A carbon/epoxy lamina having the properties listed in Problem 5.10 is clamped between two rigid plates as
Question:
A carbon/epoxy lamina having the properties listed in Problem 5.10 is clamped between two rigid plates as shown in Figure 5.17. If the lamina is heated from \(20^{\circ} \mathrm{C}\) to \(120^{\circ} \mathrm{C}\), determine the thermal stresses associated with the principal material axes of the lamina.
Problem 5.10
A carbon/epoxy lamina is clamped between rigid plates in a mold (Figure 5.17), while curing at a temperature of \(125^{\circ} \mathrm{C}\). After curing, the lamina/mold assembly (still clamped together) is cooled from \(125^{\circ} \mathrm{C}\) to \(25^{\circ} \mathrm{C}\). The cooling process occurs in moist air and the lamina absorbs \(0.5 \%\) of its weight in moisture. The lamina has the following properties:
Assuming that the lamina properties do not change over this temperature range and that the lamina is initially dry and stress free, determine the residual hygrothermal stresses in the lamina at \(25^{\circ} \mathrm{C}\) for angles \(\theta=0^{\circ}\) and \(45^{\circ}\).
Step by Step Answer:
Principles Of Composite Material Mechanics
ISBN: 9781498720694
4th Edition
Authors: Ronald F. Gibson