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Anisotropic material modeling and impact simulation of a brush cutter casing made of a short fiber reinforced plastic
Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, The Institute of Technology.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

A popular way to reduce weight in industrial products without compromising the strength or stiffness is to replace components made of metal by plastics that have been reinforced by glass fibers. When fibers are introduced in a plastic, the resulting composite usually becomes anisotropic, which makes it much more complex to work with in simulation software. This thesis looks at modeling of such a composite using the multi-scale material modeling tool Digimat.

An injection molding simulation of a brush cutter casing made of a short fiber reinforced plastic has been performed in order to obtain information about the glass fiber orientations, and thus the anisotropy, in each material point. That information has then been transferred over from the injection mesh to the structural mesh via a mapping routine. An elasto-viscoplastic material model with failure has been employed and calibrated against experimental data to find the corresponding material parameters. Lastly, a finite element analysis simulating a drop test has been performed. The results from the analysis have been compared with a physical drop test in order to evaluate the accuracy of the methodology used. The outcome has been discussed, conclusions have been drawn and suggestions for further studies have been presented.

Place, publisher, year, edition, pages
2014. , 47 p.
Keyword [en]
anisotropic material modeling, short fiber reinforced plastics, impact simulation, Digimat, LS-DYNA
National Category
Applied Mechanics
URN: urn:nbn:se:liu:diva-107671ISRN: LIU-IEI-TEK-A--14/01935--SEOAI: diva2:726445
External cooperation
Dynamore Nordic AB
Subject / course
Mechanical Engineering
Available from: 2014-08-27 Created: 2014-06-18 Last updated: 2014-08-27Bibliographically approved

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Norman, Oskar
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Solid MechanicsThe Institute of Technology
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