Material Strength. Stress vs Strain. A graph of stress versus strain is linear for small stresses. The slope of stress versus strain is a modulus that depends on the type of material. For normal stress this is Young’s modulus Y . stiff material. Stress s. elastic material. Strain e.
A (goes into screen)
The shear modulus of bone is 3.5 GPa.
The lower leg has a breaking angle of 3.
It requires 100 Nm of torque.
Torque and angle apply.
Angle is Dx/L = tang
Approximately Rf/L = g
Sheer is related to torque.Twist a Leg
A (surface area)
How much does the volume change?
Use the relation for bulk modulus.
B = -(DP) / (DV/V)
DV= -VDP / B
(-0.50 m3)(2.0 x 107 Pa) / (6.0 x 1010 Pa)
DV = -1.6 x 104 m3Under Pressure