5.7 If localized plasticity is to be considered, explain the physical meaning of the following inequality yst/Ea σδ/σπ/2.

The inequality yst/Ea ...

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5.7 If localized plasticity is to be considered, explain the physical meaning of the following inequality yst/Ea > σδ/σπ/2.

The inequality yst/Ea > σδ/σπ/2 is used to explain the physical meaning of localized plasticity.
If the applied stress (σ) is unchanged, but causes crack growth, then ystσδ is constant since ystσ is constant and δ is proportional to crack length.
The crack length is the only changing variable that increases; therefore, the inequality holds.

Ed · Answer

A desigualdade yst/Ea > σδ/σπ/2 é usada para explicar o significado físico da plasticidade localizada. Se o estresse aplicado (σ) não muda, mas causa o crescimento de uma trinca, então ystσδ é constante, já que ystσ é constante e δ é proporcional ao comprimento da trinca. O comprimento da trinca é a única variável que aumenta, portanto, a desigualdade é válida.

5.7 If localized plasticity is to be considered, explain the physical meaning of the following inequality yst/Ea > σδ/σπ/2. The inequality yst/Ea ...

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