Lab test - Compatibility Mode

Question 1

compressive vs tensile strength test

Answer 1

compressive
sigma

Question 2

results

Answer 2

tensile -> parallel fracture

compressive -> oblique fracture

Question 3

tensile vs shear mode cracks

Answer 3

tensile-mode cracks
mode 1(pull apart in 3 directions - backwards, left, right)

shear-mode cracks
mode 2 ->sliding (forward and backward on horizontal axis)
mode 3 ->tearing (up and down on vertical axis)