FDM Layering Deposition Effects on Mechanical Response of TPU Lattice Structures

Area of Science:

• Additive Manufacturing
• Materials Science
• Mechanical Engineering

Background:

• Fused Deposition Modeling (FDM) is increasingly used for complex part manufacturing with thermoplastics like TPU.
• Current FDM applications are primarily for prototyping, necessitating research into functional part capabilities.
• Expanding material use in FDM is crucial for broader industrial adoption.

Purpose of the Study:

• To evaluate phenomena affecting the mechanical properties of FDM-printed lattice structures.
• To analyze three distinct lattice structure configurations derived from unit cells.
• To identify FDM process parameters that impact mechanical performance.

Main Methods:

• Experimental analysis of additively manufactured lattice structures.
• Numerical simulations to assess mechanical behavior.
• Comparative study of different lattice configurations and FDM process parameters.

Main Results:

• Several FDM process parameters were identified as negatively impacting mechanical properties by up to 50% compared to isotropic solids.
• The study correlated specific FDM parameters with reduced mechanical performance in lattice structures.
• Optimal parameter configurations for enhanced mechanical response were determined through numerical analysis.

Conclusions:

• FDM process parameters significantly influence the mechanical properties of printed lattice structures.
• Understanding and controlling these parameters is vital for improving the functional performance of FDM parts.
• Numerical analysis provides a valuable tool for optimizing FDM processes for specific mechanical requirements.