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Effect of strain ra...
Effect of strain rate at compressive and tensile loading of unidirectional plies in structural composites
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- Singh, Vivekendra, 1987 (författare)
- RISE,SICOMP,Chalmers University of Technology, Sweden
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- Larsson, Ragnar, 1960 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chalmers Univiversity of Technology, Sweden
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- Marklund, Erik (författare)
- RISE,SICOMP
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- Olsson, Robin, 1958 (författare)
- RISE,SICOMP,Chalmers University of Technology, Sweden
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(creator_code:org_t)
- European Community on Computational Methods in Applied Science (ECCOMAS), 2019
- 2019
- Engelska.
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Ingår i: PROCEEDINGS - 7th ECCOMAS THEMATIC CONFERENCE ON THE MECHANICAL RESPONSE OF COMPOSITES. - : European Community on Computational Methods in Applied Science (ECCOMAS).
- Relaterad länk:
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http://composites201...
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https://research.cha...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Fibre-reinforced polymer composites are widely used in structural applications due to their high specific stiffness and strength. In some applications the response of dynamically loaded composite components must be analysed. For example, in crash analyses of structural components, where very high loading rates occurs, the composite behaviour is not fully understood. For this, we present a novel transversely isotropic viscoelastic-viscoplastic constitutive model for a unidirectional carbon-epoxy composite. The model is micromechanically motivated so that the matrix and fibre materials of the composite are treated as micromechanical constituents at the ply scale. Based on the Hill-Mandel condition, the phases are homogenized via the macroscopic and fluctuating strain fields. To arrive at a simple but still representative model, a simplistic ansatz is applied to the structure of the fluctuating strains leading to a non-standard homogenized response of the composite. The model is applied to the non-linear rate dependent anisotropic ply behaviour under quasi-static and dynamic loading at different off-axis angles. For a simple viscoelastic-viscoplastic prototype for the rate dependent matrix response, there is a good correlation between measured and model response of the IM7-8552 material system in compression and tension.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Kompositmaterial och -teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Composite Science and Engineering (hsv//eng)
Nyckelord
- Unidirectional composites
- Strain rate effects
- Constitutive model
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)