Study of the buckling mechanism in laser tube forming with axial preloads |
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| Affiliation: | 1. School of Physical Science, University of Kent, Canterbury CT2 7NH, UK;2. Central Laser Facility, STFC Rutherford Appleton Laboratory, Didcot OX11 0QX, UK;3. Aston Materials Centre, School of Engineering & Applied Science and the Aston Research Centre for Healthy Ageing, Aston University, Birmingham B4 7ET, UK;4. ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK;1. Sapienza Università di Roma, Dipartimento di Ingegneria Meccanica e Aerospaziale, Via Eudossiana, 18, 00184 Roma, Italy;2. Università degli Studi Roma Tre, Dipartimento di Ingegneria, Via V. Volterra 62, 00146 Roma, Italy |
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| Abstract: | The buckling mechanism of a thin metal tube during laser forming with axial preloads was investigated numerically and experimentally in this study. Metal tubes made of 304 stainless steel were heated by a CO2 Gaussian laser beam, which induced the buckling phenomenon on the tube surface due to elastic–plastic deformation. This uncoupled thermal–mechanical problem was solved using a 3D finite element method (FEM) and was subsequently satisfactorily verified with axial force measurements. The transient force response and residual stress of the thin metal tube under specific operation conditions were also studied. |
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