Accession Number:

ADA232098

Title:

An Experimental and Finite Element Investigation into the Nonlinear Material Behavior of Pin-Loaded Composite Laminates

Descriptive Note:

Final rept.

Corporate Author:

ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB

Personal Author(s):

Report Date:

1991-01-01

Pagination or Media Count:

278.0

Abstract:

The effect of crossply linear intralaminar shear behavior on the modeling accuracy of pin-loaded 09ns and 45-45ns composite laminates was quantitatively investigated. Both linear and nonlinear elastic three dimensional finite element approximations that included pin elasticity and contact angle formation were generated. These approximations were compared to both front surface in-plane and out-of plane experimental moire displacement contours generated from geometric and projection shadow moire techniques. A modified three point bend test was used to obtain values of laminate transverse shear moduli while through thickness contraction measurements on laminate tension tests were employed to obtain estimates of the Poisson ratio values. Nonlinear crossply intralaminar shear behavior was determined from the ASTM D3518-76 specification.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE