A structural component in the shape of a flat plate 25.4 mm (1.0 in.) thick is to be fabricated from a metal alloy for which the yield strength and plane strain fracture toughness values are 700 MPa (101,500 psi) and 49.5 MPa√ (45ksi√in.), respectively; for this particular geometry, the value of Y is 1.65. Assuming a design stress one-half of the yield strength, is it possible to compute the critical length of a surface flaw? If so, determine its length; if this computation is not possible from the given data, then explain why