Short answer
When designing lattice structures for powder bed fusion, prioritize simpler geometries and larger features where possible, or use design rules and simulation to anticipate and mitigate defects arising from complex designs.
- Field
- Modelling
- Source
- The International Journal of Advanced Manufacturing Technology (2019)
- Method
- Literature Review
- Evidence
- Strong effect
The geometric complexity and design parameters of lattice structures directly influence the occurrence and severity of manufacturing defects like dimensional inaccuracies, surface roughness, and porosity when produced via powder bed fusion. This modelling research insight is drawn from a 2019 study published in The International Journal of Advanced Manufacturing Technology. Using Literature review, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing lattice structures for powder bed fusion, prioritize simpler geometries and larger features where possible, or use design rules and simulation to anticipate and mitigate defects arising from complex designs.
Lattice structure design significantly impacts defect formation in powder bed fusion manufacturing
The geometric complexity and design parameters of lattice structures directly influence the occurrence and severity of manufacturing defects like dimensional inaccuracies, surface roughness, and porosity when produced via powder bed fusion.
The International Journal of Advanced Manufacturing Technology · 2019
Key Findings
- 01Lattice design parameters (e.g., strut thickness, cell geometry) are primary drivers of dimensional inaccuracies and surface texture deviations.
- 02Higher lattice complexity and finer features increase susceptibility to internal and external porosity.
- 03Design constraints and careful selection of process parameters can help minimize defect formation.
Application
Design takeaway
When designing lattice structures for powder bed fusion, prioritize simpler geometries and larger features where possible, or use design rules and simulation to anticipate and mitigate defects arising from complex designs.
How to apply
Before finalizing a lattice design, use simulation software to predict potential areas of poor surface finish, dimensional deviation, or porosity. Adjust the lattice parameters or consider design modifications based on these predictions.
Project actions
- 01When designing lattice structures, consider how the software will slice and build the model, as this can influence defect formation.
- 02If possible, use CAD software with simulation capabilities to predict potential issues before printing.
Method & Evidence
Variables
Strengths & Limitations
Strengths
- +Provides a comprehensive overview of defect types and their relationship with lattice design.
- +Highlights the importance of considering design constraints and process parameters for defect mitigation.
Limitations
The specific types and severity of defects can vary greatly depending on the exact powder bed fusion machine, material used, and the specific process parameters chosen, which may not be fully covered in a general review.
Reliability & validity
The reliability of findings depends on the consistency of defect reporting across the reviewed studies. Validity is enhanced by the focus on established defect types and their correlation with design features, though specific quantitative relationships may vary.
Think critically
How can computational modelling and simulation be further integrated into the design workflow for lattice structures to predict and compensate for defects before physical prototyping?
Design Principles
"Design for Additive Manufacturing: Lattice structure geometry must be optimized considering the inherent limitations and defect-generating tendencies of the chosen additive manufacturing process."
Understanding these relationships is crucial for designers and engineers aiming to leverage the benefits of lattice structures. By considering how design choices affect manufacturability, designers can proactively mitigate defects, leading to more reliable and higher-performing components in demanding applications.
What This Means for Your Design
The shape and size of the holes you design into a structure can cause problems like it not being the exact size you wanted, having a rough surface, or having unwanted gaps when you 3D print it using powder bed fusion.
How to use in your project
- 1.Reference this paper when discussing the challenges of manufacturing complex geometries like lattices, and how design choices influence outcomes.
- 2.Use the findings to justify design decisions aimed at minimizing defects in your own lattice structure prototypes.
Add to My Project
Quick Cite
Paragraph starter
The design of lattice structures for powder bed fusion is intrinsically linked to the potential for manufacturing defects. Research indicates that geometric features such as strut diameter, cell topology, and overall complexity significantly influence dimensional accuracy, surface finish, and internal porosity. Therefore, a critical aspect of designing functional lattice structures involves anticipating and mitigating these defect-generating tendencies through careful parameter selection and potentially simplified geometric approaches.
Source
The International Journal of Advanced Manufacturing Technology
Review of defects in lattice structures manufactured by powder bed fusion
journal · 2019
View sourceQuestions About This Research
- What does the research say about lattice structure design significantly impacts defect formation in powder bed fusion manufacturing?
- When designing lattice structures for powder bed fusion, prioritize simpler geometries and larger features where possible, or use design rules and simulation to anticipate and mitigate defects arising from complex designs. Evidence: The International Journal of Advanced Manufacturing Technology (2019).
- Why does "Lattice structure design significantly impacts defect formation in powder bed fusion manufacturing" matter for design?
- Understanding these relationships is crucial for designers and engineers aiming to leverage the benefits of lattice structures. By considering how design choices affect manufacturability, designers can proactively mitigate defects, leading to more reliable and higher-performing components in demanding applications.
- How can designers apply this research?
- When designing lattice structures for powder bed fusion, prioritize simpler geometries and larger features where possible, or use design rules and simulation to anticipate and mitigate defects arising from complex designs.
- What were the main findings?
- Lattice design parameters (e.g., strut thickness, cell geometry) are primary drivers of dimensional inaccuracies and surface texture deviations.. Higher lattice complexity and finer features increase susceptibility to internal and external porosity.. Design constraints and careful selection of process parameters can help minimize defect formation.
- What research method was used?
- Literature Review.
- How strong is the evidence?
- Evidence strength is rated Strong effect, based on a 2019 journal from The International Journal of Advanced Manufacturing Technology.
- What should I do differently in my next project?
- Before finalizing a lattice design, use simulation software to predict potential areas of poor surface finish, dimensional deviation, or porosity. Adjust the lattice parameters or consider design modifications based on these predictions.
- What are the limitations?
- The review synthesizes findings from various studies, which may have used different materials, machines, and process parameters, leading to potential variability in observed defect types and severity.