MME 223 Exam 2 – Study Guide, Revision Notes, and Practice Questions for
Exam Preparation
Properties of tensile testing: - ANS ✔✔Young's modulus, Poisson's ratio, yield strength, and
strain-hardening characteristics.
yield strength, ultimate tensile strength, ductility, strain hardening characteristics, Young's
modulus and Poisson's ratio.
Poisson ratio = - ANS ✔✔lateral strain/longitudinal strain.
The modulus of resilience is defined as - ANS ✔✔the maximum energy that can be absorbed
per unit volume without creating a permanent distortion.
Fracture toughness is - ANS ✔✔the resistance of brittle materials to the propagation of flaws
under an applied stress, and it assumes that the longer the flaw, the lower is the stress needed
to cause fracture.
a measure of the resistance of a material to crack extension under predominantly linear-elastic
conditions. It depends on the materials resistance to crack propagation.
Thicker samples have - ANS ✔✔lower fracture toughness
Increasing temperature - ANS ✔✔increases fracture toughness.
Smaller grain size - ANS ✔✔increases fracture toughness.
Larger flaws - ANS ✔✔reduce permitted stress.
Increase in tensile strength - ANS ✔✔increases fracture toughness.
Exam Preparation
Properties of tensile testing: - ANS ✔✔Young's modulus, Poisson's ratio, yield strength, and
strain-hardening characteristics.
yield strength, ultimate tensile strength, ductility, strain hardening characteristics, Young's
modulus and Poisson's ratio.
Poisson ratio = - ANS ✔✔lateral strain/longitudinal strain.
The modulus of resilience is defined as - ANS ✔✔the maximum energy that can be absorbed
per unit volume without creating a permanent distortion.
Fracture toughness is - ANS ✔✔the resistance of brittle materials to the propagation of flaws
under an applied stress, and it assumes that the longer the flaw, the lower is the stress needed
to cause fracture.
a measure of the resistance of a material to crack extension under predominantly linear-elastic
conditions. It depends on the materials resistance to crack propagation.
Thicker samples have - ANS ✔✔lower fracture toughness
Increasing temperature - ANS ✔✔increases fracture toughness.
Smaller grain size - ANS ✔✔increases fracture toughness.
Larger flaws - ANS ✔✔reduce permitted stress.
Increase in tensile strength - ANS ✔✔increases fracture toughness.
