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S25 Métodos Numéricos |
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Title:
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DETERMINATION OF THE CONSTANTS FOR CREEP CONSTITUTIVE EQUATIONS USED ON FINITE ELEMENTS MODELS
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Summary :
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TO REPRESENT THE CREEP BEHAVIOR OF THE MATERIALS, THE FINITE ELEMENT METHOD USUALLY USES CONSTITUTIVE EQUATION ESTABLISHING THE CREEP STRAIN RATE AS A FUNCTION OF THE STRESS, TOTAL STRAIN AND TEMPERATURE. NORMALLY, THESE EQUATIONS PRESENTS A GROUP OF CONSTANTS TO BE DETERMINATED FOR EACH MATERIAL AND TEMPERATURE RANGE. THIS WORK PROPOSES A METHODOLOGY TO THE DETERMINATION OF THESE CONSTANTS BASED ON THE MINIMUM SQUARE METHOD. THE RESULTS OF THE APPLICATION OF THESE METHODOLOGY TO THE DETERMINATION OF THE CONSTITUTIVE EQUATIONS FOR THE INCOLOY 800H SUBMITTED TO TEMPERATURES BETWEEN 1200 E 1400 °F, ARE ALSO PRESENTED |
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Author :
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Alves , José Luis Drummond
Landau, Luiz 0
Vilhena, Carlos José Carneiro
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Paper View :
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