WorksheetsKMJ25404 Quiz 3_2022
Total questions: 10
Worksheet time: 5mins
At what point on a stress/strain curve does a material goes from elastic to plastic?
Ultimate Strength
Failure Strength
Yield Strength
Stop Strength
A viscoelastic material has the following properties (check all that apply).
Hysteresis as seen on the stress–strain curve.
Occurrence of stretch-relaxation.
Occurrence of creep.
A stiffness dependent on rate of loading.
If a constant stress is applied and the strain is monitored with time for a viscoelastic material, which of the following is TRUE?
Strain will develop instantaneously and remain constant thereafter.
Strain will always increase linearly if the stress is applied.
Strain will increase if the stress is applied but rate of strain will change with time.
If the stress is removed, the strain will instantaneously become zero.
The ability of a material to return to its original state when an external force is removed is called __________.
plasticity
elasticity
pseudo-elasticity
resilience
Viscoelasticity exhibits which of the following properties?
Time-dependent
Temperature-dependent
Temperature and time dependent
Temperature and time independent
A series connection between a Hookean spring and a Newtonian dashpot result is ________ model.
Maxwell
Kelvin-Voigt
Standard linear solid model
Prony series
Stress relaxation is the phenomenon ______________.
in which parts are not loaded
in which stress remains constant on in-creasing load
in which deformation tends to loosen the joint and produces a stress reduced
stress reduces on increasing load
Which of the following isn’t a stage of creep?
Transient creep stage
Constant creep stage
Fracture stage
Steady creep stage
Which one of the following, is a static mechanical property?
Impact strength
Creep strength
Fatigue strength
Rebound hardness
The ______ the melting point and the _____ the elastic modulus, the higher is creep strength.
lower, lower
lower, higher
higher, lower
higher, higher
