Preliminary results on the design and construction of a split Hopkinson pressure bar (SHPB) testing device
Carregando...
Data
Data de publicação
2022
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24.
Exportar
Resumo
Preliminary results on the design and construction of a split Hopkinson pressure bar (SHPB) testing
device The data obtained during high strain rate testing of materials, metals, is necessary to fulfill
the requirements of information for design and development of parts and components which are
submitted to high strain, e.g. shock subjected parts. In recent years we identify the need for the
testing of ultra high strength steels used in the automotive industry as a resource for the
enhancement of passengers safety. The aim of this work is to present the preliminary results on the
design and construction of a split Hopkinson pressure bar testing device. Compressive tests are
usually performed in a quasi-static condition using a compressive strain rate up to units/s. The
Hopkinson’s pressure bar applies strain rates of hundreds/s to even thousands/s. To achieve such
high strain rates the split Hopkinson pressure bar uses longitudinal trapezoidal mechanical waves
traveling along a bar and striking the sample at the speed of sound of the bar material. The shape
of the wave front dictates the strain rate imposed to the specimen. A split Hopkinson pressure bar
testing device was built, using a pneumatic cannon to drive a striker and generate the trapezoidal
wave. It was instrumented in order to experimentally determine the striker speed and special strain
gauges used to record the local and instantaneous strain on the bar at a high sample rate. To allow
the planning of experiments and control the energy delivered by the striker, a map of the pressure
in the pneumatic cannon against striker speeds. After that the signals recorded from the strain
gauges were processed and are presented. The results were promising yielding strain rates in the
order of 102/s.
Como referenciar
CANAZZA, S.A.; POLITANO, R.; PEREIRA, L.T.; ROSSI, J.L.; MUCSI, C.S. Preliminary results on the design and construction of a split Hopkinson pressure bar (SHPB) testing device. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 24., 6-10 de novembro, 2022, Águas de Lindóia, SP. Resumo... Disponível em: http://repositorio.ipen.br/handle/123456789/33773. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.