Finite element method model of the mechanical behaviour of Jatropha curcas L. seed under compression loading

Petrů, Michal; Novák, Ondřej; Herák, D.; Simanjuntak, Satya

doi:10.1016/j.biosystemseng.2012.01.008

Cited by 72 publications

(39 citation statements)

References 22 publications

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“…The results from this study show that tangent curve equation Eq. (1) can be accurately used for the description of mechanical behaviour of rapeseeds mixture and its course corresponds to the physical situation of the rapeseeds pressing which is in accordance with previous works (Herák et al 2010(Herák et al , 2011aKabutey et al 2011;Petrů et al 2012). To explain further, it was confirmed that the force coefficient of mechanical behaviour mainly influences the magnitude of the compressive force from Eq.…”

supporting

confidence: 86%

“…Also deformation characteristics of pressed mixture can be described by methods based on the Terzagi's model (Shirato et al 1986;Willems et al 2008) or energetic balance model (Zheng et al 2005). To describe the mechanical behaviour of pressed mixture under compression loading using circular shape vessel, the tangent curve method was derived (Herák et al 2010(Herák et al , 2011aKabutey et al 2011;Petrů et. al.…”

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confidence: 99%

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Analysis of tangential curve equation describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading

Herák¹,

Kabutey²,

Divišová³

2013

Res. Agric. Eng.

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Herák D., Kabutey A., Divišová M., 2013. Analysis of tangential curve equation describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading. Res. Agr. Eng., 59: 9-15.The analysis of tangential curve equation for describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading were discussed. Parameters considered in this study include both measured and theoretical amounts of deformation, volume compression and deformation energy. The measured amounts denoted as true deformation, true volume compression and true deformation energy were determined directly from the compression test of the rapeseeds pressed mixture whiles the theoretical amounts expressed as max. deformation, max. volume compression and max. deformation energy were determined by mathematical adjustment of the general tangent curve equation which were verified from the measured data. Also the theoretical amounts further explain the limit deformation, limit volume compression and relationship between strains and limit volume compressions which were statistically analysed to describe true situation of pressing. The results indicate that the tangent curve equation by mathematical modification can be used to determine accurately theoretical amounts of maximal deformation, maximal volume compression and maximal deformation energy.

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confidence: 99%

Analysis of tangential curve equation describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading

Herák¹,

Kabutey²,

Divišová³

2013

Res. Agric. Eng.

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“…Also a finite element method (FEM) model was used by (Petru et al, 2012) to describe the mechanical behaviour of Jatropha curcas L. seeds under linear compression loading.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Mechanical Behaviour of Selected Oilseeds under Compression Loading

Herák

Kabutey

Divišová

et al. 2012

Not Bot Hort Agrobot Cluj

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The present study provides information about the comparison of mechanical behaviour of selected oil bearing crops namely rapeseeds (Brassica napus L.), sunflower seeds (Helianthus annus L.) and jatropha seeds (Jatropha curcas L.) under compression loading. In this research, the compression device ZDM 50 with a chart recorder and a pressing vessel with diameter 100 mm were used to determine the relationship between the magnitude of the pressing force and deformation characteristics of the oilseed crops pressed at initial height 80 mm. From the compression test, the amounts of true deformation, maximal deformation energy and compressive force of the pressed samples were calculated and also mathematical equations describing the limit deformation, maximal deformation ratio, energy ratio and oil point deformation ratio were determined. The oil point position on the deformation curve, that is, the first leakage of oil from the pressing vessel of the various oilseeds was determined and compared. Based on the measured amounts rapeseeds achieved the highest values followed by jatropha seed and then sunflower seed. The amount of deformation energy required for the seed deformation gives the indication the amount of energy needed for obtaining the oil from the seed. It was found that the measured amounts as well as the oil point position on the force-deformation curve of the pressed samples showed varying results due to the seeds physical and inherent characteristics.

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“…It is basically an integration of two major areas of significance and application in mechanical systems namely Tribology and Corrosion [6,7]. Tribology is the science of friction, wear, and lubrication, whereas corrosion relates to chemical aspects of the material degradation in mechanical systems [8,14,15,16,19]. Tribocorrosion can be defined as a degradation phenomenon of material surfaces (wear, cracking, corrosion, etc.)…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Aluminium Alloys 2024 –T 3 Form in Terms of Tribocorrosion Characteristics

Bronček

Dzimko

Hadzima

et al. 2014

Acta Metall Slovaca

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Results of" ball on disc" principle tests to examine the friction coefficient and wear rate of Aluminium Alloys 2024-T3 are presented. Tribocorrosion experiments were performed using a pin on disc tribometer under controlled electrochemical conditions in NaCl solution. This paper reviews the available knowledge relating to the tribocorrosion. Tribocorrosion can be defined as a degradation phenomenon of material surfaces (wear, cracking, corrosion, etc.) subjected to the combined action of mechanical loading (friction, abrasion, erosion, etc.) and corrosion attack caused by the environment (chemical and/or electrochemical interaction), as highlighted in Figure. Experimental confirmations of improving electrochemical properties of the aluminium alloy AW 2024 by anode oxidation and extension of the period of excitement AW 2024 after adjusting surface anode oxidation are documented.Keywords: tribology, corrosion, tribocorrosion, research, coatings, layers IntroductionThe need to select or design new surfaces for future equipment as well as minimize the operating costs and extend the life of existing machinery has led to demands for a much better understanding of surface degradation processes particularly when tribological components are operating in corrosive environments. This has given rise to the active research area of tribocorrosion which seeks to address the concerns above and understand the surface degradation mechanisms when mechanical wear and chemical or electrochemical processes interact with each other. Corrosion is the physicochemical interaction between metal and environment. Corrosion resulted in permanent chemical changes of metal and therefore metal changes his chemical, physical and mechanical properties [1,2]. Corrosion of the most technical metals is spontaneously because of metals tendency to achieve the thermodynamically stable state. Most of the technical metals (except copper, silver, gold and platinum) are no-noble and therefore it is presumption of interaction with environment in common conditions. It is very important to know the corrosion rate of the metal in specific media. The corrosion rate is the rate of the changing the metal to its corrosion product and it is determining by the rate of chemical reactions or by the rate of the transport of active components near metal surface. If the corrosion products are

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Finite element method model of the mechanical behaviour of Jatropha curcas L. seed under compression loading

Cited by 72 publications

References 22 publications

Analysis of tangential curve equation describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading

Analysis of tangential curve equation describing mechanical behaviour of rapeseeds (Brassica napus L.) mixture under compression loading

Comparison of the Mechanical Behaviour of Selected Oilseeds under Compression Loading

Experimental Investigations of Aluminium Alloys 2024 –T 3 Form in Terms of Tribocorrosion Characteristics

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