The stress intensity factor K at a crack in a beam exposed to pure M bending M is given by: K = CσˆšÏ€a
where σ = 6M/tb2. a is the crack length. b is the width t is the thickness, and C is a parameter that depends on the geometry of the specimen and crack. For
the case of pure bending,
c = ˆštanβ/β [0.923 + 0.199 Write 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 file using the load command. The output should be in the form of a paragraph combining text and numbers, -i.e., something like: "The stress intensity factor for a beam that is 0.25 m wide and 0.01 m thick with an edge crack of 0.05 m and an applied moment of 20 N-m is XX Pa-sqrt(m)." where XX stands for the 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.

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