYSIS
FRACTURE MECHANICS
OPTICAL MICROSCOPY
SCANNING ELECTRON MICROSCOPY
EXPERIMENTAL DATA