chapter 8 deforming solids

Question 1

Elastic Energy

Answer 1

E= 1/2ke^2
E=1/2 x F^2 / k
E= 1/2 Fe

Question 2

Brittle

Answer 2

material breaks at elastic limit

Question 3

Ductile

Answer 3

can be stretch to a wire

Question 4

Limit of proportionality

Answer 4

The line is straight to this point because stress a proportional to strain

Question 5

Elastic limit

Answer 5

Here the wire stops behaving elastically and starts to behave plastically

Question 6

Yield point

Answer 6

From here the material shows an appreciably greater increase in strain for a given increase in stress

Question 7

Ultimate tensile stress

Answer 7

the maximum that can be applied before the sample goes on a break

Question 8

Stress

Answer 8

F/A

Question 9

young modulus

Answer 9

stiffness of material (solid) symbol E

Question 10

E1 > E2

Answer 10

=> strain 2 > strain 1

=> extension 2 > extension 1

Question 11

is weight equal to Force ?

Answer 11

Yes

Question 12

Energy in a force and extension graph

Answer 12

1/2 Ke^2

Question 13

Ultimate tensile strength

Answer 13

line with the bigger stress is stronger

Question 14

gradient 1 > gradient 2

Answer 14

Y.u 1 > Y.u 2

=> 1 is more stiff