Problem 2: The compact tension (CT) specimen is widely used to obtain the fracture toughness of a material. The stress intensity factor for the CT geometry (please see the geometry of the CT in the textbook on page 87 and Figure 4-8) is given by Where f() is a polynomial function shown below and given as equation in the book 4-20 b Plot the ratio of for values of between 0.25 and 0.75