Testing and Fatigue Life Assessment of Timber Truck Stanchions

Abstract

Components of transport trucks are subjected to dynamic cyclic loads. The magnitude of these loads depends on road conditions and cargo mass. Cyclic loads can cause fatigue failure at stress levels significantly below the yield strength of the material. When calculating fatigue, it is necessary to determine the actual loads acting on the structure under working conditions. In this study, stanchion displacements of overloaded timber trucks were measured under both static and dynamic loads. For the specified mass of timber, a history of dynamic loads acting on the stanchion was obtained. Then, based on the finite element analysis, stress concentration points were determined within the base material and welded joints of the stanchion. The history of maximum stresses at concentration points was determined. Stress ranges and mean stresses for the load history were calculated using the rainflow fatigue cycle counting method. Repeats to failure were determined on the basis of the Palmgren–Miner cumulative damage rule and the modified Goodman correction for the points with the highest stress level. Experimental investigation of the actual load history of the stanchion of significantly overloaded timber truck allowed to determine the mileage to potential failure.

Influence of Passenger Capacity on Fatigue Life of Gearbox Suspender of the Traction Transmission System in Urban Railway Vehicles

“…In the work of Han et al [27], to deal with a newly developed ferrite and pearlite wheel material named D1, an alternative ordinary state-based peridynamic model for fatigue cracking was introduced due to cyclic loading. Lisowski et al [28] measured stanchion displacements of overloaded timber trucks under both static and dynamic loads to research fatigue. Li et al [29] presented a framework for the fatigue evaluation of critical steel bridge details using a multi-scale dynamic analysis of the train-track-bridge system and linear elastic fracture mechanics.…”

A Theoretical Model with Which to Safely Optimize the Configuration of Hydraulic Suspension of Modular Trailers in Special Road Transport

“…The safety of trailers as they travel around curves has been analyzed extensively previously. The effect of axle spacing, the load and the height of the center of gravity height on heavy trucks' stability and handling properties have been studied [5][6][7][8]. Other works [9][10][11][12] have revealed significant influence of loading and suspension stiffness on tractor-semitrailer yaw stability.…”