The origins of stiffness Explain the relationship between the cohesive energy of bonding and the observed stiffness of individual...

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Mechanical Engineering

The origins ofstiffness
Explain therelationship between the cohesive energy of bonding and theobserved stiffness of individual bonds.
How does the stiffnessof individual bonds in a solid affect the overall stiffness andelastic modulus of the material?
What is the atomiclevel mechanism of elastic deformation? In other words, what isoccurring within a solid when it is elastically deformed?

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Cohesive energy is the energy gained by arranging the atoms in a crystalline state as compared with the gas state Insulators and semiconductors have large cohesive energies these solids are bound together strongly and have good mechanical strength Metals with electrons in spbonds have very small cohesive energies This type of metallic bond is weak the crystals are barely held together Single crystals of simple metals such as sodium are mechanically weak At room temperature the crystals have the mechanical consistency of warm butter Special care must be used in handling these crystals because they are See Answer

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