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Engineering · L4 · Stress-strain curve: ductile metal vs brittle ceramic

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Stress-strain curve comparison: ductile metal (yield plateau) vs brittle ceramic (sudden fracture).

by @openstemUpdated Engineering
Applied Load IncreasesDuctile Metal (e.g. mild steel)Brittle Ceramic (e.g. glass)Linear elastic regionσ = E·ε (Hooke)Yield point σ_yOnset of plasticityStrain hardeningσ increases with εUTS: σ_uts (maximum stress)Necking → FractureDuctile failureLinear elastic onlyno yield, no plasticitySudden brittle fractureat σ ≈ σ_uts

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