Chapter 7, Problem 7.39P

Interpretation Introduction

Interpretation:

The given figure is obtained from an acrylic polymer having critical fracture toughness of $2MPa\sqrt{m}$ stress range is of between 210MPa and 110MPa. The growth rate of a surface crack needs to be determined, if it reaches a length of $5\times 10^{-6}m$ and $f=1.0$.

Concept introduction:

Stress intensity factor equation is as follows:

$\Delta k=f({\sigma }_{\max }-{\sigma }_{\min })\sqrt{\pi a}$