Determine the creep compliance J(t) of a material that responds like:

Question

a) an elastic spring with Young's modulus E

J(t):

b) a viscous dashpot with viscosity η as a function of time t)

J(t):

c) the Maxwell model (E for spring, and η for dashpot as a function of time t)

J(t):

d) the Voigt model (E for spring, and η for dashpot as a function of time t)

J(t):