The stress intensity factor K at a cr I3J M crack in a beam exposed to pure M bi qjl -

Chapter 4, Problem 16

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The stress intensity factor K at a cr I3J M crack in a beam exposed to pure M bi qjl - bending Mis given by: ..... __ ..,.. ....,. .a.... __ --,.-.. f1..K = Ccr./itawhere cr = : . a is the crack length. b is the widtht tis the thickness, and Cis a parameter that depends on the geometry of the specimen and crack. Forthe case of pure bending,c = JtanP[0.923 + 0199<1- sinQ)ZJ where a = alb and p = (Ka)/2p cosPWrite a program in a script file that calculates the stress intensity factor K.The program should read the values of M, b, t, and a :from an ascii text fileusing the load command. The output should be in the form of a paragraphcombining text and numbers,- i.e., something like: "The stress intensity factorfor a beam that is 0.25 m wide and 0.01 m thick with an edge crack of0.05m and an applied moment of20 N-m is XX Pa-sqrt(m)." where XX stands forthe value of K. Use the program to calculate K when M = 20 N-m,b = 0.25 m, t = 0.01 m, and a = 0.25 m.