scholarly journals DETERMINATION OF THE NON-AXISYMMETRIC STRESS STATE IN THE PLASTICITY ZONE BY THE HOLE-DRILLING METHOD WITH OUT-OF-PLANE ESPI

2019 ◽  
Keyword(s):  
Stress State ◽  
Hole Drilling ◽  
Axisymmetric Stress ◽  
Plasticity Zone ◽  
Axisymmetric Stress State ◽  
Hole Drilling Method ◽  
Drilling Method ◽  
Out Of Plane

Residual Stress Analysis in Containers for Transport of Radioactive Materials

2015 ◽  
Vol 732 ◽  
pp. 28-31 ◽  
Author(s):  
František Trebuňa ◽  
František Šimčák ◽  
Miroslav Pástor ◽  
Patrik Šarga
Keyword(s):  
Residual Stresses ◽  
Experimental Methods ◽  
Hole Drilling ◽  
Thermal Processes ◽  
Safe Operation ◽  
Radioactive Materials ◽  
Hole Drilling Method ◽  
Drilling Method ◽  
Residual Stress Analysis

During verification of safe operation of containers for radioactive waste is possible to use analytical, numerical and experimental methods of mechanics. Determination of residual stresses was one part of analysis. The residual stresses in container body can be induced during their production, overloading during operation, radiation or by thermal processes. In the paper are presented results from analysis of residual stresses in containers by using strain-gage hole-drilling method.

A Mathematical Model to Describe the Inner Contour of Moineau Stators

2020 ◽  
Vol 143 (4) ◽  
Author(s):  
Ekrem Oezkaya ◽  
Moritz Fuss ◽  
Dirk Biermann
Keyword(s):  
Mathematical Model ◽  
Machining Process ◽  
Hole Drilling ◽  
Deep Hole ◽  
Deep Hole Drilling ◽  
Hole Drilling Method ◽  
Current State ◽  
Drilling Method ◽  
Large Length

Abstract Bore holes with a large length to diameter ratio of up to l/d = 100 are typically produced using the single-tube deep hole drilling method also named BTA (Boring and Trepanning Association) deep hole drilling method. However, there are various technical applications requiring deep, complex, epitrochoid-similar and helical inner contours, such as stators used in Moineau motors and pumps. According to the current state of the art, epitrochoid-similar contours for small diameters with large drilling depths can only be produced using a special machining process which is referred to a chamber-boring process. In this paper, a developed mathematical model will be presented that describes the epitrochoid-similar contour exactly. This allows the determination of the position-dependent speed and acceleration of the tool, which are necessary for designing the joints and components of the tool system. In addition, this mathematical model can be used for a subsequent Laplace-transformation, so that could be used for a further optimization of the process dynamic in the future.

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