State the Cowper-Symonds empirical equation which describes the effect of strain rate on the flow stress of metallic materials. Using the Cowper-Symonds equation, together with the material constants D and q in the equation as given in the Table below, describe the comparative high strain rate sensitivity of the different materials (assume e° = 3 4 s'). Material D (s') Copper 4.8 52 Stainless Steel 9.2 99 Titanium Alloy 9.2 122 Aluminium Alloy 4.2 6710 Mild Steel 5.1 45

State the Cowper-Symonds empirical equation which describes the effect of strain rate on the flow stress of metallic materials. Using the Cowper-Symonds equation, together with the material constants D and q in the equation as given in the Table below, describe the comparative high strain rate sensitivity of the different materials (assume e° = 3 4 s'). Material D (s') Copper 4.8 52 Stainless Steel 9.2 99 Titanium Alloy 9.2 122 Aluminium Alloy 4.2 6710 Mild Steel 5.1 45

Elements Of Electromagnetics

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Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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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.

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Q7//
State the Cowper-Symonds empirical equation which describes the effect of strain rate on the flow stress of
metallic materials. Using the Cowper-Symonds equation, together with the material constants D and q in the
equation as given in the Table below, describe the comparative high strain rate sensitivity of the different materials
(assume e° = 3 4 s').
Material
D (s')
Copper
4.8
52
Stainless Steel
9.2
99
Titanium Alloy
9.2
122
Aluminium Alloy
4.2
6710
Mild Steel
5.1
45

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