P.o.M.a.S - 2

Question 1

What happens to stiffness and flexibility when length increases?

Answer 1

stiffness decreases

flexibility increases

Question 2

What equation is used to describe viscous behaviour?

Answer 2

n (coefficient of viscosity) = stress/strain rate

Question 3

How is strain rate calculated?

Answer 3

change in strain divided by change in time

Question 4

how does viscous behaviour differ from elastic behaviour?

Answer 4

in viscous behaviour, a material does not deform instantly, and doesn’t return to its original shape

Question 5

What is viscoelastic behaviour?

Answer 5

a material doesn’t deform instantly, but when the load is removed it does return to its original shape over time

Question 6

What is creep?

Answer 6

the phenomenon of developing strain over time - under a constant loading some materials will continue to lengthen over time

Question 7

What is stress relaxation?

Answer 7

under constant loading, the stress required to deform a material to a certain degree will decrease with time