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S13 Integridade Estrutural |
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Title:
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SOFTWARE DEVELOPMENT FOR THE FATIGUE LIFE PREDICTION OF STRUCTURAL COMPONENTS
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Summary :
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ABSTRACT. FATIGUE LIFE OF A STRUCTURAL COMPONENT CAN BE EVALUATED CALCULATING INDEPENDENTLY THE INITIATION AND PROPAGATION PHASES. A SOFTWARE PACKAGE BASED ON WINDOWS VISUAL BASIC, WITH AN USER FRIENDLY INTERFACE WAS DEVELOPED FOR PREDICTING FATIGUE LIFE. THE PACKAGE IS COMPOSED OF FOUR MODULES. THE FIRST MODULE COVERS THE EVALUATION OF THE INITIATION PHASE IN STRUCTURAL COMPONENTS CONTAINING DEFECTS, USING LOCAL APPROACH METHODS. NOTCH LOAD AND STRAIN SPECTRA ARE CONVERTED INTO DAMAGE, RESPONSIBLE FOR THE REDUCTION OF THE INITIATION FATIGUE LIFE. SECOND AND THIRD MODULES ALLOW THE EVALUATION OF THE PROPAGATION PHASE USING LINEAR ELASTIC FRACTURE MECHANICS CONCEPTS. IN ONE OF THE MODULES STRESS INTENSITY FACTOR FORMULATIONS AVAILABLE IN THE LITERATURE ARE USED; IN THE OTHER THE BOUNDARY ELEMENT METHOD IS USED TO EVALUATE THE STRESS FIELD AT THE TIP OF THE NOTCH. THE FOURTH MODULE CONTAINS A DATABASE ON MATERIALS PROPERTIES RELEVANT FOR FATIGUE LIFE PREDICTION.
KEY-WORDS: FATIGUE, INITIATION, PROPAGATION, FRACTURE
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Author :
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De Castro, Paulo Tavares
De Jesus, Abílio Manuel
Portela, Artur
Ribeiro, Alfredo Silva
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Paper View :
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COBEM99
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