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Minerals 2016, 6(3), 61; https://doi.org/10.3390/min6030061

Multibody Dynamic Stress Simulation of Rigid-Flexible Shovel Crawler Shoes

Department of Mining and Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA
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Academic Editor: Tuncel M. Yegulalp
Received: 31 March 2016 / Revised: 9 June 2016 / Accepted: 14 June 2016 / Published: 25 June 2016
(This article belongs to the Special Issue Frontiers of Surface Mining Research)

Abstract

Electric shovels are used in surface mining operations to achieve economic production capacities. The capital investments and operating costs associated with the shovels deployed in the Athabasca oil sands formation are high due to the abrasive conditions. The shovel crawler shoes interact with sharp and abrasive sand particles, and, thus, are subjected to high transient dynamic stresses. These high stresses cause wear and tear leading to crack initiation, propagation and premature fatigue failure. The objective of this paper is to develop a model to characterize the crawler stresses and deformation for the P&H 4100C BOSS during propel and loading using rigid-flexible multi-body dynamic theory. A 3-D virtual prototype model of the rigid-flexible crawler track assembly and its interactions with oil sand formation is simulated to capture the model dynamics within multibody dynamics software MSC ADAMS. The modal and stress shapes and modal loads due to machine weight for each flexible crawler shoes are generated from finite element analysis (FEA). The modal coordinates from the simulation are combined with mode and stress shapes using modal superposition method to calculate real-time stresses and deformation of flexible crawler shoes. The results show a maximum von Mises stress value of 170 MPa occurring in the driving crawler shoe during the propel motion. This study provides a foundation for the subsequent fatigue life analysis of crawler shoes for extending crawler service life. View Full-Text
Keywords: surface mining; crawler-terrain interactions; rigid-flexible multi-body dynamic theory; virtual prototype simulation; modal analysis; modal stress recovery surface mining; crawler-terrain interactions; rigid-flexible multi-body dynamic theory; virtual prototype simulation; modal analysis; modal stress recovery
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Frimpong, S.; Thiruvengadam, M. Multibody Dynamic Stress Simulation of Rigid-Flexible Shovel Crawler Shoes. Minerals 2016, 6, 61.

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