RESEARCH PAPER
Identification of surface stress in the exhaust system pipe made by hydroforming technology based on diffractometric measurements
1
Department of Production Engineering and Materials Technology Czestochowa University of Technology Armii Krajowej 19 str., 42-200 Czestochowa, Poland
Publication date: 2019-12-31
Eksploatacja i Niezawodność – Maintenance and Reliability 2019;21(4):562-566
KEYWORDS
ABSTRACT
In the work identificaton of surface stresses in the exhaust pipe made of Cr-Ni steel shaped with hydroforming technology. Stresses
were determined by the non-destructive x-ray method sin2
ψ. A complex state of tensile stresses with values in the range of 69÷240
MPa for circumferential stresses and 26÷290 MPa for longitudinal stresses was found on the surface of the pipe. The distribution
of stresses on the circumference and length of the pipe was analyzed on the basis of coefficients of variation and wall thickness.
A relationship was found between the value of surface stress and the wall thickness of the pipe. The highest stresses occurred in
the areas of the pipe where the thickness of the wall was reduced the most. In the central part of the pipe, where the wall thickness
reduction was the smallest, the stresses were also the smallest, but they were characterized by the highest dispersion of value. The
distribution of surface stresses determined by diffractometric method was compared with the model of deformation of the pipe
generated numerically
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CITATIONS (3):
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Exhaust system piping made by hydroforming: relations between stresses, microstructure, mechanical properties and surface
Barbara Kucharska, Oskar Moraczyński
Archives of Civil and Mechanical Engineering
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Archives of Civil and Mechanical Engineering
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The Effect of the Burnishing Process on the Strain Rate and State Stress in Hollow Steel Tubes
Tomasz Cyryl Dyl, Wioletta Kuśmierska-Matyszczak
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Assessment of the automatic train protection system and its association to signals passed at danger in railway safety management
Guilherme Ribeiro, Gonçalo F. Neves, Miguel I. Grilo, Virgínia Infante, António R. Andrade
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Guilherme Ribeiro, Gonçalo F. Neves, Miguel I. Grilo, Virgínia Infante, António R. Andrade
International Journal of System Assurance Engineering and Management
| eISSN: | 2956-3860 |
| ISSN: | 1507-2711 |
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