This work presents a comprehensive analysis of the effects of strain and strain rate on the adiabatic heating and the mechanical behavior of a CoCrFeMnNi high-entropy alloy (HEA). In this investigation, compression tests were carried out at quasi-static and dynamic strain rates. The temperature of the specimens was measured using high speed infrared thermography. The high strain rate tests were conducted with a Split Hopkinson Pressure Bar, and the tests at lower strain rates were performed using a universal testing machine. The material exhibited a positive strain rate sensitivity, as true stress–strain plots were shifted upwards with the increase in strain rate. With exception of the isothermal tests, temperature rise and the Taylor–Quinney coefficient (β) were noticeably similar for the investigated strain rates. This study shows that the common assumption that β can be considered 0.9 and constant is possibly not very accurate for the CoCrFeMnNi alloy. The β is influenced by at least strain and strain rate.

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Effects of Adiabatic Heating and Strain Rate on the Dynamic Response of a CoCrFeMnNi High-Entropy Alloy

A meso-scale discrete element method framework to simulate thermo-mechanical failure of concrete subjected to elevated temperatures

/pdf/a-solution-for-the-frictional-resistance-in-macro-block-27u325xe.pdf

A solution for the frictional resistance in macro-block limit analysis of non-periodic masonry

Fire performance of masonry under various testing methods

In-plane structural performance of dry-joint stone masonry Walls: A spatial and non-spatial stochastic discontinuum analysis

Efficient Three Dimensional Nonlinear Thermo-Mechanical Analysis of Structures Subjected to Fire

Reinforced concrete frames are one of the predominant structural systems which are commonly used in India. Fire resistance is an important design aspect as fire is one of the most severe environmental conditions to which structures may be exposed to during their life time. Typical fire resistance analysis involves evaluation of temperature across the structural member and incorporation of the thermal effects in structural analysis by temperature dependent material models of concrete and steel employing various numerical schemes. The main limitation of these methods is that they evaluate the fire resistance of individual structural components and they lack the competency to quantify the response of whole structure. Thermo-mechanical analysis can be carried out in commercial finite element software like ANSYS but modeling an entire structure is computationally very intensive. To alleviate these difficulties, a matrix analysis methodology has been developed incorporating the effects of thermal strains as well as temperature dependent material models of concrete and steel. The key strength of matrix analysis lies in its computational efficiency compared to ANSYS while producing results of reasonable accuracy. Numerical examples are presented to demonstrate the efficacy of the developed methodology

Development of a Matrix Method Based Framework for the Thermo-Mechanical Analysis of RCC Frames

This article develops a fully coupled hydro-thermo-mechanical formulation based on the direct stiffness method for analysis of steel and reinforced concrete structural space frames. The superiority...

P. Ravi Prakash

Papers

Efficient Three Dimensional Nonlinear Thermo-Mechanical Analysis of Structures Subjected to Fire

Development of a Matrix Method Based Framework for the Thermo-Mechanical Analysis of RCC Frames

Fully coupled multi-physics nonlinear analysis of structural space frames subjected to fire using the direct stiffness method

Instability of a mono pile in flexural and buckling modes due to lateral spreading