Publication result detail

Assessment of the cause of cracking of hydraulic hose clamps

PAVLOUŠKOVÁ, Z.; KLAKURKOVÁ, L.; MAN, O.; ČELKO, L.; ŠVEJCAR, J.

Original Title

Assessment of the cause of cracking of hydraulic hose clamps

English Title

Assessment of the cause of cracking of hydraulic hose clamps

Type

WoS Article

Original Abstract

The aim of this study was to determine the cause of failure of the shells of hydraulic hose crimped fittings. For the purpose of examination the damaged crimped shells, undamaged crimped shells and shells prior to crimping were used. Fractographic and metallographic analysis, including chemical microanalysis of inclusions, were performed to determine the cause of failure. For this investigation, optical and scanning electron microscopes and hardness measurement were used. Damaged crimped shells contained higher amount of inclusions compared to undamaged crimped shells and substantially differed in microstructure and hardness. Furthermore, different geometry of the cross section at outer edge containing more effective stress concentrators was observed on failed crimped shells. Based on microstructural observation in cross section, hardness measurements and analysis of inclusions, the conclusion is that cracking of the shells occurred mainly due to deviations in the manufacturing process, combined with lower quality of shell material. Modifications to the technology were suggested to prevent this kind of failure.

English abstract

The aim of this study was to determine the cause of failure of the shells of hydraulic hose crimped fittings. For the purpose of examination the damaged crimped shells, undamaged crimped shells and shells prior to crimping were used. Fractographic and metallographic analysis, including chemical microanalysis of inclusions, were performed to determine the cause of failure. For this investigation, optical and scanning electron microscopes and hardness measurement were used. Damaged crimped shells contained higher amount of inclusions compared to undamaged crimped shells and substantially differed in microstructure and hardness. Furthermore, different geometry of the cross section at outer edge containing more effective stress concentrators was observed on failed crimped shells. Based on microstructural observation in cross section, hardness measurements and analysis of inclusions, the conclusion is that cracking of the shells occurred mainly due to deviations in the manufacturing process, combined with lower quality of shell material. Modifications to the technology were suggested to prevent this kind of failure.

Keywords

Crimped fittings; Hosepipes; Inclusions; Metallography; Cracks

Key words in English

Crimped fittings; Hosepipes; Inclusions; Metallography; Cracks

Authors

PAVLOUŠKOVÁ, Z.; KLAKURKOVÁ, L.; MAN, O.; ČELKO, L.; ŠVEJCAR, J.

RIV year

2016

Released

01.10.2015

Publisher

Elsevier

Location

Elsevier

ISBN

1350-6307

Periodical

Engineering Failure Analysis

Volume

56

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

14

Pages to

19

Pages count

6

URL

http://dx.doi.org/10.1016/j.engfailanal.2015.05.014

BibTex

@article{BUT115063,
  author="Zina {Pavloušková} and Lenka {Klakurková} and Ondřej {Man} and Ladislav {Čelko} and Jiří {Švejcar}",
  title="Assessment of the cause of cracking of hydraulic hose clamps",
  journal="Engineering Failure Analysis",
  year="2015",
  volume="56",
  number="1",
  pages="14--19",
  doi="10.1016/j.engfailanal.2015.05.014",
  issn="1350-6307",
  url="http://dx.doi.org/10.1016/j.engfailanal.2015.05.014"
}