Rework Problem P6.12 using the average stress criterion. Assume that the characteristic distance a0 is 0.15 in. Problem P6.12 Using the point stress criterion, estimate the notched tensile strength of...

Rework Problem P6.12 using the average stress criterion. Assume that the characteristic distance a0 is 0.15 in.

Problem P6.12

Using the point stress criterion, estimate the notched tensile strength of a [0=±30=90]_8S
T-300 carbon fiber–epoxy laminate containing a central hole of (a) 0.25 in. diameter and (b) 1 in. diameter. Assume that the characteristic distance d0 for the material is 0.04 in. The basic elastic properties for the material are given in Problem P6.10. Assume sUt = 61 ksi.

Problem P6.10

Compare the hole stress concentration factors of [0=90]4S, [0=90=±45]2S, and [0=90=±60]2S T-300 carbon fiber–epoxy laminates. The basic lam