Numerical analysis of the influence of the damping rings' thickness on interrupted dynamic tension results using SiC-reinforced ZC71 magnesium alloy specimens
<p>This article discusses the influence of the thickness of the damping rings used for interrupting a dynamic tension experiments on the results of a modified split Hopkinson tension bar (SHTB). In this paper a device enclosed in an external fixture used for interrupting a dynamic tension expe...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-06-01
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| Series: | Mechanical Sciences |
| Online Access: | https://www.mech-sci.net/10/169/2019/ms-10-169-2019.pdf |
| Summary: | <p>This article discusses the influence of the thickness of the damping rings
used for interrupting a dynamic tension experiments on the results of a
modified split Hopkinson tension bar (SHTB). In this paper a device enclosed
in an external fixture used for interrupting a dynamic tension experiment in
a SHTB is studied. The novelty of this manuscript with respect to previous
studies lies in the fact that the dynamic tension experiment in a SHTB is
interrupted in order to study the mechanical behavior of the material at
high strain rates. The role played by such device is to interrupt the
experiment at different levels of plastic deformation, particularly when the
specimen is about to reach its failure strength. Finite-element (FE)
simulations of high-strain-rate tension experiments are accomplished on a
particle-reinforced metal matrix composite specimen (namely SiC-reinforced
ZC71 magnesium alloy) when varying the thickness of the damping rings.
Interrupting the test before the specimen breaks offers the possibility of
being able to study in a more detailed way the deformation process of such
material at high strain rates. Therefore, this work focuses on the study of
the behaviour of materials undergoing high strain rates, developing a tool
which allows materials to withstand different levels of strain rates in a
controlled manner and providing guidance for future studies. In view of this
research, it can be concluded that the thickness of the damping rings is a
factor that can resolutely influence the interrupted dynamic tension
experiment results avoiding the specimen's failure by optimally buffering
the experiment using 0.8 mm thick lead damping rings.</p> |
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| ISSN: | 2191-9151 2191-916X |