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Topology Optimization for FDM Parts Considering the Hybrid Deposition Path Pattern
Shuzhi Xu1, Jiaqi Huang2, Jikai Liu2
1Department of Mechanical Engineering, University of Alberta, Edmonton, AB T2G 2G8, Canada.
Micromachines
|July 26, 2020
Summary
This study introduces a new method for optimal structure design in 3D printing, considering material properties and deposition paths. The approach ensures optimized designs for fused deposition modeling (FDM) by integrating boundary and substrate structures.
Area of Science:
- Mechanical Engineering
- Materials Science
- Computational Mechanics
Background:
- Additive manufacturing processes like fused deposition modeling (FDM) require optimized designs for anisotropic materials.
- Traditional design methods often overlook the influence of specific deposition path patterns on structural integrity.
- Developing robust methodologies for topology optimization that incorporate manufacturing constraints is crucial.
Purpose of the Study:
- To propose a novel methodology for optimal structure design considering hybrid deposition path (HDP) patterns and anisotropic material properties.
- To develop an optimized structure comprising a boundary layer and a substrate with tailored infill patterns.
- To validate the proposed method's effectiveness in achieving optimal structural designs.
Main Methods:
- Utilizing a solid orthotropic material with penalization (SOMP) approach.
- Implementing a double smoothing and projection (DSP) technique for design refinement.
- Incorporating hybrid deposition path (HDP) patterns, including unidirectional zig-zag and contour offset paths.
- Employing a critical derivative of sensitivity analysis to ensure design optimality.
Main Results:
- Successfully generated optimized 2D structures with distinct boundary and substrate regions.
- Demonstrated the integration of anisotropic material properties and HDP patterns into the optimization process.
- Validated the proposed methodology through numerical examples, confirming its effectiveness.
Conclusions:
- The proposed methodology effectively optimizes structure design for fused deposition modeling (FDM) by considering anisotropic material properties and hybrid deposition paths (HDP).
- The integration of SOMP, DSP, and HDP provides a robust framework for achieving high-performance additive manufactured components.
- The validated approach offers a significant advancement in computational design for additive manufacturing.
