High strain rate behaviour of engineering materials

Summary

This study is a part of ongoing research to develop lightweight materials that can sustain severe loading conditions. The Split Hopkinson Pressure Bar (SHPB) method will be used for high strain rate tests and the INSTRON tensile testing machine will be used for medium to low strain rate tests. Stress-strain behaviour will be obtained for the different metals under strain rates in the range of 10-3/s to104/s.

Supervisor(s)

Dr Damith Mohotti

Research Location

Civil Engineering

Program Type

Masters/PHD

Synopsis

This study is a part of ongoing research to develop lightweight materials that can sustain severe loading conditions. The main characteristic of such materials is their ability to withstand large strains under both dynamic compressive and tensile loadings without undergoing fracture. The energy absorption of the material is the governing criteria for this phenomenon. Two different test setups will be used. The Split Hopkinson Pressure Bar (SHPB) method will be used for high strain rate tests and the INSTRON tensile testing machine will be used for medium to low strain rate tests. Stress-strain behaviour will be obtained for the different metals under strain rates in the range of 10-3/s to104/s. One of the objectives of the project is to develop a constitutive material model to predict high strain rate behavior of amour grade steel alloy in high strain rate regime.

Keywords

high strain rate behaviour, metal, Split Hopkinson Pressure bar (SHPB)

Opportunity ID

The opportunity ID for this research opportunity is: 2343

Other opportunities with Dr Damith Mohotti

• Development of a CFD based numerical approach in predicting wind loads on structures
• Blast and impact loadings on structures
• Development of smart materials impedance graded composite materials in blast and impact mitigation
• Evaluation of possible head Injuries in construction and sport fields