Peridynamics as Predictive Maintenance Tool for Crack Monitoring

Resumo

The purpose of this work is to demonstrate the initiation and propagation of a crack in a plate of an
A-36 Structural Steel with a pre-existing notch through simulation using a peridynamic model. In the analise it
was used a mesh established through the discretization of 250,000 material points distributed between
coordinates x and y of dimensions: 0.05 meters of length and width and 3x10−4 meters of thickness. A notch of
0.012 meters was added to the left side of the plate breaking the peridynamic interactions between material
points of the site. A force of 10,000 Newtons was applied over the entire lower. In the explicit integration,
pairwise forces were calculated for all points using peridynamic interactions of the neighboring points in
addition to the influence of loading. Determining the acceleration of a point, velocity and displacement were
calculated. Time step used was approximately ∆t = 13,37ns to stability and convergence criterion. The software
used to resolve was FORTRAN and demonstrated results VisIt. It was concluded that for the specific component
of a pre-notched plate of A-36 Structural Steel, common material for mechanical constructions, the results
demonstrated that the nucleation phenomena were well represented by the models and peridynamic simulations.
The discovery of the crack propagation direction and its velocity are also extremely important to know the
degree of plate commitment, since in the final state of integration the crack length reached almost 37% of the
plate length.