Material Testing.

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Presentation transcript:

Material Testing

Failure Modes under Uni-axial Tension Necking Brittle Materials Ductile Materials

General Constitutive (Stress-Strain) Relation FG03_04.TIF Notes: Conventional and true stress -strain diagrams for ductile material (steel) (not to scale)

Modeling of Elastic-Plastic Materials Hardening Perfectly Plastic Elastic Elastic Hooke’s Law: s = E e E: Elastic Modulus, Young’s Modulus

Other Characteristics (I)

Other Characteristics (II) FG03_14a.TIF Notes: Stress-strain diagram

Other Characteristics (III) FG03_14b.TIF Notes: Stress-strain diagram

Other Characteristics (IV) Effects of Composition and Heat Treatment Effect of Cyclic Loading: Fatigue

Poisson’s Effect

Constitutive Relations under Multi-axial Loading

Generalized Hooke’s Law

Relations among Elastic Constants