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Study of the frictional contact conditions in the hole expansion test

Neto, D M ; Barros, P D ; Oliveira, M C ; Alves, J L ; Menezes, L F

Journal of physics. Conference series, 2018-07, Vol.1063 (1), p.12139 [Periódico revisado por pares]

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Título:
Study of the frictional contact conditions in the hole expansion test
Autor: Neto, D M ; Barros, P D ; Oliveira, M C ; Alves, J L ; Menezes, L F
Assuntos: Automobile industry ; Coefficient of friction ; Contact pressure ; Coulomb friction ; Finite element method ; Friction ; High strength steels ; Low carbon steels ; Mathematical analysis ; Numerical analysis ; Physics ; Pressure dependence ; Strength to weight ratio
É parte de: Journal of physics. Conference series, 2018-07, Vol.1063 (1), p.12139
Descrição: The adoption of advanced high-strength steels is growing in the automotive industry due to their good strength-to-weight ratio. However, the frictional contact conditions differ from the ones arising in mild steels due to the high values of contact pressure. The objective of this study is the detailed numerical analysis of the frictional contact conditions in the hole expansion test. The Coulomb friction law is adopted in the finite element model, using different values for the (constant) friction coefficient, as well as a pressure dependent friction coefficient. The increase of the friction coefficient leads to an increase of the punch force and a slight decrease of the hole expansion. The results show that increasing the friction coefficient postpones the onset of necking, but the localization does not change.
Editor: Bristol: IOP Publishing
Idioma: Inglês

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