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Influence of notch radius and strain rate on the mechanical properties and fracture behavior of TIG-welded 6061 aluminum alloy

Singh R., Chauhan S., Gope P. C.

Archives of Civil and Mechanical Engineering

2016

Vol. 16, no. 3

513--523

It is important to perceive the consequences of the presence of cracks or notches on the mechanical properties of the welded component. There are a number of literatures which focus on the fatigue properties of welds. Moreover, the effect of weld parameters on the mechanical properties has been studied by various researchers. However, the work related to the evaluation of tensile properties of welded components and the effect of notch parameters and test parameters on them is relatively scarce. This paper describes an experimental investigation to study the influence of notch root radius and strain rate on the fracture behavior and tensile properties of TIG-welded 6061 aluminum alloy. The tensile tests have been performed on 100 kN Universal Testing Machine under uniaxial static loading. The maximum stress at the notch tip calculated using Neuber's and Stain Energy Density (SED) methods is compared with the present experimental data. Average percentage variation in the value of maximum stress at the notch tip is 14.5% with respect to Neuber's and 6.9% with respect to SED method.

Thermal analysis of epoxy based coconut fiber-almond shell particle reinforced biocomposites

Chaudhary A. K., Gope P. C., Singh V. K., Suman A. R., Verma A.

Advances in Manufacturing Science and Technology

2014

Vol. 38, nr 2

37--50

In this research, the suitability of almond shell and coconut fiber as a renewable agricultural residue for manufacturing of biocomposite to be used as a replacement of wood was investigated. The use of agriculture waste as a reinforcement in composite may result in several environmental and socioeconomic benefits. Biocomposite containing different weight percentage of almond shell particle (10, 20, 30, 40 and 50 wt%) and coconut fiber (2, 4 and 6 wt%) mixed with 20 wt% of almond shell particles were made using epoxy resin and 0.5 wt% of Tricresyl Phosphate. Thermal stability test and morphology (SEM) of the biocomposite were determined.

W artykule przedstawiono analizę wyników badań trwałości materiałów biokompozytowych umacnianych łuskami migdałowca i włóknami kokosowymi, używanych jako zamienniki drewna. Zastosowanie odpadów rolniczych jako elementów umacniających materiały kompozytowe pozytywnie oddziałuje zarówno na środowisko naturalne, jak i kryteria ekonomiczne ich producentów. W badaniach stosowano materiały biokompozytowe o zawartości cząstek łusek migdałowca od 10 do 50% mas. oraz włókien kokosowych 2, 4 i 6% mas. Osnową wytworzonych kompozytów była żywica epoksydowa z dodatkiem fosforanu trikrezylowego 0,5% mas. Wykonano badania stabilności cieplnej wytworzonych biokompozytów oraz ich mikrostruktury przy zastosowaniu mikroskopu skaningowego SEM.