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Additive Manufactured Strain Sensor Using Stereolithography Method with Photopolymer Material.

Ishak Ertugrul1, Osman Ulkir2, Sezgin Ersoy3

  • 1Department of Mathematical Modelling, Kaunas University of Technology, 44138 Kaunas, Lithuania.

Polymers
|February 28, 2023
PubMed
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This study developed a 3D-printed strain sensor using flexible and conductive photopolymer resins. The sensor demonstrates a linear response and suitability for soft applications, showcasing additive manufacturing advancements.

Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Additive Manufacturing

Background:

  • Additive manufacturing (AM) technologies, including 3D printing, are evolving beyond rapid prototyping to large-scale production.
  • Strain sensors are crucial for monitoring deformation in various applications, particularly in soft materials where traditional sensors are unsuitable.

Purpose of the Study:

  • To fabricate and experimentally evaluate a novel 3D-printed strain sensor for direct use in soft applications.
  • To investigate the material properties and performance characteristics of the 3D-printed strain sensor.

Main Methods:

  • Fabrication of a 2 mm thick strain sensor using a Stereolithography (SLA) 3D printer.
  • Utilized photopolymer-based flexible and conductive ultraviolet (UV) resin materials for sensor construction.
Keywords:
3D printingadditive manufacturingphotopolymersoft applicationstereolithographystrain sensor

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  • Conducted experimental studies under loading/unloading conditions and tensile tests on material specimens.

    • Main Results:

    • A close linear relationship was observed between the strain applied to the sensor and its measured resistance.
    • Tensile strength data provides insights into the sensor's mechanical behavior and placement suitability.
    • The flexible nature of the 3D-printed sensor confirms its potential for diverse soft applications.

    Conclusions:

    • The developed 3D-printed strain sensor is a viable option for soft applications due to its linear response and flexible structure.
    • Additive manufacturing, specifically SLA, enables the creation of functional sensors with tailored material properties.
    • Further characterization of tensile strength is essential for optimizing sensor integration in specific soft systems.