High Temperature

Thermal mechanical fatigue (TMF) is caused by combined thermal and mechanical loading where both the stresses and temperatures vary with time. This type of loading can be more damaging by more than an order of magnitude compared with isothermal fatigue at the maximum operating temperature. Material properties, mechanical strain range, strain rate, temperature, and the phasing between temperature and mechanical strain all play a role in the type of damage formed in the material. These types of loadings are most frequently found in start-up and shut-down cycles of high temperature components and equipment. Typically, design lives are a few thousand cycles and involve significant plastic strains.

Fatigue Analyzers

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• Thermal Mechanical Fatigue Analyzer
  This analysis is used for situations where both the strain and temperature vary with time.
• Finite Element Model Thermal Mechanical Fatigue Analyzer
  This analysis is used for situations where both the strain and temperature vary with time.

Finders

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• Material Properties
  Find material properties for high temperature fatigue analysis.

Technical Background

• Thermal Mechanical Fatigue Analyzer
• Fatigue Mechanisms
• Oxidation Mechanisms
• Creep Mechanisms
• Fatigue Damage Model
• Oxidation Damage Model
• Creep Damage Model
• Constitutive Equation Model
• Simplified Material Properties
• Comparison With Experiments