Simple solutions of the free-edge effects in composite laminates under thermal and mechanical loads

Conference · Fri Jan 01 00:00:00 EST 1993

OSTI ID:6300253

Yin, W

Intense and localized interlaminar stresses generally occur in a narrow boundary region near the free edge of a multilayered anisotropic laminate under mechanical and temperature loads. Quantitative measures of interlaminar action across interfaces may be readily obtained, through purely algebraic operations, even if nonlinear and inelastic material behavior becomes significant in the boundary region due to severe strain concentration. These measures are the limiting values of the Lekhnitskii stress functions F and psi (and of the normal derivative of F) along interfaces and toward the interior region of the laminate. In the present work, they are used as the basis of an exceedingly simple and efficient method of interlaminar stress analysis that is potentially applicable to free-edge problems involving nonlinear thermoelastic constitutive relations. 11 refs.

• OSTI ID: 6300253
• Report Number(s): AIAA-Paper-93-1510; CONF-9304186-
• Resource Relation: Conference: 34. American Institute of Aeronautics and Astronautics/American Society of Mechanical Engineers (AIAA/ASME) adaptive structures conference, La Jolla, CA (United States), 19-22 Apr 1993; Other Information: 1761-1769
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
THERMAL STRESSES
STRESS ANALYSIS
FINITE ELEMENT METHOD
DYNAMIC LOADS
STRAINS
THERMOELASTICITY
CALCULATION METHODS
ELASTICITY
MATERIALS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
STRESSES
TENSILE PROPERTIES
360603* - Materials- Properties