Reuben Govender

Reuben Govender
University of Cape Town | UCT · Department of Mechanical Engineering

PhD

About

17
Publications
2,601
Reads
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134
Citations
Additional affiliations
January 2012 - present
University of Cape Town
Position
  • Professor (Associate)
May 2008 - July 2008
Imperial College London
Position
  • Visiting Researcher
Description
  • Research visit collaborating on spall failure of glass fibre reinforced polymers.

Publications

Publications (17)
Article
A Round-Robin test using split Hopkinson pressure bars (SHPBs) has been conducted by four universities: Swinburne University of Technology (SUT), Australia; University of São Paulo (USP), Brazil; University of Cape Town (UCT), South Africa; and Nanyang Technological University (NTU), Singapore. Each university had different sets of SHPBs and data a...
Article
Full-text available
The effect of strain rate on the ductile fracture of DOMEX 355MC, a high strength low alloy steel, is investigated using notched specimens loaded in uniaxial tension at quasi-static and high strain rates. The high strain rate tests are conducted on a tensile Split Hopkinson Bar (SHB), which incorporates a novel mechanism for tensile loading using a...
Article
Full-text available
The Split Hopkinson Pressure Bar (SHPB) test, while widely utilised for high strain rate tests, has yet to be standardised. As an exploratory step towards developing a standard test method or protocol, a Round Robin test series has been conducted between four institutions: (i) Swinburne University of Technology, Australia (ii) University of São Pau...
Conference Paper
Full-text available
The Split Hopkinson Pressure Bar (SHPB) test, while widely utilised for high strain rate tests, has yet to be standardised. As an exploratory step towards developing a standard test method or protocol, a Round Robin test series has been conducted between four institutions: (i) Swinburne University of Technology, Australia (ii) University of São Pau...
Article
This paper examines the effects of glass fibre configuration and epoxy resin type on the response of glass fibre epoxy-based fibre metal laminate panels. These lightweight materials are excellent candidates for use in transportation applications, where mass is a major factor in design and materials selection. Interfacial bond strength was character...
Article
Full-text available
Rockbursts continue to be a major contributor to mine accidents and cause of damage to mine excavations, particularly at great depth. The problem of rockbursts has also escalated in civil engineering tunnels driven at depth, due to high levels of in situ stress at such depths. Attempts have been made in the past to mitigate the impact of rockbursts...
Article
Conventional Split Hopkinson Pressure Bar (SHPB) testing requires the verification of force equilibrium in a specimen for the test data to be considered valid. For very low impedance materials the large impedance mismatch between input bar and specimens leads to significant uncertainty in the force measurement at the input face. This makes it diffi...
Conference Paper
Abstract Bend tests under impact loading have traditionally been conducted using drop weight testers. However, the force readings from drop weight testers suffer from increasing oscillation (due to load frame vibration and stress wave excitation) as the impact velocity is increased. Different configurations of Hopkinson Pressure Bars (HPB) were ada...
Article
High rate delamination tests are often performed using high speed servo-hydraulic or drop-weight test frames. However, impact induced stress wave propagation in the specimen, load cell and test frame often results in oscillations in the force readings which can obscure specimen response. The Hopkinson Pressure Bar provides a means of measuring impa...
Article
Full-text available
This paper details an investigation of the high strain rate compression testing of GFPP with the Split Hopkinson Pressure Bar (SHPB) in the through-thickness and in-plane directions. GFPP posed challenges to SHPB testing as it fails at relatively high stresses, while having relatively low moduli and hence mechanical impedance. The modifications to...
Article
Knowledge of the properties of soft, viscoelastic materials at high strain rates are important in furthering our understanding of their role during blast or impact events. Testing these low impedance materials using a metallic split Hopkinson pressure bar setup results in poor signal to noise ratios due to impedance mismatching. These difficulties...
Article
The use of thick fiber reinforced polymer (FRP) laminates in composite armor and naval structures requires thorough characterization of the through-thickness properties of said laminates, both quasi-statically and at high strain rates. Specimens cut from an E-Glass/vinyl ester FRP were tested in compression both quasi-statically and dynamically usi...
Article
Full-text available
A Hopkinson Pressure Bar (HPB) was configured to perform spall testing on a glass fibre reinforced polymer (GFRP). The GFRP was woven roving E-glass in a vinyl ester matrix (Derakane 8084). The specimens were cylinders aligned in the through thickness direction, in order to test the interlaminar tensile strength at elevated strain rates. This testi...
Article
This paper presents the results of two test programmes in which quadrangular mild steel plates are subjected to pressure loads created by exploding charges ranging from 100 to 26,288 kg. The charge consists of different ordnances stacked in different configurations, namely compacted and widespread in a carpet-like form. The effects of the charge co...
Article
Full-text available
The majority of published research on numerical modelling of Split Hopkinson Pressure Bars (SHPB) focuses on the response of the specimen, with very little attention given to the dispersive wave propagation in the bars themselves. This investigation focussed on the numerical modelling of wave propagation in cylindrical pressure bars. The Eigen mode...

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Projects

Projects (3)
Project
The SHPB, while well accepted, is not standardised. This exercise was a starting point towards drafting a standard test method the SHPB for engineering metals.