Compression response of laminated composite panels containing multiple delaminations

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5699634

Kutlu, Z S

An analytical and experimental investigation was performed to study the compression response of laminated composite panels containing multiple delaminations. Both flat and cylindrical panels were considered. An analytical model was developed for simulating the deformations, from initial loading to final collapse, of the laminated composite panels containing one or more through-the-width delaminations. The model consists of three parts: a stress analysis, a contact analysis, and a failure analysis. The stress analysis is based on the finite deformation theory and provides the stresses and strains during the large deformations of the panels; the contact analysis adopts the Lagrange multiplier technique for analyzing the delamination interface condition during loading; the failure analysis is based on fracture mechanics for predicting delamination growth and uses a set of failure criteria for predicting local fiber-matrix failure. These three analyses were incorporated into a nonlinear finite element program designated as PDE-LAM. Experiments on T300/976 graphite/epoxy composite panels (flat and cylindrical) were also performed to substantiate the model further.

• Research Organization: Stanford Univ., CA (United States)
• OSTI ID: 5699634
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
CARBON
COMPOSITE MATERIALS
COMPRESSION STRENGTH
DEFORMATION
ELEMENTAL MINERALS
ELEMENTS
EPOXIDES
FAILURES
FINITE ELEMENT METHOD
GRAPHITE
MATERIALS
MECHANICAL PROPERTIES
MINERALS
NONLINEAR PROBLEMS
NONMETALS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
STRESS ANALYSIS