'Crane Hook Elastoplastic Analysis' simulation project by ahmedhussain18


#1

I created a new simulation project called 'Crane Hook Elastoplastic Analysis':

This project shows the plastic deformation of a crane hook as a result of high load.


More of my public projects can be found here.


#2

In this project the plastic deformation of a crane hook is shown as a result of high load. The geometry was created on Onshape and then imported to the SimScale platform. The resulting geometry is shown in the figure below. The faces of hook and eye-bolt which were subjected to physical contact were partitioned (highlighted red in figure below). The geometry was meshed using second order parametrized tetrahedralization on the SimScale platform.

The geometry was meshed using second order Parametrized tetrahedralization on SimScale platform. The mesh is shown in the figure below.

The physical penalty contact was used with higher value of penalty coefficient in order to reduce penetration of contact surfaces. Structured steel was selected as a default material with plasticity and stress-strain data of structured steel was uploaded to the platform. Both hook and eye bolt were given the same material property. The eye bolt was fixed from back and the hook was given displacement of 2 cm (ramped over 1 sec) in positive x direction and then displacement of 0.5 cm (ramped over 0.5 sec) in the opposite direction in order to see the plastically deformed hook.

The figures below were taken at the later time step when the hook was detached from the eye bolt and clearly show the permenantly deformed crane hook. The von Mises stress is trimmed at 250 MPa which is the yield stress of structured steel. Therefore, the red region in the contour plot of von Mises stress shows the area which is plastically deformed.

The graph below shows the von Mises stress in hook. It can be seen that after the first timestep (0.1 sec.), the hook is plastically deformed whereas the negative slope of the curve at 1 sec is due to the detachment of hook from eye bolt when it was displaced in the opposite direction.