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Related Concept Videos

Problem Solving on Stress and Strain01:22

Problem Solving on Stress and Strain

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Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
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Simulation of Starch Gel Printing and Deformation Process Using COMSOL.

Zhou Qin1, Zhihua Li1, Xiaobo Zou1

  • 1Agricultural Product Processing and Storage Lab, School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.

Foods (Basel, Switzerland)
|March 28, 2024
PubMed
Summary

3D printing of food materials like starch gels can be simulated to predict shape changes. This study used COMSOL Multiphysics to model deformation, finding that larger aspect ratios minimize unwanted warping during printing and heating.

Keywords:
3D printingdeformationhigh temperaturesimulationstarch gelwarpage

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Area of Science:

  • Food Science and Technology
  • Materials Science
  • Additive Manufacturing

Background:

  • 3D printing in the food industry offers significant potential but lacks comprehensive studies on shape changes and deformation modeling.
  • Current research often overlooks the simulation of deformation, focusing primarily on material composition and printing parameters.
  • Residual stresses from additive manufacturing (AM) can alter dimensions and mechanical properties, necessitating predictive modeling.

Purpose of the Study:

  • To address the gap in simulating food product deformation during 3D printing and subsequent environmental exposure.
  • To analyze the physical properties and heat distribution of starch gel during the 3D printing process using simulation software.
  • To investigate the impact of varying aspect ratios on shape changes and deformation of 3D printed food models.

Main Methods:

  • Detailed simulation of starch gel printing and deformation using COMSOL Multiphysics 6.2 software.
  • Analysis of material physical properties, heat distribution, solid heat transfer, and solid mechanics.
  • Design and simulation of three part models with different aspect ratios, subjected to an 80 °C environment, using the generalized Maxwell model.
  • Utilized Nuclear Magnetic Resonance (NMR) and rheological characterization to complement simulation findings.

Main Results:

  • Simulation accurately predicted stress and deformation, aligning with experimental outcomes.
  • Model No. 1, featuring the largest aspect ratio in a gel-PET plastic membrane bilayer structure, demonstrated uniform bending and minimal edge warpage at 80 °C.
  • Models No. 2 and No. 3 exhibited increasing degrees of edge warpage, with Model No. 3 showing the most pronounced deformation.

Conclusions:

  • The study successfully simulated and predicted the deformation behavior of 3D printed starch gel structures.
  • Aspect ratio is a critical design parameter influencing shape stability and minimizing warpage in 3D printed food products.
  • Simulation using COMSOL Multiphysics provides a valuable tool for optimizing 3D printed food product design, reducing material waste and research time.