Characterisation of mechanical energy absorbers developed to complement of roll-over protection structures in agricultural vehicles

Latorre-Biel, Juan-Ignacio; Benito-Amurrio, M.; Pérez-Ezcurdia, Amaya; Arana-Navarro, Ignacio; Alfaro-Lopez, José R.

doi:10.1016/j.biosystemseng.2019.10.007

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…The geometry depicted in Figure 2a is named A8B7C5D4 and includes four rings (A, B, C, and D) with a different number of arms in each (8 arms in the outermost ring, 7 in the second, 5 in the third, and 4 in the innermost ring). Latorre-Biel, et al [32] provided a deeper explanation of the conventional notation chosen to name MEAs. A more complete naming of an MEA with a thickness of X mm and A8B7C5D4 geometry, would be TX0A8B7C5D4, because thickness is indicated in tenths of mm.…”

Section: Mea Design and Manufacturingmentioning

confidence: 99%

“…The choice of the best MEA for a given application requires knowing the behavior of a range of MEAs with different geometries, materials, and manufacturing processes. The characterization process and discussion of the results of two different geometries of MEAs and a range of thicknesses from 2 to 6 mm is described in the present research, and the characterization of an MEA with a single geometry, A8B7C5D4, two different manufacturing processes, and a smaller and different range of thicknesses, including 1 and 1.5 mm, has been previously addressed [32].…”

Section: Strain Energymentioning

confidence: 99%

“…Another conclusion was the fact that the ROPS combined with an MEA rotated around the anchoring elements placed on one side of the chassis of the vehicle; hence, the clearance zone was not compromised. Latorre-Biel et al [32] described the design of six variants of disc-shaped MEAs with A8B7C5D4 geometry. The energy absorbers were manufactured in steel, considering different thicknesses and two production processes: laser and waterjet cutting.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Geometry in the Behavior of Disc-Shaped Mechanical Energy Absorbers for Agricultural Tractors

et al. 2021

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Disc-shaped mechanical energy absorbers (MEAs), in combination with rollover protection structures (ROPSs), may contribute to the prevention of the infringement of the safety zone and the collapse of the ROPS in case of the overturn of an agricultural tractor. An MEA can absorb a significant amount of potential energy of an overturning tractor and its deformation produces a rotation of the ROPS around the safety zone. In this research, MEAs with two different geometries have been developed. Both geometries present common features, such as disc dimensions, number of rings, and number of arms, but the distribution of the arms differs. Additionally, these MEA were manufactured in steel discs of four different thicknesses, ranging from 2 to 6 mm. The manufactured MEAs were tested in a universal testing machine, and their behavior characterized. From this data, linear models of the MEAs were developed. As a consequence, a number of characteristic parameters were selected and calculated, such as the activation load and the strain energy absorbed in a safe range of applied loads. Some patterns and trends were analyzed from the tested MEAs, which enables a better description of their behavior and the extrapolation of this behavior to other non-tested thicknesses and geometries.

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Section: Mea Design and Manufacturingmentioning

confidence: 99%

Section: Strain Energymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Geometry in the Behavior of Disc-Shaped Mechanical Energy Absorbers for Agricultural Tractors

et al. 2021

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“…One of the higher causes of deceases in the farming sector is the overturn of tractors not equipped with a rollover protection system (ROPS) [3]. However, a ROPS alone or combined with additional mechanic energy absorbers, may dissipate a large amount of rollover energy [4]. As a consequence, the combination of this type of protection systems, in combination with the use of a safety belt can increase, significantly, the safety of an agricultural, forestry, or industrial vehicle, in the event of overturn [5].…”

Section: Introductionmentioning

confidence: 99%

Design, Manufacturing, Validation of a Multi-Orientation Tilt Test Bench for Testing Vehicles Rollover and Tests of ATV-Quad for Agricultural Applications

et al. 2021

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A rollover test bench has been designed, manufactured, and validated for analyzing the all-terrain vehicle (ATV)-Quad overturn of diverse vehicles in different configurations, such as installing a rollover protection system (ROPS), considering drivers of different physical constitutions, the appropriate use of safety belts, or having a full or empty fuel tank. The main purpose of this research is to determine the tilt angle of the vehicle that triggers the ATV-Quad overturn. The scope of the design and development of the newly conceived bench include the mechanical structure, the electronics and the control. It can simulate static and dynamic rollover in different directions. As a main conclusion, it can be stated that the performance of the test bench was successful, since it allowed for the development of several ATV models, equipped with different dummies, in a variety of configurations. In particular, it was possible to assess the effectivity of the AD-ROPS system (automatically deployed ROPS), regarding the protection of the driver of the vehicle. Moreover, multiple tests, performed with diverse ATV-Quads in the developed bench and in different configurations, have been reported and their results discussed.

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The Integration of Mechanical Energy Absorbers into Rollover Protective Structures to Improve the Safety of Agricultural Tractors in the Event of Rollover

Alfaro-Lopez,

Perez-Ezcurdia,

Latorre-Biel

et al. 2024

Agriculture

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The combination of safety belts and rollover protective structures (ROPSs) is key in improving the safety of agricultural tractors in the event of rollover. However, we also have the opportunity to enhance the security provided by each ROPS; one such example is the combination of this safety device with adequate mechanical energy absorbers (MEAs). Inexpensive disc-shaped MEAs can be included in the anchoring points of a ROPS onto the chassis of a tractor. Three configurations of ROPS combined with MEAs were tested during the application of loads that simulated the effects of side rollover in the vehicle. The tested configurations included a blank MEA as a reference case alongside a single MEA and a stack assembly containing both elements. The results of the tests show that both the deformation of the ROPS itself and the strain energy are larger in the case of blank MEAs; thus, there is also a risk that the clearance zone will be infringed upon and that the protective structure will collapse. We can conclude that the implementation of an appropriate MEA in ROPS reduces the deformation of the ROPS itself and its strain energy in cases of vehicle rollover; hence, the safety provided by such protection systems may be improved at a low cost.

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Characterisation of mechanical energy absorbers developed to complement of roll-over protection structures in agricultural vehicles

Cited by 4 publications

References 19 publications

Influence of Geometry in the Behavior of Disc-Shaped Mechanical Energy Absorbers for Agricultural Tractors

Influence of Geometry in the Behavior of Disc-Shaped Mechanical Energy Absorbers for Agricultural Tractors

Design, Manufacturing, Validation of a Multi-Orientation Tilt Test Bench for Testing Vehicles Rollover and Tests of ATV-Quad for Agricultural Applications

The Integration of Mechanical Energy Absorbers into Rollover Protective Structures to Improve the Safety of Agricultural Tractors in the Event of Rollover

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