Optimization and Fatigue Analysis of Crane Hook Using Finite Element Method
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Date
2018-06
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Publisher
AAU
Abstract
The failure of crane hook occurs because of the stress induced due to repetitive loading and
unloading conditions. These are the causes of fatigue failure of the crane hook. To minimize
the failure of crane hook, the stress induced in the crane hook is studied and reduced the
maximum stress than existing (trapezoidal) crane hook. By modifying the geometry (cross
section) the stress of the crane hook is reduced comparing with the standard crane hook. In this
study, the cross section has been selected as a basic parameter to optimize the hook design
which carries 4.5-tons load. Because of the stress reduction the fatigue life of the model-3 crane
hook goes to increase (have better life comparing with standard and other models of crane
hook). Here, there are four types of cross-section for crane hook namely model-1, model-2,
Model-3 and trapezoidal (standard). These crane hooks are modelled and analysed using
SOLIDWORK and ANSYS software respectively, and the results of each modified crane hooks
are compared with trapezoidal hook results based on different criteria’s which are maximum
stress, maximum deformation, fatigue life and weight of the hooks. Finally based on the
comparisons of each modified modelling crane hooks with the standard crane hook, model-3
is selected. The fatigue life cycle of model-3 crane hook is increased by 22.78% from the
standard crane hook with the same applied load. The maximum Von-Misses stress and weight
of model-3 crane hook are reduced from trapezoidal (standard) crane hook by 3.461 MPa
(4.133%) and 0.354 Kg (2.49%) respectively, and model-3 crane hook has better results of
safety factor & fatigue life than standard crane hook with the same applied load. Therefore,
model -3 crane hook is considered as optimum results.
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Keywords
Crane Hook, Finite Element Method, Weight Optimization, Fatigue Analysis