Abstract
Roll over protective structure (ROPS) is a critical passive safety system of any off-highway equipment. The ROPS is one of the mandatory DGMS requirements and structure is expected to withstand the impact force and maintains the safe space for operator survival during rollover accident. In the present research work, attempts are made to study the non-linear behavior of a two-post roll over protective structure of motor grader having 25T Gross Vehicle Weight (GVW) by using Finite Element Analysis (FEA). In order to enhance the energy absorbing capacity and to have better performance of ROP structure, an interweave energy absorber was introduced inside the ROPS column. CAD model of ROPS was made by using Pro-E modeling software and non-liner analysis was carried by using LS-Dyna software. Non-linear analysis used to compute the maximum deformation and von-misses stress and energy absorption with respect to the lateral, vertical and longitudinal load. Non-linear analysis was carried out for each load case and studied the behavior of ROPS structure. Among all the load conditions, the lateral impact load is a vital role with respect to the energy absorption criteria. The result of non-linear analysis is appreciably par with the standard ISO: 3471(2008) E ROPS performance.
Highlights
Looking into the growth in the mining and construction sector, there is a great requirement of all the safety systems of vehicle
A few literatures on Roll over protective structure (ROPS) design reveals that Rollover Protective Structure may be an integral part of the cabin or external independent structure which is kept outside the cabin
Another important criterion is the ROPS column should not deform by extending into the operator safe/survival zone, which is known as Deflection Limiting Volume (DLV) as per the standard ISO: 3164 [7]
Summary
Looking into the growth in the mining and construction sector, there is a great requirement of all the safety systems of vehicle. ROPS criteria has played a major role with respect to the operator life It has become a mandatory requirement in Directorate General of Mines Safety (DGMS) in India for the all mining machineries. It is expected to withstand the highest impact load and absorb the energy generated during the rollover Another important criterion is the ROPS column should not deform by extending into the operator safe/survival zone, which is known as Deflection Limiting Volume (DLV) as per the standard ISO: 3164 [7]. In this present study attempt has made to understand the non-linear behavior, strength and energy absorption capacity of compact ROPS for motor grader application
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