Publication: Dynamic compression and recovery of copper for microstructural investigation using momentum trapped shpb
| datacite.subject.fos | oecd::Engineering and technology::Mechanical engineering | |
| dc.contributor.author | Nabilah Binti Amran | |
| dc.date.accessioned | 2026-01-20T07:08:28Z | |
| dc.date.available | 2026-01-20T07:08:28Z | |
| dc.date.issued | 2023-07-01 | |
| dc.description.abstract | Multiple loadings, which occur when stress waves and reflections interact, can introduce distortions in force measurements during experiments. The precise positioning of the momentum trap is crucial for achieving effective force transmission and capturing accurate stress wave profiles. However, determining the exact distance at which the momentum trap should be installed remains a challenging task. The lack of understanding regarding the optimal placement of the momentum trap leads to inconsistent force measurements. This, in turn, makes it difficult to accurately identify failure modes in materials and structures. Without a clear understanding of how materials fail under high-strain-rate events, designing resilient materials and structures becomes a complex task. This experimental study focuses on investigating the effects of a momentum trap on copper specimens subjected to dynamic loading conditions. The primary objectives are to determine the optimal positioning of the momentum trap for effective impact force mitigation and to evaluate its impact on the failure modes of the specimens. The experimental Split Hopkison Pressure Bar setup involves subjecting the copper specimens to low, medium, and high impact loading scenarios, both with and without the momentum trap. The analysis includes studying the characteristics of the first, secondary, and tertiary waves to assess the reduction in wave amplitudes and understand the resulting changes in specimen behavior. The results demonstrate that the implementation of the momentum trap leads to a significant reduction in the amplitudes of the secondary and tertiary waves. In this study, the gaps that have been identified as effective for trapping the loading are 150mm (1 bar), 220mm (1.125 bar), and 250mm (1.25 bar). This reduction indicates the successful mitigation of tensile stresses and reflections, resulting in a more controlled deformation response of the specimens. Furthermore, the examination of the failure modes reveals that the specimens exhibit ductile fracture behavior, as evidenced by the formation of cup-like depressions known as dimples. This research contribute to a deeper understanding of the influence of momentum traps on the behavior of copper specimens under dynamic loading conditions. By optimizing the placement of the momentum trap, wave amplitudes can be effectively reduced, enhancing the overall structural integrity of the specimens. These insights have practical implications for the design and application of momentum traps in various engineering and material testing scenarios, facilitating safer and more reliable experimental investigations | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/23482 | |
| dc.language.iso | en | |
| dc.title | Dynamic compression and recovery of copper for microstructural investigation using momentum trapped shpb | |
| dc.type | Resource Types::text::report::research report | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |