The influence of thermoplastic film interleaving on the interlaminar shear strength and mode 1 fracture of laminated composites

Journal Article · Mon Jul 01 00:00:00 EDT 1996 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.2806810· OSTI ID:413228

Li, L; Liew, K M ^[1]; Lee-Sullivan, P ^[2]

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1. Nanyang Technological Univ., Singapore (Singapore). School of Mechanical and Production Engineering
2. 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, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 3 Vol. 118; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BENDING
COMPOSITE MATERIALS
CONCENTRATION RATIO
CRACK PROPAGATION
CRACKS
CURING
DATA ANALYSIS
EPOXIDES
EXPERIMENTAL DATA
FIBERGLASS
FRACTURE MECHANICS
FRACTURE PROPERTIES
OPTICAL MICROSCOPY
POLYESTERS
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
SHEAR PROPERTIES
ULTIMATE STRENGTH