| 1. |
- Carlson, Tony, et al.
(författare)
-
CFRP structural capacitor materials for automotive applications
- 2011
-
Ingår i: Plastics, rubber and composites. - 1465-8011 .- 1743-2898. ; 40:6/7, s. 311-316
-
Konferensbidrag (refereegranskat)abstract
- In this paper, an approach towards realising novel multifunctional polymer composites is presented. A series of structural capacitor materials made from carbon fibre reinforced polymers have been developed, manufactured and tested. The structural capacitor materials were made from carbon fibre epoxy prepreg woven lamina separated by a polymer film dielectric separator. The structural capacitor multifunctional performance was characterised measuring capacitance, dielectric strength and tearing force. The developed structural carbon fibre reinforced polymer (CFRP) capacitor designs employing polymer film dielectrics (PA, PC and PET) offer remarkable multifunctional potential. © Institute of Materials, Minerals and Mining 2011.
|
|
| 2. |
- Carlson, Tony, et al.
(författare)
-
Structural capacitor materials made from carbon fibre epoxy composites
- 2010
-
Ingår i: Composites Science And Technology. - : Elsevier BV. - 0266-3538 .- 1879-1050. ; 70:7, s. 1135-1140
-
Tidskriftsartikel (refereegranskat)abstract
- In this paper, an approach towards realising novel multifunctional polymer composites is presented. A series of structural capacitor materials made from carbon fibre reinforced polymers have been developed, manufactured and tested. The structural capacitor materials were made from carbon fibre epoxy pre-preg woven laminae separated by a paper or polymer film dielectric separator. The structural capacitor multifunctional performance was characterised measuring capacitance, dielectric strength and interlaminar shear strength. The developed structural CFRP capacitor designs employing polymer film dielectrics (PA, PC and PET) offer remarkable multifunctional potential. © 2010 Elsevier Ltd.
|
|
| 3. |
- Ekstedt, Sofia, et al.
(författare)
-
Structural batteries made from fibre reinforced composites
- 2009
-
Ingår i: ICCM 17, Edinburgh. - London : IOM Communications.
-
Konferensbidrag (refereegranskat)abstract
- Structural, fibre reinforced, battery prototypes with two types of electrolyte matrix material, a gel and a solid polymer, have been manufactured. This was to confirm the concept of using carbon fibres as current collector in the anode as well as providing a mechanical load-carrying functionality. As a result, functioning batteries with gel electrolyte have been produced and their properties have been characterised.
|
|
| 4. |
- Ekstedt, Sofia, et al.
(författare)
-
Structural batteries made from fibre reinforced composites
- 2010
-
Ingår i: Plastics, rubber and composites. - 1465-8011 .- 1743-2898. ; 39:3-5, s. 148-150
-
Konferensbidrag (refereegranskat)abstract
- Structural, fibre reinforced, battery prototypes with two types of electrolyte matrix material (a gel and a solid polymer) have been manufactured. This was to confirm the concept of using carbon fibres as current collector in the anode as well as providing a mechanical load-carrying functionality. As a result, functioning batteries with gel electrolyte have been produced and their properties have been characterised. © 2010 Maney Publishing.
|
|
| 5. |
- Farajzadeh Khosroshahi, S., et al.
(författare)
-
Response of a helmet liner under biaxial loading
- 2018
-
Ingår i: Polymer testing. - : Elsevier BV. - 0142-9418 .- 1873-2348. ; 72, s. 110-114
-
Tidskriftsartikel (refereegranskat)abstract
- Helmets are the most effective protective item for motorcyclists. The liner of the helmet is the part of the helmet which dissipates most of the impact energy and mitigates the risk of head injuries. It has been proposed that the helmet test standards should include assessment of the helmets for oblique impacts that is not currently addressed in the standards. A conventional uniaxial compression test method is still used for characterization of the helmet liner material. However, compressive tests of EPS foams provide reliable results for normal loading on EPS, but do not provide a realistic result for oblique impacts. Therefore, we carried out experimental tests to measure the response of EPS foams, which are commonly used for helmet liners, under biaxial loading. The result of our experiments show that the shear response of EPS foams is a function of axial compression, and increasing the axial strain leads to increased shear stiffness, and thus higher levels of shear stress. We also showed that including shear-stiffening of EPS in the FE assessment of helmets may change the headform rotational acceleration by 25%. Therefore, such behavior of EPS foams should be included in FE analysis of helmets in the case of oblique impacts for a more realistic assessment of their performance.
|
|
| 6. |
- Francis, Sachin, 1991, et al.
(författare)
-
Characterisation of tape-based carbon fibre thermoplastic discontinuous composites for energy absorption
- 2021
-
Ingår i: Plastics, rubber and composites. - : Taylor and Francis Ltd.. - 1465-8011 .- 1743-2898. ; 50:7, s. 351-
-
Tidskriftsartikel (refereegranskat)abstract
- Tape-based discontinuous composite is a relatively new type of composite material that offers improved mechanical properties for similar process-ability compared to Sheet Moulding Compound or Bulk Moulding Compound. This makes it potentially attractive for the automotive industry. In this paper, a thin-ply carbon fibre reinforced polypropylene-based discontinuous composite is studied. Mechanical tests are performed to obtain the tensile, compression and shear behaviour of the material. The energy absorption via tearing is also studied to assess the suitability of the material for energy absorption applications, such as crash-boxes. The tearing test results show a large degree of plastic deformation and an advancing damage front leading to higher specific energy absorption via tearing compared to conventional composite materials. © 2021 The Author(s).
|
|
| 7. |
- Larijani, Nasim, et al.
(författare)
-
Metal onto polymer composite casting: Degradation behaviour and mechanical performance
- 2009
-
Konferensbidrag (refereegranskat)abstract
- A general three dimensional finite element model for modelling thermal degradation of polymer composites due to thermal loading is presented. In particular, the model is intended for modelling the thermal degradation of polymer composites due to "metal onto composites casting" with lightweight alloys. The model is implemented as a user defined subroutine into the general purpose FEpackage ABAQUS©. The applicability of the code was demonstrated by analysing the casting process of an aluminium alloy onto composite rods, resulting in a shrinkage fit. To succeed in manufacturing of this type of joint, a delicate balance between thermal loadings, metal shrinkage, composite degradation and the overall cooling must be met. The proposed subroutine together with finite element models provides the spatial distribution of these field variables, allowing for subsequent optimization of the assembly. In order to asses the quality of the composite/metal joints pull-out tests of cylindrical composite rods were performed and compared to numerical simulation predictions.
|
|
| 8. |
- Larsson, Ragnar, 1960, et al.
(författare)
-
Free surface flow and preform deformation in composites manufacturing based on porous media theory
- 2012
-
Ingår i: European journal of mechanics. A, Solids. - : Elsevier BV. - 0997-7538 .- 1873-7285. ; 31:1, s. 12-jan
-
Tidskriftsartikel (refereegranskat)abstract
- In the present contribution an infusion simulation tool is developed, applicable to a quite wide range of composites manufacturing technologies. The paper focusses on isothermal, infusion like manufacturing processes involving highly deformable preforms and a free surface resin flow. There are two major issues addressed at the modelling of the infusion processes: The first one is the highly deformable preform and its shape due to the interaction between external pressure loading and the intrinsic fluid pressure. The second issue concerns the migrating free surface due to resin infiltration into the fibrous preform. To resolve these both issues simultaneously, a compressible two-phase porous media formulation is put forward involving an additional liquid mass balance relationship as compared to the standard compressible porous media formulation. As a result a governing equation for saturation degree evolution is established, which is used to monitor the free surface problem directly in terms of the compressible continuum formulation traversing into incompressibility with increasing partial saturation degree. A staggered finite element based solution procedure is advocated for the total solution advancement, involving, on the one hand, the saturation dependent porous media formulation, and, on the other hand, the computation of the saturation degree. The proposed formulation has been implemented and numerical results are provided, showing the convergence of the staggered approach, and the assessment of the proposed approach against a 1D analytical model. In addition, the infusion of a "hat" beam is considered. © 2011 Elsevier Masson SAS. All rights reserved.
|
|
| 9. |
|
|
| 10. |
|
|
