Application of Notch Strain Approach to Evaluate Fatigue Life of Construction Equipment
The technical development of construction equipment such as wheel loader leads to an increase of not only amount of workload per hour, but also magnitude of allowable stress range. Since welded structures of the wheel loader occupy approximately 40-60% of its total weight and are subjected to incessant fatigue loads, fatal fatigue failures occur occasionally around the welded zone during its practical operation in the field. To reasonably evaluate the fatigue life, the effect of these geometries and welding residual stress on the fatigue life should be taken into account. In this paper, the modified notch strain approach developed previously by the authors is applied practically to assess the fatigue life of welded joints in boom and front frame structures of the wheel loader.
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
S. H. Han et al., "Application of Notch Strain Approach to Evaluate Fatigue Life of Construction Equipment", Key Engineering Materials, Vols. 345-346, pp. 387-390, 2007