Constitutive modeling of composites incorporating nonlinear and three-dimensional effects

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1992

OSTI ID:7228785

Sun, Wei

Three-dimensional (3-D) constitutive models are developed in Part 1 to investigate the nonlinear deformation behavior of fiber-reinforced polymer laminae and laminates. These formulations incorporate the complete three-dimensional stress state. The constitutive models are generic in nature and apply to all fiber-composite laminates with constituent plies exhibiting nonlinear stress-strain responses in transverse and shear deformations. The proposed nonlinear 3-D laminate constitutive model is applicable for both thin-section and thick-section composite laminates. The mixed stress/strain-based nonlinear laminate model is formulated to be incorporated with finite-element codes. An incremental elasto-plastic constitutive model for the nonlinear mechanical response of Reinforced-Polymer Aluminum Laminates (RPALL) is developed in Part 2. Theoretical models to predict the effect of thermal-mechanical processing on the subsequent deformation behavior of RPALL are also presented. Relaxation of thermal stresses in composite constituent layers are studied as well as deformation and yielding responses of RPALL systems. Good agreement with experimental data demonstrates the accuracy and applicability of the models.

• Research Organization: Drexel Univ., Philadelphia, PA (United States)
• OSTI ID: 7228785
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COMPOSITE MATERIALS
DEFORMATION
FIBERS
LAYERS
MATERIALS
POLYMERS
PROCESSING
STRESS ANALYSIS
STRUCTURAL MODELS