Sneha Samal

Digital Image Correlation as a Measurement Tool for Large Deformations of a Conveyor Belt

Biaxial tension test of the cruciform specimen of styrene-butadiene rubber is described in this paper. The rubber layer is a part of the conveyor belt used for the transportation of coal. The specimen are loaded by the home made biaxial testing device. The big deformation of specimen are determined by the Digital Image Correlation. The parameters of Mooney-Rivlin hyperelastic material were determined. Numerical simulation of the biaxial test was performed in Comsol Muliphysics.

Influence of Grain Shape, Size, and Grain Boundary Diffusion on High-Temperature Oxidation of Pure Metal Fe, Cu, and Zn

Influence of grain shape, size, and grain boundary diffusion on high-temperature oxidation of pure metals such as Fe, Cu, and Zn was investigated in this article. The oxidized scale was developed on the outer layer of the metal surface depending on the geometrical parameter of the metal-scale system as well as diffusion direction through boundary layers towards the base of the material. The creation of the inner layer and the morphological structure developed from the internal stress generated during the growth of the oxide scale and by diffusion of metal/air system. The oxidation rate depends on the cation and anion mobile transport of the metal in the inward and outward direction of the diffusion layer. Oxidation rate was decreased with the decreasing grain size of the pure metal, whereas Zn metal deviated from this principle. A strong correlation between rate of oxidation and grain shape, size was established.

Low Velocity Impact on Fiber Reinforced Geocomposites

Low velocity impact strength of the fabric reinforced geocomposite has investigated in this article. Various fabrics such as carbon and E-glass were considered for reinforcement in geopolymer matrix. The primary two parameters such as low velocity, impact damage modes are explained on the E-glass and carbon based fabric geocomposite. The onset mode of damage to failure mode is examined through C-scan analysis. The quality of the composite is observed using c-scan with acoustic vibration mode of sensor before and after impact test. Then the effect of fabric and matrix on the impact behaviour is discussed. Residual strength of the composite is measured to determine post impact behaviour. It has been observed that resistance properties of E-glass reinforced composite is better than carbon fabric reinforced composite.