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Stress evaluation on the head of seismic wave
Petroš, V. ; Holub, Karel
Paper is intended to investigation of ground velocites of the seismic waves propagation in the rock mass during rockbursts and other anomalous geomechanical events. These data will be used for experiments performed with the aim of comparison the behavior of rock in-situ and under laboratory loading.
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Two paramether description of crack opening displacement
Hutař, Pavel
The basic aim of this paper is to describe the influence of T-stress on a crack profile, crack tip opening displacement CTOD and crack mouth opening displacement CMOD. Different methods of determination CTOD values are discussed. Numerical analysis of specimens is made by finite element method (Ansys). These result are compared with values determinated by modified boundary layer model MBLM.
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Non-utilization as form of stress
Řehulka, Evžen
The study analyzes too little surveyved problematic of non-utilization which must be consider to be a special form of stress. Non-utilization is characterized by boredom, feel of desolation, loss of sense and other subjective annoying states which can be made better by psychotherapy. There are attached four casuistics of this problem for illustration.
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