动态剪切压缩载荷下吸水聚合物泡沫的力学行为研究及其摩擦学应用

IF 2.4 3区工程技术 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Experimental Mechanics Pub Date : 2025-08-08 DOI:10.1007/s11340-025-01216-8

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

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引用次数: 0

摘要

xphd（前波罗流体动力）润滑已成为当前润滑系统的创新和环保解决方案。它采用浸渍流体的高孔隙率和高可压缩性材料来增强流体动力轴承的压力产生机制。目的研究可替代油的吸水泡沫塑料在流体动力轴承中的力学性能。当固相承受重要的压缩和剪切载荷时，这种行为取决于流体与固相之间的相互作用。方法研制了一种用于再现流体动力轴承等加载条件的专用测试装置，并采用数字图像相关技术在单元尺度上测量局部应变，观察变形机制。作为第一个候选材料，我们选择了与水一起吸水的开孔聚氨酯泡沫，并在一系列压缩比、速度和加载元件的几何形状下进行了测试。结论讨论和强调了这些加载情景下应变场的演化以及孔隙压力对细胞和孔隙局部变形的贡献，以便更好地理解耦合现象。

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

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.

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来源期刊

Experimental Mechanics 物理-材料科学：表征与测试

CiteScore

4.40

自引率

16.70%

发文量

111

审稿时长

3 months

期刊介绍： Experimental Mechanics is the official journal of the Society for Experimental Mechanics that publishes papers in all areas of experimentation including its theoretical and computational analysis. The journal covers research in design and implementation of novel or improved experiments to characterize materials, structures and systems. Articles extending the frontiers of experimental mechanics at large and small scales are particularly welcome. Coverage extends from research in solid and fluids mechanics to fields at the intersection of disciplines including physics, chemistry and biology. Development of new devices and technologies for metrology applications in a wide range of industrial sectors (e.g., manufacturing, high-performance materials, aerospace, information technology, medicine, energy and environmental technologies) is also covered.