Experimental analysis of stress fields of rotating structural elements by means of reflection photoelasticity.

The subject of this paper is an experimental stress analysis of a rotor with a symmetrical arm end and a rotor with an asymmetrical arm end. The main aim of this paper is to test the application of the Harmonic Star Method software developed by the authors. This software analyzes stress states in rotating structural elements.

Methodology of contact stress analysis of gearwheel by means of experimental photoelasticity.

The subject of this paper is the analysis of contact stresses that occur between the teeth of a gear. The analysis was carried out by means of reflection photoelasticity, which is an experimental method rarely used in this field. Contact stresses assessed in the experiment are compared with values assessed through an analytical calculation while using the Airy stress function or Hertzian relations.

Application of the harmonic star method in photoelastic separation of principal stresses.

This paper deals with automation of an experiment process by means of photoelasticity on the condition that only information which was previously collected by identification of isochromatic fringes is used. The analysis of this issue pointed to Poisson's and Laplace's equations. These equations were solved through the harmonic star method.

[Differential diagnoses of avascular necrosis of the femoral head. Articular groin pain in adults].

Early diagnosis and therapy of hip joint complaints in the young adult are often crucial for the prognosis of the joint. Besides avascular necrosis of the femoral head several differential diagnoses are possible, which if left untreated frequently lead to early osteoarthritis. The necessity of joint replacement in middle age often could be avoided by initiating adequate therapy as early as possible.