Continuum Mechanics Models for Describing the Creep and Physical Aging Behaviors of Laminated Composites

Jiang Yan Yang; Fu Lin Shang

doi:10.4028/p-8igNHZ

Paper Titles

Research on the Proportion and Strength of Joint Filler Materials for External Wall Tiles
p.87

Adaptational Response of Individual Trabeculae Morphology to Loading at Different Directions
p.95

Static and Fatigue Mechanical Properties of Polymer Matrix Composite Rods
p.101

Application of a Custom Fe Simulation Technique for the Analysis of Hybrid Double-Cover Butt Joints
p.113

Damage Localization in Plate Structures Based on Baseline-Free Method of Lamb Wave Using Mobile Transducer Set
p.119

Continuum Mechanics Models for Describing the Creep and Physical Aging Behaviors of Laminated Composites
p.125

Basic Study on Applicability to Artificial Barriers for Radioactive Waste Disposal Facility for Various Zeolites
p.133

Functionally Graded Concrete: Structural Design and Effect on Sustainability Parameters
p.143

Effect of Grain Size Distribution on Shear Strength Characteristic of Random Fill Material at Keureuto Dam, Indonesia
p.151

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Continuum Mechanics Models for Describing the Creep and Physical Aging Behaviors of Laminated Composites

Abstract:

Two types of carbon fiber-reinforced epoxy composite laminates are chosen for long-term tensile creep tests under different temperatures and load levels. Their time-dependent and non-monotonic deformations indicate clearly both temperature effect and physical aging effect. To characterize these viscoelastic behavior, two phenomenological constitutive models and one physical model are developed. The linear viscoelastic model based on the Boltzmann superposition principle is able to describe reasonably the deformations at relatively lower stress levels and temperatures. The nonlinear viscoelastic model of Schapery’s single-integral form, together with a usage of effective time theory, could describe nicely all the effects of temperature, stress, and physical aging. The physical model based on Ngai’s coupling mechanism concept is further combined with the framework of Schapery’s nonlinear viscoelastic theory, which may provide certain physical understanding about the effect of aging behavior on long-term creep deformation of the laminated composites. Numerical modelling by finite element method are implemented, and comparisons between the experimental and simulation results are demonstrated.