An improved analytical model for shear modulus of fiber reinforced laminates with damage

作者：Salavatian Mohammedmandi; Smith Lloyd^*

来源：Composites Science and Technology, 2014, 105: 9-14.

DOI：10.1016/j.compscitech.2014.09.015

• Polymer-matrix composites (PMCs)
• Laminate
• Stiffness degradation
• Transverse cracking

When loaded normal to the fiber direction, transverse cracks often form in the matrix of polymeric composites. Transverse softening has been widely studied, where agreement between models and experiment is common. By comparison, shear softening from transverse cracks has received little attention, and tends not to agree with predictions. The discrepancy between models and observations may be due to the presence of a traction between the crack surfaces. A closed form solution is proposed for the shear stress-strain field of a cracked laminate by replacing the cracks with cohesive zones. The constitutive equations of the crack laminate were derived including the effects of internal tractions and transverse stress on the shear modulus. The analytical solution resulted in good agreement with experimental measurements.

• 出版日期2014-12-10