Yield Criterion

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Yield Criterion
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Yield Criterion
Von- Mises or Equivalent Stress
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Experimental Data
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Examples
Uniaxial Stress (Tension or Compression)
Hydrostatic Stress
Simple Shear
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Decomposition of Elastic and Plastic Strains
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Elastic-Plastic Deformations
Elasticity

• Plastic flow response is path-dependent. Unlike
  elasticity, the material response is a function
  of the path, not just the end points.
• The plastic strain increment depends on the
  current stress value, not the stress increment.

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Work Done in a Closed Loop
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Work Done in a Closed Loop
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Normality Flow Rule
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Convexity of Flow Rule
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Elastic-Plastic Constitutive Model
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Elastic-Plastic Constitutive Model
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Elastic-Plastic Constitutive Model
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Elastic-Plastic Constitutive Model
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SummaryElastic-Plastic Constitutive Model