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Published on: September 15, 2023
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Reinforcements in avian wing bones: Experiments, analysis, and modeling.
E Novitskaya1, C J Ruestes2, M M Porter3
1Department of Mechanical and Aerospace Engineering and Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA.
Summary
Bird wing bones feature internal structures that enhance strength and stiffness while minimizing weight for flight. These adaptations, including struts and ridges, improve resistance to bending and twisting forces.
Area of Science:
- Biomechanics
- Paleontology
- Evolutionary Biology
Background:
- Modern birds possess wings adapted for flight, requiring strong yet lightweight skeletal structures.
- Internal bone morphology, including struts and ridges, varies across species based on wing usage.
- These adaptations are crucial for withstanding flight-related forces like takeoff, flight, and landing.
Purpose of the Study:
- To investigate the role of internal structures in bird wing bones for mechanical competency.
- To understand how morphology and internal features contribute to flexural and torsional resistance.
- To validate the concept of reinforcing struts through 3D-printed prototypes.
Main Methods:
- Analysis of cross-sectional morphology and internal reinforcing structures in bird wing bones.
- Mechanical testing of 3D-printed strut prototypes under compression and torsion.
- Development of an elastic model for reinforced circular rings.
Main Results:
- Internal structures increase resistance to flexure and torsion with minimal weight increase.
- 3D-printed struts reduced ovalization (a measure of deformation) under compression.
- Struts did not significantly affect torsional resistance in the tested prototypes.
Conclusions:
- Internal structural adaptations in bird wings are key to achieving flight efficiency.
- Reinforcing struts offer a viable strategy for enhancing bone compressive strength.
- Further research can explore optimizing strut design for avian skeletal mechanics.
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