Select the true statement regarding the fracture of materials Solution A. Polymer fracture is highly dependent on the testing conditions, such as temperature and strain rate, but is not affected by the nature of bonding of the molecular chains .

1. Select the true statement regarding the fracture of materials
A.
Polymer fracture is highly dependent on the testing conditions, such as temperature and strain
rate, but is not affected by the nature of bonding of the molecular chains
B.
For metals, fracture only occurs along the boundaries created by the differently oriented
grains because the high energy interfaces created by mismatched lattices
C.
A blunt crack tip will result in a faster fracture than a narrow tip because of the larger crack
tip radius
D.
Brittle fracture involves rapid crack propagation with a high degree of plastic deformation in
the direction perpendicular to the tensile stress
E.
The fracture strength is more heavily influenced by the degree, shape, and orientation of
microscopic defects than the nature of atomic bonding of the constituent atoms
Solution
A. Polymer fracture is highly dependent on the testing conditions, such as temperature and strain
rate, but is not affected by the nature of bonding of the molecular chains