3–22. The two bars are made of polystyrene, which has the stress-strain diagram shown. Determine the cross-sectional area of each bar so that the bars rupture simultaneously when the load P = 13.5 kN. Assume that buckling does not occur.

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Q: From a microstructure point of view, how do elastic and plastic materials deformations occur?

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Q: How can you determine the modulus of elasticity and the modulus of rigidity of the material?

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Q: selection of materials, why

A: Factors to be considered in material selection of material and essential of these parameters.

Q: What is thermal conductivity as a material property?

A: Thermal conductivity is the property of the material to conduct heat.

Q: Is the bulk modulus a measure of the stiffness of a volume of materials?

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Q: Does the failure of materials occur due to creep and fatigue?

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A: This question is based on scientific opinion.

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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.