Damage. Visco-elastic. Visco- plastic. L. Rozite and R. Joffe Luleå University of Technology, S-97187 Luleå, SWEDEN. www.ltu.se [email protected]
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L. Rozite and R. JoffeLuleå University of Technology, S-97187 Luleå, SWEDEN
The Objective ofthis study was to analyze nonlinear behavior of flax fiber bio-based polymers composites. Influence of moisture also has been analyzed.
Scanning electron microscope images for PLA-NF10 (left), Lignin/FL30 (middle) and for comparison viscose fiber composite PLA-VF5 (right)
SummaryMaterial model was developed assuming that possible sources of the observed behavior may be microdamage related stiffness reduction, nonlinear viscoelasticity as well as viscoplasticity. The model was rewritten in an incremental form where stress is a function of strain to simulate strain controlled tests. The simulated stress-strain curves in tensile test showed satisfying agreement with experimental data. Increase of moisture level in material decreases mechanical properties of composite.
AcknowledgmentFinancial support by EU sixth framework programme project “New class of engineering composite materials from renewable resources”, BIOCOMP. Specimens were supplied by Tecnaro (Germany).
17th International Conference on Mechanics of Composite Materials, May 8 – June 1, 2012, Riga, Latvia