Experimental and Constitutive Investigation on Tensile and Compressive Behavior of MDYB-3 at Different Temperatures and Loading Rates

In the present study, tensile tests and compressive tests at different loading rates and different temperatures were carried out to study the mechanical behaviors of MDYB-3 systematically. The experimental results show that the stress-strain behavior and mechanical performance of MDYB-3 material under tension differ significantly from it under compressive response. The tension failure strength, elastic modulus and yield strength increase basically with the rise of temperature, while the critical strain decreases with the rise of temperature. Furthermore, a tensile constitutive model was proposed for MDYB-3 material expressing in terms of elastic, viscous and plastic deformation.