Creep characterization of a fiber reinforced plastic material

<span style="color: #403838; font-family: Arial, Helvetica, sans-serif; font-size: 13px; line-height: 19px; text-align: justify">Creep behavior of [±45°]</span><sub style="margin: 0px; padding: 0px; border: 0px; outline-style: none; font-size: 0.85em; font-family: Arial, Helvetica, sans-serif; line-height: 0; text-align: justify; color: #403838">s</sub><span style="color: #403838; font-family: Arial, Helvetica, sans-serif; font-size: 13px; line-height: 19px; text-align: justify"> composite material is characterized by using uniaxial creep and recovery tests. The well-known Schapery nonlinear viscoelastic consti tutive relation was modified to make it suitable for characterizing the creep behavior of this material. Then, using this modified Schapery constitutive equation, by which the vis coplastic and creep damage can be taken into consideration, the creep behavior of [±45°]. glass fiber reinforced epoxy laminate was studied. The constitutive parameters of the material were determined experimentally, and the procedure and method of determination of the material parameters are proved to be valid.</span>