Let's investigate the internal stresses of a laminated beam subjected to the 3-point bend test. compare the distribution for the following cases (a) [0,+-45, 90]s and (b) [90/+-45/0]s. in this case, plot latex: \sigma σ x/latex: \sigma σ max using the following properties of unidirectional graphite/epoxy composite. compare the maximum stress in the plot with that found in the equation for maximum stress (refer to the slide titled inplane stress).

e11 = 126 gpa
e22 = 12.2 gpa
g12 = 7.6 gpa
v12 = 0.3
explain what you notice about these plots. is this what you would expect to see? why or why not? how does it compare to the case of a homogeneous beam (i. e., a beam made from one material)?