PPT Slide

• The distance is initially equal to ao.

• Naturally, ? = 0 for a = ao; ? will also be zero when the separation is infinite. The exact form of the curve of ? versus a depends on the nature of the inter-atomic forces.

• In Orowan’s model, the curve is simply assumed to be a sine function, hence the generality of the model.

• The area under the curve is the work required to cleave the crystal.

• The stress dependence on plane separation is then given by the following equation:

(10.1)

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