Nonlinear elastic behavior of unidirectional composites with fiber waviness under compressive loading

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Journal of Engineering Materials and Technology

DOI:https://doi.org/10.1115/1.2805957· OSTI ID:392218

Hsiao, H M; Daniel, I M ^[1]

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1. Northwestern Univ., Evanston, IL (United States). Robert R. McCormick School of Engineering and Applied Science

Nonlinear elastic behavior of unidirectional composites with fiber waviness under compressive loading was investigated theoretically and experimentally. Unidirectional carbon/epoxy composites with uniform, graded, and localized fiber waviness were studied. Complementary strain energy was used to derive the material nonlinear stress-strain relations. Nonlinear material properties obtained from shear and longitudinal and transverse compression tests were incorporated into the analysis. Compression tests of specimens with known fiber waviness were conducted to verify the constitutive relations. Experimental results were in good agreement with predictions based on the constitutive model.

• Sponsoring Organization: USDOE
• OSTI ID: 392218
• Journal Information: Journal of Engineering Materials and Technology, Journal Name: Journal of Engineering Materials and Technology Journal Issue: 4 Vol. 118; ISSN 0094-4289; ISSN JEMTA8
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON FIBERS
COMPOSITE MATERIALS
CORRELATIONS
ELASTICITY
EPOXIDES
EXPERIMENTAL DATA
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
SAMPLE PREPARATION
STRAIN GAGES
STRAINS
STRESSES