A simplified transformation approach to obtain structural calibration functions

• Autor(a) principal: CRUZ, JULIO R.B.
• Data de Publicação: 2014
• Outros Autores: LANDES, J.D., 29th NATIONAL SYMPOSIUM ON FATIGUE AND FRACTURE MECHANICS
• Tipo de documento: Artigo de conferência
• Título da fonte: Repositório Institucional do IPEN
• Texto Completo: http://repositorio.ipen.br/handle/123456789/13637
• topic: fracture mechanics; ductility; failures; cracks; fracture properties; fractures

In a ductile fracture methodology developed by Landes et al., the result from a laboratory test is used to predict the behavior of a strucunal component. Within the framework of this methodology, a critical step consists in obtaining the calibration function for the structural component. For those cases where the limit load solution for the structural component is known, a transformation procedure has been used to get the calibration function for the structure directly from that of a fracture toughness specimen. Although the transformation procedure does not involve complex calculations, it does require the user to follow several steps where point to point computations axe necessary. This makes the whole process laborious and time consuming. It will be shown in this paper that, with an additional assumption and without loss of accuracy, the transformation procedure can be greatly simplified. In the alternative procedure proposed here, the coefficients of the calibration function for the structure are obtained by simply scaling their counterparts for the fracture toughness specimen. This is accomplished with the use of two factors: a load factor and a deformation factor. Some examples are presented to demonstrate the convenience of this new procedure.