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This paper examines how polyamide 12 (PA12) behaves when exposed to shear stress. PA12 is a strong, versatile thermoplastic which is widely used in many industries. This research aims to better understand how PA12 reacts to shear-induced stress. Samples are produced on an industrial scale EOS P396 SLS-machine with a robust and well-proven parameter set. The study includes tests with two different shear specimens under several excitation speeds and relaxation tests, to characterize the viscoelastic properties. Digital image correlation is used for precise deformation measurements. A modeling approach combining viscoelasticity and endochronic plasticity is presented to map the inelastic effects. These models are implemented in MATLAB, providing precise simulations that confidently predict the mechanical material behavior.

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Material Modeling of Selective Laser Sintered Polyamid 12 for the Deviatoric Stress State

  • 章节

  • 发表日期：

    2025年

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  • Dominik Hahne,
  • Alexander Lion,
  • Michael Johlitz

摘要

This paper examines how polyamide 12 (PA12) behaves when exposed to shear stress. PA12 is a strong, versatile thermoplastic which is widely used in many industries. This research aims to better understand how PA12 reacts to shear-induced stress. Samples are produced on an industrial scale EOS P396 SLS-machine with a robust and well-proven parameter set. The study includes tests with two different shear specimens under several excitation speeds and relaxation tests, to characterize the viscoelastic properties. Digital image correlation is used for precise deformation measurements. A modeling approach combining viscoelasticity and endochronic plasticity is presented to map the inelastic effects. These models are implemented in MATLAB, providing precise simulations that confidently predict the mechanical material behavior.