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Background <p>XPHD (ex-Poro Hydrodynamic) lubrication has emerged as an innovative and eco-friendly solution to current lubricating systems. It uses a high porosity and highly compressible material impregnated with fluid to enhance the pressure generation mechanism of hydrodynamic bearings.</p> Objective <p>The objective of our work is to study the mechanical behavior of water-imbibed polymeric foams which can replace oil in hydrodynamic bearings. The behavior depends on the interactions happening between the fluid flow and the solid phase as the latter undergoes important compressive and shear loads.</p> Methods <p>In this study, a dedicated testing device was developed to reproduce loading conditions like in hydrodynamic bearings and Digital Image Correlation has been adapted to measure local strains at the scale of cells and observe the deformation mechanisms.</p> Results <p>As a first candidate, open-cell polyurethane foams imbibed with water were selected and tested in a range of compression ratios, speeds and geometries of the loading element.</p> Conclusions <p>The evolution of strain fields under these loading scenarios and the contribution of the pore pressure in the local deformations of cells and pores are discussed and highlighted to provide a better understanding of the coupled phenomena.</p>

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Investigation of Mechanical Behavior of Water-Imbibed Polymeric Foams Under Dynamic Shear-Compression Loading for Tribology Application

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • E. Laçaj,
  • P. Bourhis,
  • P. Doumalin,
  • J. Bouyer,
  • P. Jolly,
  • Y. Henry,
  • A. Fatu,
  • A. Beaudoin,
  • A-E. Ennazii,
  • B. Couderc

摘要

Background

XPHD (ex-Poro Hydrodynamic) lubrication has emerged as an innovative and eco-friendly solution to current lubricating systems. It uses a high porosity and highly compressible material impregnated with fluid to enhance the pressure generation mechanism of hydrodynamic bearings.

Objective

The objective of our work is to study the mechanical behavior of water-imbibed polymeric foams which can replace oil in hydrodynamic bearings. The behavior depends on the interactions happening between the fluid flow and the solid phase as the latter undergoes important compressive and shear loads.

Methods

In this study, a dedicated testing device was developed to reproduce loading conditions like in hydrodynamic bearings and Digital Image Correlation has been adapted to measure local strains at the scale of cells and observe the deformation mechanisms.

Results

As a first candidate, open-cell polyurethane foams imbibed with water were selected and tested in a range of compression ratios, speeds and geometries of the loading element.

Conclusions

The evolution of strain fields under these loading scenarios and the contribution of the pore pressure in the local deformations of cells and pores are discussed and highlighted to provide a better understanding of the coupled phenomena.