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(CHE 253) EXAM 3

C'mon bruh

QuestionAnswer
Major cause of Crack defects
Does crack propagate faster or slower along grain boundaries faster
for ductile materials crack is stable due to hinderance of crack propagation, what is the cause of the hinderance?
for brittle materials, crack propagation is very fast, why?
Max Stress at crack tip formula is... σm=2σo(a/p)^1/2
cyclic stress till failure is called fatigue
critical stress formula σc={[2E(ys+yp)]/[pi/a]}^1/2
fatigue cyclic stress overtime until failure
4 information of applied cyclic stress mean stress, range of stress, stress amplitude, stress ratio
stress amplitude over time (s-t curve) look like a sine wave
Created by: jmdona09
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