Use of Unsymmetric Finite element Method in Impact Analysis of Composite Laminates
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
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| Title |
Use of Unsymmetric Finite element Method in Impact Analysis of
Composite Laminates
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| Creator |
Kumar, Surendra
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| Subject |
Finite Element Analysis
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| Description |
The use of metric trial functions to represent the real stress field in what is called the unsymmetric
finite element formulation proposed recently is an effective way to improve predictions from distorted
finite elements. This approach works surprisingly well because the use of parametric functions for the
test functions satisfies the continuity conditions while the use of metric (Cartesian) shape functions for
the trial functions ensures that the stress representation during finite element computation can retrieve
in a best-fit manner, the actual variation of stress in the metric space. However the formulation so far
has only been applied to static problems in the literature and a dynamic problem of composite
structure has not been addressed. In this paper, the impact response in a composite laminate
subjected to a transverse impact by a metallic impactor is investigated using a three-dimensional
layered 20 noded hexahedral unsymmetric finite element formulation. Some example problems of
graphite/epoxy laminate (plate as well as cylindrical shell) are considered and the impact-induced
response is analysed using the above formulation. The performance comparison of this unsymmetric
element is made vis-à-vis conventional symmetric 8-noded and 20-noded hexahedral finite elements.
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| Publisher |
CSIR Centre for Mathematical Modelling and Computer Simulation
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| Date |
2010-03
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| Type |
Monograph
NonPeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/284/1/TRUnsymmetric20Noded.pdf
Kumar, Surendra (2010) Use of Unsymmetric Finite element Method in Impact Analysis of Composite Laminates. Technical Report. CSIR Centre for Mathematical Modelling and Computer Simulation , C-MMACS,Bangalore 560037,India. (Unpublished) |
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| Relation |
http://cir.cmmacs.ernet.in/284/
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