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Performance evaluation of modified bentlegPlow using finite element approach | ||
| Iran Agricultural Research | ||
| مقاله 9، دوره 35، شماره 1، شهریور 2016، صفحه 63-72 اصل مقاله (1.22 M) | ||
| نوع مقاله: Full Article | ||
| شناسه دیجیتال (DOI): 10.22099/iar.2016.3650 | ||
| نویسندگان | ||
| R Jafari* 1؛ T. TavakoliHashjin2 | ||
| 1Department of Biosystems Engineering, College of Agriculture, Jahrom University, Jahrom, I. R. Iran | ||
| 2Department of Mechanics of Agricultural Machinery, College of Agriculture, TarbiatModares University,Tehran, I. R. Iran | ||
| چکیده | ||
| ABSTRACT-This paper aims to develop a new design of a bentleg (BL) plow and to determine its performance as compared to the conventional one using finite element approach. The difference between the modified and conventional BL plows is the direction of angle between the projection of cutting blade on horizontal plane normal to plow shank and the line perpendicular to the plow shank in the same plane. The conventional (B1), and modified (B2) designs of BL plow were modeled at three rake angles R1= 7.5°, R2= 15° and R3= 22.5°. A three dimensional nonlinear finite element model was applied using ANSYS 8.1, 2004. The variation of calculated draft force by model indicated that minimum and maximum draft forces were obtained for B2R2 and B1R3 treatments, respectively. The minimum vertical force was measured for B1R1 treatment. Calculated draft and vertical forces were in good agreement with measured ones. An increasing positive x-y shear stress zone in the modified BL plow causes the soil lifting increase as compared to the conventional one. Similarities of the Von Mises stress contours to stress characteristic curves emphasize the validity of the analysis. The small size of the plastic Von Mises strain contours (plastic bubble) in the modified plow emphasizes the fact that the force requirement of the modified BL plow is less than that of the conventional one. Similarity of the stress distribution contours in soil block and the stress characteristic curves show the validity of the modeling. | ||
| کلیدواژهها | ||
| Keywords:؛ Bentlegplow؛ Draft forces؛ Vertical force؛ Soil displacement | ||
| مراجع | ||
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Abo-Elnor, M., Hamilton,R., Boyle. J.T. (2004). Simulation of soil-blade interaction for sandy soil using advanced 3D finite element analysis. Soil and Tillage Research.75, 61-73. Abu-Hamdeh, N. H., Reeder R. C. (2003). A nonlinear 3D finite element analysis of the soil forces acting on a disk plow. Soil and Tillage Research.74, 115-124. Armin, A., Fotouhi. R., Szyszkowski, W. (2014). On the FE modeling of soil–blade interaction in tillage operations. Finite Elements in Analysis and Design 92, 1–11.
ANSYS. 2004. Documentation, Release 8.1.( 2004). ANSYS Inc, Company. Duncan, J., Chang, C. Y. (1970). Nonlinear analysis of stress and strain in soils. Journal of the Soil Mechanics and Foundations Division., ASCE, 96(5), 1629-1653.
Durairaj, C., Balasubramanian, M. (1997). A method for dynamic measurement of soil failure patterns caused by tillage tools. Soil and Tillage Research 41, 115-121. Durairaj, C., Balasubramanian, M., Rangasamy, K. (1998). An assessment of soil structural changes induced by bentleg ploughs. Soil and Tillage Research. 49, 139-145. Harrison, H. P. (1988). Soil reaction forces for a bentleg plow. Transactions of the ASAE. 30(1), 47-51. Harrison, H. P. (1990). Soil reaction for two tapered bentleg plow. Transactions of the ASAE. 30(1), 1473-1476. Harrison, H. P., Licsko, Z.J. (1989). Soil reacting wrenches and dynamics for three models of bentleg plows. Transactions of the ASAE. 32(1), 50-53. Hill, R. (1950). The mathematical theory of the plasticity. Oxford University Press, London, U.K. Jafari, R., Raoufat, M. H., Tavakoli Hashjin, T. (2008). Soil-bin performance of a modified bentleg plow. Journal of Applied Engineering in Agriculture 24(3), 301-307. Majidi Iraj, H., Raoufat, M. H. (1997). Power requirement of a bentleg plow and its effects on soil physical conditions. Iran Agricultural Research 16(1), 1-16. McKyes, E. (1985). Soil Cutting and Tillage. Elsevier Sciences, Amsterdam (1st ed).
Mouazen, A. M., Nemenyi, M. (1999). Finite element analysis of subsoiler cutting in non-homogeneous sandy loam soil. Soil and Tillage Research. 51, 1-15.
Naderi-Boldaji, M., Alimardani, R., Hemmat, A., Sharifi, A., Keyhani, A., Tekeste, M. Z., Keller, T. (2014). 3D finite element simulation of a single-tip horizontal penetrometer–soil interaction. Part II: Soil bin verification of the model in a clay-loam soil. Soil and Tillage Research. 144, 211-219.
Raoufat, M . H ., Firuzi, S . (1998). Field evaluation of dual bentleg plow. Iran Agricultural Research 17(1), 67-82.
Tagar, A. A., Changying, Ji., Adamowski, J., Malard, J., Qi, C.S., Qishuo, D., Abbasi, N.A. (2014). Finite element simulation of soil failure patterns under soil bin and field testing conditions. Soil and Tillage Research. 145, 157-170. | ||
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