| 1. |
- Magnusson, Claes, et al.
(författare)
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Creating tailor-made surfaces with high power CO2-lasers
- 1991
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Ingår i: Proceedings of the first ASM Heat Treatment and Surface Engineering Conference in Europe. - : Trans Tech Publications Inc.. - 0878496424 ; , s. 443-458
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Konferensbidrag (refereegranskat)
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| 2. |
- Ring-Groth, Margareta, et al.
(författare)
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Fatigue properties of weldbonded stainless steel joints
- 2000
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Ingår i: Journal of Advanced Materials. - 1070-9789. ; 32:1, s. 21-27
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Tidskriftsartikel (refereegranskat)abstract
- Weldbonding of stainless steel with an epoxy adhesive has been investigated with respect to fatigue life. Factors affecting joint strength have been identified and summarized. The weld-bonded joints were mechanically pre-treated, and weld-bonded as flanged single-overlap and cross-tension specimens. The results were compared with spot welded specimens of identical configuration. The weld-bonded specimens have better fatigue properties than spot welded specimens.
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| 3. |
- Ring-Groth, Margareta, et al.
(författare)
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Weldbonding of stainless steel : An introduction
- 1998
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Ingår i: Journal of Advanced Materials. - 1070-9789. ; 30:1, s. 36-39
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Tidskriftsartikel (refereegranskat)abstract
- Weldbonding is a method which combines the best mechanical features of resistance spot welding and adhesive bonding. For adhesive users, the technique simplifies the curing stage since no fixtures are needed for the period when the adhesive develops handling strength, and for spot weld users, the technique gives a joint a better mechanical properties and a sealed joint line. The bonds created are similar to normal spot welds but the joint is constrained by the adhesive at the interface. The adhesive is not present in the area surrounding the spot weld, since the heat generated between the stainless steel sheets burns the adhesive in that area
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| 4. |
- Nilsson, Annika, et al.
(författare)
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Finite-element simulation of V-die bending: A comparison with experimental results
- 1997
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Ingår i: Journal of Materials Processing Technology. - : Elsevier BV. - 0924-0136 .- 1873-4774. ; 65, s. 52-58
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Forskningsöversikt (refereegranskat)abstract
- A major problem in sheet bending is to compensate for springback. Analytical descriptions are not sufficiently general to accommodate influences from the material and the geometry due to the simplifications that have to be made. Practical experiments are still needed to be able to compensate for springback. The aim of this work has been to test the finite-element method on its abilities to predict springback for free bending in a V-die. The work shows that the finite-element method can be used to predict springback off-line. The true stress-true strain curve from a tensile test is used as the material description. Springback has been studied for eight different materials of varying thickness. The process has been simulated with the code Nike2d and the results from the simulations compared with those from experiments, good correlation between the simulations and the experiments being achieved. © 1997 Elsevier Science S.A.
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| 5. |
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| 6. |
- Andersson, Roger, et al.
(författare)
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Formability behaviour of meta-stable stainless steels
- 2005
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Ingår i: Proceedings of the 8th ESAFORM Conference on Material Forming. - Bucharest : The Romanian Academy Publishing House. - 9732711736 ; , s. 359-362
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Konferensbidrag (refereegranskat)
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| 7. |
- Andersson, Roger, et al.
(författare)
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Stainless steel components in automotive vehicles
- 2004
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Ingår i: Stainless Steel World. - 1383-7184. ; 16:1, s. 34-37
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Components linked to crash safety in automotive vehicles are required to transmit or absorb energy. The energy absorbing capability of a given component depends on a combination of geometry, material properties and loading conditions. Increased crash performance can be obtained by using materials with higher yield strength and relatively high elongation to fracture. These demands have led to increasing interest in the use of high strength stainless steels due to their relatively high elongation to fracture and good formability. To increase knowledge of the formability and forming behaviour of these materials, several components from current and prototype vehicles have been made using high strength stainless steels at Volvo Cars Body Components, Olofstrom, Sweden. These were subsequently analysed in close collaboration with the Division of Manufacturing Systems Engineering at Lulea University of Technology, Sweden.
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| 8. |
- Andersson, Roger, et al.
(författare)
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The applicability of stainless steels for crash absorbing components
- 2002
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Ingår i: ACOM : Avesta Sheffield corrosion management and application engineering. - 400 Commonwealth Drive, Warrendale, PA, United States : SAE International. - 1101-0681. ; 3-4, s. 7-12
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- To increase crash performance in automotive vehicles it is necessary to use new techniques and materials. Components linked to crash safety should transmit or absorb energy. The energy absorbing capability of a specific component is a combination of geometry and material properties. For these components the chosen material should have high yield strength and relatively high elongation to fracture. These demands have led to increasing interest in the use of high strength stainless steels. The relative performance of three high strength carbon steels and two high strength stainless steel grades was evaluated through intrinsic and simulative tests. The rear bumper for a Volvo Car model in current production was manufactured using the five sheets tested to verify formability and behaviour under load. The bumpers were clamped in a rig that allowed quasi-static impact tests to be made. The energy absorbing capabilities were evaluated by measuring force versus displacement during the impact test.
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| 9. |
- Andersson, Roger, et al.
(författare)
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Using stainless steel for energy absorbing components in automobiles
- 2001
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Ingår i: Innovations in processing and manufacturing of sheet materials. - Warrendale, Pa : Minerals, Metals & Materials Society. - 873394909 ; , s. 97-110
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Konferensbidrag (refereegranskat)abstract
- To increase the crash performance in automobiles it is necessary to use new techniques and materials. To produce energy absorbing components the material should have high yield strength, high elongation to fracture and strong work hardening. The total work a component absorbs during impact is the area under the stress-strain curve for unit material volume. This has lead to an interest in high strength stainless steels as crash safety components in automobiles due to their excellent material properties. The material performance of different stainless grades has been evaluated through intrinsic and simulative tests. A stainless steel bumper beam has been optimised for a VOLVO car and comparisons have been made with the present application. Simulations have been done and verified by experiments.
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| 10. |
- Asnafi, Nader, et al.
(författare)
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On formability of sheet aluminium
- 1990
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Ingår i: Sheet metals in forming processes. - Borlänge : Materials Center, HTM. ; , s. 81-91
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Konferensbidrag (refereegranskat)abstract
- Sheet metal behaves differently for different stress and strain ratios. For instance, the material tolerates less deformation at plane strain compared with uniaxial tension. Hill's yield criteria can be used to describe sheet material's deformation behavior. Hill's original yield criterion for plane stress, assuming that there is no planar anisotropy is given. The equation shows better agreement with experimental results when r > 1 (steel 4010), while there is no agreement with experimental results when r < 1 (Al-5052). Hill proposed, therefore, a new yield criterion, which is given. The value of a can be determined by comparing the experimental work-hardening characteristics for uniaxial tension and balanced biaxial tension; 1 < = a < = 2. For soft Al, having an average r-value of 0.723, the value of a has been found to be 1.8. The parameter a has its greatest effect at balanced biaxial tension. Graphs
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