Analyses of Fractures that have Caused Traffic Accidents

  • Silvestar Perše
  • Dražen Kovačević
  • Branko Maković

Abstract

The paper analyses some fractures of vehicle componentswhich have caused traffic accidents. The methods of analysingthe cause of fracture have been described, as well as the maintypes of fractures. The first analysed cause of a fracture is the excessivelyrough machine finish which leaves cracks (stress concentrators),the starting points of crack propagation. The secondcause is unprofessionally per[01med welding which later inservice causes fracture at the weld. The third cause is the toohigh content of carbon in the material of the railway vehiclewheel rim. Dwing braking, the higher content of carbon causedformation of excessively hard (and brittle) martensite in thesurface layer of the rim.

References

Metals Handbook Vol. 10. Failure Analysis and Prevention,

American Society for Metals, Metals Park, Ohio

Metals Handbook Vol. 9. Fractography and Atlas of

Fractographs, American Society for Metals, Metals

Park, Ohio 1974

Perse, S.: Osnove strojarstva I, Fakultet prometnih

znanosti, Zagreb, 1993

Ispitivanje dinamicke izdriljivosti osovine. Report for

Istra-Auto Umag, Zavod za materijale Fakulteta strojarstva

i brodogradnje, Zagreb, 19. March 1986

Ispitivanje prijeloma osovine elektricne lokomotive 441 .

Report for ZTP Zagreb, Odrzavanje vucnih vozila, Zavod

za materijale Fakulteta strojarstva i brodogradnje u

Zagrebu, Zagreb, 4. Jan, 1982

How to Cite
1.
Perše S, Kovačević D, Maković B. Analyses of Fractures that have Caused Traffic Accidents. Promet [Internet]. 1 [cited 2022Aug.8];9(4):171-5. Available from: https://traffic.fpz.hr/index.php/PROMTT/article/view/793
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