Estudo de criterios de resistencia de materiais anisotropicos aplicados a madeira / Study of anisotropic material failure criteria, applied to wood

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

This research deals with the study of anisotropic material failure criteria, specifically TSAI- WU tensor failure criteria, and theoretical and experimental applications for wood. Thus it was carried out a theoretical revision of the principal themes related to this research: general failure criteria, Hankinson s formula, TSAI-WU tensor criterion, failure modes of wood, factors that affect wood strength, equipaments and specimens for development of uniaxial and biaxial tests and rules of design codes of wood structures. The main objective of this work was to determine the TSAI-WU tensor failure criterion parameters, with the purpose of defining the failure surface, for the wood specie Cupiúba (Goupia Glabra) and of comparing the test results and criterion estimates as well. In the experimental development it was performed the following axial tests: tension and compression, with inclined grain angles in related to the load (0°, 15°, 30°, 45°, 60°, 75° and 90°); shear tests and biaxial compression. The estimates of TSAI-WU criterion were close of Hankinson s formula and the tension and compression tests results too. On the other hand, for biaxial compressive test, TSAI- WU criterion influence ofthe interaction coefficient (F12). In general, TSAI- WU criterion can be applied to evaluate wood strength and other anisotropic materials too, by presenting good results and facility in utilizing especially when comparing to other criteria due to its tensor form

ASSUNTO(S)

wood failure criterion strenght anisotropy madeira - testes anisotropia madeira - estruturas

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