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Modelling Influence on Bending Behaviour Simulation of the Poly(Lactic Acid) Structures, 3D Printed.
Dorin-Ioan Catana1, Denisa-Iulia Brus2, Mihai-Alin Pop3
1Department of Materials Engineering and Welding, Transilvania University of Brasov, 500036 Brasov, Romania.
Polymers
|February 28, 2023
Summary
Complex loading models improve 3D printed structure bending simulations, though simple models are faster. High elasticity in some 3D printed parts, influenced by cross-section shape and test arrangement, causes simulation errors in deformation predictions.
Area of Science:
- Materials Science
- Mechanical Engineering
- Additive Manufacturing
Background:
- 3D printing enables complex geometries but requires accurate simulation for performance prediction.
- Bending behavior analysis is crucial for structural integrity of 3D printed components.
- Poly(lactic) acid and its composites are common 3D printing materials with varying mechanical properties.
Purpose of the Study:
- To investigate the impact of different loading modeling approaches on the simulation accuracy of 3D printed structures under bending.
- To compare the effectiveness of simple (schematized) versus complex loading models in predicting bending behavior.
- To identify sources of discrepancies between simulated and experimental results, particularly concerning deformation.
Main Methods:
- Simulating the bending behavior of 3D printed bar and tube structures with varying cross-sectional geometries.
- Utilizing two loading modeling approaches: simple schematization and complex simulation.
- Employing poly(lactic) acid and glass fiber-reinforced poly(lactic) acid as printing materials.
- Comparing simulation results (Von Mises stresses, deformations) with experimental test data.
Main Results:
- Complex loading models provide more accurate predictions of bending behavior compared to simple models.
- Simulated Von Mises stresses align well with experimental data, with a slight edge for complex modeling.
- Simulation errors in deformation prediction are attributed to the inherent high elasticity of certain 3D printed structures.
- High elasticity is influenced by the cross-sectional geometry and the structural arrangement during bending tests.
Conclusions:
- The choice of loading modeling significantly influences the accuracy of bending behavior simulations for 3D printed structures.
- Complex loading models enhance simulation fidelity but increase computational time.
- Understanding and accounting for material and structural elasticity are critical for accurate deformation prediction in 3D printed components.
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