Thermoviscoelastic Stress Analysis of a CFRP Laminate Subjected to Impulsive Load

摘要

In the present paper, histories of transverse stresses in a carbon fiber reinforced plastic (CFRP) laminate subjected to impulsive force are analyzed theoretically by means of three-dimensional theory with anisotropic thermoviscoelastic property. The analyzed model is a simply-supported square CFRP laminate with a stacking sequence [0° /90°]_SYM undor isothermal conditions from — 100℃ to 200℃. The characteristics of transverse stress histories were considered from the viewpoint of themoviscoelastic behavior of CFRP. When the same force is applied to the laminate under different temperature, each component of transverse stress has the same maximum value, though its history varies slowly over the primary glass transition temperature. Therefore it is shown that elastic property of the fiber governs the maximum values of transverse stresses and histories are dependent on the thermoviscoelasticity of the matrix resin.