from an aluminum alloy that has a plane strain fracture toughness of 45 MPa m and a yield strength of 500 MPa.  It has been determined that fracture results at a stress of 250 MPa when the maximum internal crack length is 9 mm.  For this same component and alloy, determine critical internal crack length that will result to fracture if the design stress is three-fourth of the yield strength.  If the available flaw detection apparatus has a resolution limit of 3 mm, will the crack in (1) be detected? Why or why not? Show complete solution

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Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.