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Simulating Crack Propagation of a Selected Structural Component of the PZL-130 Orlik TC-II Aircrafts

Jankowski K., Reymer P.

Fatigue of Aircraft Structures

2014

Iss. 6

119--127

This paper presents the process of estimating crack propagation within a selected structural component of the PZL-130 Orlik TC-II using a numerical model. The model is based on technical drawings and measurements of the real structure. The proper definition of the geometry, including the location and size of the gap between elements, is significant for mesh generation. During the simulation process the gap is combined node by node. Each time, the strain energy release rate (G) is calculated. The stress intensity factor and geometry correction factor are defined for consecutive crack lengths, and used further on to estimate crack propagation.

Adaptive finite element modeling of stationary and propagating cracks in piezoelectric structures

Jański Ł., Kuna M.

Archives of Mechanics

2011

Vol. 63, nr 5-6

599-619

In the present paper, simulation results of stationary and propagating cracks in piezoelectric test specimens are presented. The simulations have been carried out with a self-developed adaptive finite element computer program. Two specimen configurations are investigated, i.e. the compact tension and three-point bending specimens. In the analysis of the propagating crack in the compact tension specimen, the fracture toughness change due to the change of the electric field in the test domain is taken into account. To prove the importance of the fracture toughness anisotropy assumption, crack growth simulations for the three-point bending specimens are reported.