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11 Tenzori naprezanja i deformacija

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2D - Ravninsko stanje <strong>naprezanja</strong>:<br />

σ x<br />

σ y<br />

τ xy<br />

Glavna <strong>naprezanja</strong>: σ 1 i σ 2 i njihov smjer ϕ:<br />

σ x + σ y σ x −σ<br />

y<br />

σ 1,<br />

2 = ±<br />

+ τ<br />

2 2<br />

tg2ϕ<br />

=<br />

σ<br />

2τ<br />

x<br />

xy<br />

−σ<br />

y<br />

2<br />

2<br />

xy<br />

9

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