Short answer

When designing for 3D printed components, especially those subjected to mechanical stress like UAV airframes, prioritize vertical print orientation and higher infill densities to maximize strength and reliability. For critical components, consider near-solid infill or explore advanced infill patterns.

Field: Final Production
Source: SHAREOK (University of Oklahoma) (2015)
Method: Experimental Testing
Evidence: Strong effect

The orientation of 3D prints and the density of internal infill are critical factors that dramatically influence the structural integrity of 3D printed components, particularly for applications like UAV airframes. This final production research insight is drawn from a 2015 study published in SHAREOK (University of Oklahoma). Using Experimental testing, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing for 3D printed components, especially those subjected to mechanical stress like UAV airframes, prioritize vertical print orientation and higher infill densities to maximize strength and reliability. For critical components, consider near-solid infill or explore advanced infill patterns.

Study

Final ProductionHigh ImpactStrong effect

3D Print Orientation and Infill Density Significantly Impact UAV Airframe Strength

SHAREOK (University of Oklahoma) · 2015

Key Findings

01Vertical print orientation resulted in significantly higher bending strength compared to horizontal orientation.
02Lower infill densities (20% and 50%) led to substantial reductions in both tensile and bending strength compared to solid prints.
03A 100% infill density with a 45° crisscross pattern achieved tensile performance comparable to conventionally fabricated ABS.
04The prototype UAV airframe demonstrated stable and controllable flight after printing and assembly.

Application

Design takeaway

How to apply

Before finalizing a design for a 3D printed part, conduct material property tests using the intended printing parameters to validate its suitability for the application's load conditions. Select print orientation and infill settings that align with the primary stress directions.

Project actions

01When testing materials for your design project, make sure to print test pieces using the exact same settings (orientation, infill) you plan to use for your final product.
02Document the print settings meticulously, as they directly influence the material properties you measure.

Method & Evidence

AimTo determine the effect of print orientation, infill density, infill pattern, and infill orientation on the structural properties (bending and tensile strength, modulus of elasticity) of 3D printed components for UAV airframes.

MethodExperimental Testing

ProcedureASTM-based bending and tensile tests were conducted on 3D printed specimens. Various print orientations, infill densities (20%, 50%, 100%), and infill patterns were systematically varied. Force and displacement data were recorded using a Vernier Structures & Materials Tester to calculate stress-strain diagrams, yield strength, maximum strength, and modulus of elasticity. A prototype UAV airframe ('Phoebe') was designed and printed to test practical application, followed by flight tests.

ContextAdditive Manufacturing (3D Printing) for Aerospace Components

Variables

IV["Print orientation (e.g., vertical, horizontal)","Infill density (e.g., 20%, 50%, 100%)","Infill pattern","Infill orientation"]

DV["Bending strength","Tensile strength","Yield strength","Modulus of elasticity"]

CV["Material (ABS)","3D printer model","Layer height","Print speed"]

Strengths & Limitations

Strengths

+Systematic investigation of key printing parameters.
+Practical application demonstrated through prototype UAV design and flight testing.

Limitations

The findings are specific to the material (ABS) and 3D printer used. Different materials and printers will yield different results. The study did not explore all possible infill patterns or orientations.

Reliability & validity

The study's reliability is supported by systematic testing of multiple variables and the use of standardized ASTM tests. Validity is enhanced by the practical application in a prototype UAV, demonstrating real-world relevance. However, the use of a single material and printer type might limit generalizability.

Think critically

How might the findings on print orientation and infill density influence the design of other complex 3D printed objects, such as medical implants or automotive parts, where different failure modes might be critical?

Design Principles

"Optimize additive manufacturing parameters (orientation, infill) to achieve desired material properties for specific functional requirements."

Understanding these material properties is crucial for designers and engineers when selecting appropriate printing parameters. Optimizing these settings can lead to stronger, more reliable, and potentially lighter components, directly impacting the performance and safety of manufactured products.

What This Means for Your Design

How you print a 3D object really matters! Printing it upright and filling it up more makes it much stronger, which is important if you want to build something like a drone that needs to be tough.

How to use in your project

1.Reference this study when discussing the material properties of your 3D printed components, particularly if you have varied print settings and observed differences in strength or performance.

Add to My Project

Quick Cite

Paragraph starter

The structural performance of 3D printed components is highly sensitive to manufacturing parameters such as print orientation and infill density. Research by Banfield (2015) demonstrated that vertical print orientation significantly enhanced bending strength, while lower infill densities (20-50%) led to substantial reductions in tensile and bending strength compared to solid prints. This highlights the critical need for designers to carefully select and validate these parameters to ensure the integrity and functionality of 3D printed parts in their design projects.

Source

SHAREOK (University of Oklahoma)

Design and development of a 3D printed UAV

journal · 2015

View source

Questions About This Research

What does the research say about 3d print orientation and infill density significantly impact uav airframe strength?: When designing for 3D printed components, especially those subjected to mechanical stress like UAV airframes, prioritize vertical print orientation and higher infill densities to maximize strength and reliability. For critical components, consider near-solid infill or explore advanced infill patterns. Evidence: SHAREOK (University of Oklahoma) (2015).
Why does "3D Print Orientation and Infill Density Significantly Impact UAV Airframe Strength" matter for design?: Understanding these material properties is crucial for designers and engineers when selecting appropriate printing parameters. Optimizing these settings can lead to stronger, more reliable, and potentially lighter components, directly impacting the performance and safety of manufactured products.
How can designers apply this research?: When designing for 3D printed components, especially those subjected to mechanical stress like UAV airframes, prioritize vertical print orientation and higher infill densities to maximize strength and reliability. For critical components, consider near-solid infill or explore advanced infill patterns.
What were the main findings?: Vertical print orientation resulted in significantly higher bending strength compared to horizontal orientation.. Lower infill densities (20% and 50%) led to substantial reductions in both tensile and bending strength compared to solid prints.. A 100% infill density with a 45° crisscross pattern achieved tensile performance comparable to conventionally fabricated ABS.. The prototype UAV airframe demonstrated stable and controllable flight after printing and assembly.
What research method was used?: Experimental Testing.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2015 journal from SHAREOK (University of Oklahoma).
What should I do differently in my next project?: Before finalizing a design for a 3D printed part, conduct material property tests using the intended printing parameters to validate its suitability for the application's load conditions. Select print orientation and infill settings that align with the primary stress directions.
What are the limitations?: The study focused on a specific material (ABS) and printer type; results may vary with different materials and technologies. The prototype airframe was a single iteration, and further optimization could be possible.