Fillet welds subjected to impact loading – an experimental study
| Autor: | Erik Løhre Grimsmo, Arild Holm Clausen, Arne Aalberg, Magnus Langseth |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Fillet weld Aerospace Engineering 020101 civil engineering Ocean Engineering 02 engineering and technology Welding Impact test 0201 civil engineering law.invention 0203 mechanical engineering law Displacement (orthopedic surgery) Composite material Safety Risk Reliability and Quality Civil and Structural Engineering Test setup business.industry Mechanical Engineering technology industry and agriculture Structural engineering respiratory system Transverse plane 020303 mechanical engineering & transports Mechanics of Materials Automotive Engineering Impact loading Deformation (engineering) business |
| Zdroj: | International Journal of Impact Engineering. 108:101-113 |
| ISSN: | 0734-743X |
| Popis: | Virtually no studies in the open literature are concerned with the behaviour of fillet welds under impulsive loading, which may occur due to actions such as explosions and impact. We therefore developed a novel test setup allowing for measurements of the force and the deformation of fillet welds subjected to impact load conditions. The test specimens had either longitudinally or transversely oriented fillet welds, and they consisted of structural steel. Furthermore, the test specimens were designed so that plastic deformation and failure predominantly occurred in the fillet welds. In addition to the impact tests, corresponding quasi-static tests were performed for comparison. The results showed that the resistance was practically unaffected by the applied displacement rate for both types of specimens. Thus, existing formulas for estimating the resistance of fillet welds that are based on quasi-static behaviour may also be employed for severe impulsive load cases. The deformation capacity of the transverse specimens appeared unaffected by the displacement rate as well. However, the deformation capacity of the longitudinal specimens was significantly reduced for the impact load case. Images of fractured welds recorded with microscopes displayed that the welds experienced stronger localization of deformation for this load case than during quasi-static loading. This enhanced localization was probably induced by self-heating and corresponding thermal softening of the weld material. |
| Databáze: | OpenAIRE |
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