National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Determination of burst pressure of thin-walled pressure vessels
Gajdoš, Lubomír ; Šperl, Martin
A simple fracture-mechanics based method is described for assesing a part-through crack in the wall of a pipe subjected to internal pressure of liquid and/or gas.
A comparison of probable magnitudes of the microplastic limit of CSN 411375 steel determined by the inductance and resistance method
Gajdoš, Lubomír ; Šperl, Martin ; Mentl, V. ; Kaiser, J.
The paper takes up our preceding contribution in which an attention was paid to the significance of microplastic strains and to their measurement by means of changes in electrical impedance of specimens made from normalized low-C steel CSN 411375. In the present paper results are presented which enable a deeper insight into the problem of microplastic limit (MPL) in relation to the measuring methods used.
An engineering method for assessing the strength of damaged pressure vessels
Gajdoš, Lubomír ; Šperl, Martin
On the basis of long research into the structural integrity of high pressure gas pipelines and the theoretical and experimental results, the authors have prepared a simple engineering method for assesing the integrity of cylindrical shells containing longitudinal part-through cracks in the wall.
Microplastic Limit of Steel Determined by the Measurement of Changes in Electrical Impedance
Gajdoš, Lubomír ; Šperl, Martin ; Kaiser, J. ; Mentl, V.
The microplastic limit was determined by evaluation of deltaR-Sigma records. A comparison with the fatigue limit in an axial reversed loading showed that it was below the fatigue limit. The microplastic limit can be considered to separate non-damaging and damaging cyclic stresses.
Influence of Recurrent Overloading on the Integrity of Gas Pipes
Gajdoš, Lubomír ; Šperl, Martin
During hydrostatic tests of gas pipelines the tested pipeline sections are also subjected to recurrent overloading depending on the type and purpose of the test. Recurrent overloading of older piping in operation, in the walls of which the occurrence of cracks cannot be excluded, may be surrounded by some uncertainties as regards their integrity, which may be damaged. On the basis of experimental results obtained on a gas pipe with artificially generated fatigue cracks the authors analysed (from the position of the latest knowledge of fracture mechanics) the conditions that result in the bursting of the ligament in front of the crack tip during recurrent overloading, and discuss the potential mechanisms of reduced fracture pressure during recurrent overloading.

Interested in being notified about new results for this query?
Subscribe to the RSS feed.