Experimental measurements of the stresses in the lower link of the three-point hitch mechanism
Апстракт
Agricultural machines and their implements are subjected to dynamic loads
during farm operations. Depending on the type of operation (e.g. lifting or plowing), lower links of the three-point hitch mechanism are exposed to stresses caused by combination of bending moments and axial forces. In this paper we analysed influence of the soil resistance during plowing on the lower link and the possibility of its failure. The stresses were measured using strain gauges at locations with uniform stress distribution in order to enable more reliable comparison with finite element analysis (FEA). Recorded stresses vs. time were used for identifying mean stresses and amplitudes for different plowing depth and different tractor speeds. Due to the geometry of the lower links and their joints in the three-point hitch mechanism, during plowing and transferring soil resistance, links are loaded not only by axial forces but also by bending moment in the horizontal plane. Under so...me assumptions, FEA provided us to make relations between the measured stresses and the loads that caused them. Measured stresses show that links have significant safety margin relative to tractor installed power and soil resistance, which enables the possibility of their design optimization. Obtained results may also serve for further analyses of fatigue life prediction, measurement of the draft forces etc.
Кључне речи:
Three-point hitch mechanism / lower link / stress state / strain gauges / finite element analysisИзвор:
The book of Abstract / International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2020, 2018Издавач:
- Belgrade : Innovation Center of Faculty of Mechanical Engineering
Финансирање / пројекти:
- Одрживост и унапређење машинских система у енергетици и транспорту применом форензичког инжењерства, еко и робуст дизајна (RS-MESTD-Technological Development (TD or TR)-35006)
- Научно-технолошка подршка унапређењу безбедности специјалних друмских и шинских возила (RS-MESTD-Technological Development (TD or TR)-35045)
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Cerović, Vera AU - Milković, Dragan AU - Grbović, Aleksandar AU - Radulović, Saša AU - Tanasković, Jovan PY - 2018 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4236 AB - Agricultural machines and their implements are subjected to dynamic loads during farm operations. Depending on the type of operation (e.g. lifting or plowing), lower links of the three-point hitch mechanism are exposed to stresses caused by combination of bending moments and axial forces. In this paper we analysed influence of the soil resistance during plowing on the lower link and the possibility of its failure. The stresses were measured using strain gauges at locations with uniform stress distribution in order to enable more reliable comparison with finite element analysis (FEA). Recorded stresses vs. time were used for identifying mean stresses and amplitudes for different plowing depth and different tractor speeds. Due to the geometry of the lower links and their joints in the three-point hitch mechanism, during plowing and transferring soil resistance, links are loaded not only by axial forces but also by bending moment in the horizontal plane. Under some assumptions, FEA provided us to make relations between the measured stresses and the loads that caused them. Measured stresses show that links have significant safety margin relative to tractor installed power and soil resistance, which enables the possibility of their design optimization. Obtained results may also serve for further analyses of fatigue life prediction, measurement of the draft forces etc. PB - Belgrade : Innovation Center of Faculty of Mechanical Engineering C3 - The book of Abstract / International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2020 T1 - Experimental measurements of the stresses in the lower link of the three-point hitch mechanism UR - https://hdl.handle.net/21.15107/rcub_machinery_4236 ER -
@conference{ author = "Cerović, Vera and Milković, Dragan and Grbović, Aleksandar and Radulović, Saša and Tanasković, Jovan", year = "2018", abstract = "Agricultural machines and their implements are subjected to dynamic loads during farm operations. Depending on the type of operation (e.g. lifting or plowing), lower links of the three-point hitch mechanism are exposed to stresses caused by combination of bending moments and axial forces. In this paper we analysed influence of the soil resistance during plowing on the lower link and the possibility of its failure. The stresses were measured using strain gauges at locations with uniform stress distribution in order to enable more reliable comparison with finite element analysis (FEA). Recorded stresses vs. time were used for identifying mean stresses and amplitudes for different plowing depth and different tractor speeds. Due to the geometry of the lower links and their joints in the three-point hitch mechanism, during plowing and transferring soil resistance, links are loaded not only by axial forces but also by bending moment in the horizontal plane. Under some assumptions, FEA provided us to make relations between the measured stresses and the loads that caused them. Measured stresses show that links have significant safety margin relative to tractor installed power and soil resistance, which enables the possibility of their design optimization. Obtained results may also serve for further analyses of fatigue life prediction, measurement of the draft forces etc.", publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering", journal = "The book of Abstract / International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2020", title = "Experimental measurements of the stresses in the lower link of the three-point hitch mechanism", url = "https://hdl.handle.net/21.15107/rcub_machinery_4236" }
Cerović, V., Milković, D., Grbović, A., Radulović, S.,& Tanasković, J.. (2018). Experimental measurements of the stresses in the lower link of the three-point hitch mechanism. in The book of Abstract / International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2020 Belgrade : Innovation Center of Faculty of Mechanical Engineering.. https://hdl.handle.net/21.15107/rcub_machinery_4236
Cerović V, Milković D, Grbović A, Radulović S, Tanasković J. Experimental measurements of the stresses in the lower link of the three-point hitch mechanism. in The book of Abstract / International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2020. 2018;. https://hdl.handle.net/21.15107/rcub_machinery_4236 .
Cerović, Vera, Milković, Dragan, Grbović, Aleksandar, Radulović, Saša, Tanasković, Jovan, "Experimental measurements of the stresses in the lower link of the three-point hitch mechanism" in The book of Abstract / International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2020 (2018), https://hdl.handle.net/21.15107/rcub_machinery_4236 .