In: Civil Engineering
Circular bars subjected to torsion experience Pure Shear over the cross section. Then, why a classroom chalk subjected torsion experience brittle failure by tension cracking at 45° to the circular cross section? Do some research and explain how shafts made of ductile materials fail when subjected to torsion. Compare and contrast both the brittle failure in chalk and ductile failure in shaft. Explain your answer using the plotted graphs.