A steel plate that is 1.5 inch thick and 32 inch wide has a through thickness ce

Question

A steel plate that is 1.5 inch thick and 32 inch wide has a through thickness center crack that is 2.4 inch long. For this steel E-297x106 psi Fy=125,000 psi v=0.29, and KIC=70 ksi inch 0.5 a) Should you use plane strain or plane stress? Plane Strain o Plane Stress b) Find the maximum size of the plastic radius (in inch) Number c) Can LEFM be used? o Yes o No d) Far away from the crack the plate is subjected to a tensile load of 1,120 kip. Find the stress intensity factor (in ksi-(inch) Number e) What is the maximum load (in kip) that can be applied without crack propagation? Number

Explanation / Answer

a. we use plain strain

B. 17.6cm

c. LEFM can not be used in this problem

d. 0.62

e. Maximum load that can be applied is 760kips

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