Experimental and computational comparative study of the specimens loaded by bending and torsion

Abstract

The article presents the theoretical and computational analysis of the fatigue tested specimens loaded by bending and torsion. The testing device allows loading by constant turn of the clamping parts. The stress and strain magnitude in test depends on the material characteristics and shape of the specimen. The calculations are realized by finite element method (FEM). The obtained results are verified with the experimental measurement applying the optical system ARAMIS.

Monte Carlo comparison of estimation methods for the two-parameter lognormal distribution

“…Bias of parameter : MLM proves to be the best estimation method, with UMVUE as second best, except the case6 Bias of parameter   : Similarly, MLM outperforms the other two methods in majority of cases…”

“…Numerical simulations provide many benefits when modelling in science and technology. They are used for checking various scenarios, for comparison of different approaches or methods, or in first steps of designing devices (see, for example, [6][7][8][9]). We use the Monte Carlo simulation for comparison of the performances of the chosen estimation methods for the lognormal distribution parameters.…”

Comparison of the Optical Lock-in Thermography using the Reflection Mode and the Transmission Mode

“…Subsequently, the response is recorded using a thermal camera. Active thermography includes non-destructive testing (NDT) using thermographic systems [1][2][3][4], thermoelastic stress analysis [5][6][7][8][9], methods for assessing the fatigue of materials [10][11][12][13][14][15][16] etc. The bestknown methods in the field of active thermography include:…”