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Interaction between 3D stress corrosion cracks

100%

Touzet M. , Lamazouade M. , Puiggali M.

Advances in Materials Science

2007

tom Vol. 7, nr 1(11)

55-60

To predict the time to failure of a structure due to stress corrosion crack network, overall crack growth behavior must be studied. When many cracks are initiated in an enclosed area, neighboring cracks may affect the stress field ahead the crack tips and then affect their crack growth rates. The interactions between cracks depend on their relative positions and on their sizes. The present work presents the experimental behavior of crack networks by in-situ observations and proposed a finite element analysis of interacting 3D cracks.

Finite Elements Strenght Analysis of a Compressor Consisting of Four Helical Rotors

63%

Nieoczym A. , Szklarek K.

Advances in Science and Technology. Research Journal

2018

tom Vol. 12, no 1

1--8

The present article reports the results of tests of a compressor consisting of four helical rotors. Finite element strength analysis of rotors with varied screw thread pitch was performed. The analysis allowed us to determine the stress-strain state of the rotor material and deformation of rotors as an effect of loads generated during operation of the compressor. The analysis also made it possible to calculate the frequencies of the free vibrations of the rotors.