Design, Fabrication, Calibration, and Testing of a Centrifugal Ice Adhesion Test Rig with Strain Rate Control Capability

Douglass, Rebekah G.; Palacios, José; Schneeberger, Grant M.

doi:10.2514/6.2018-3342

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…This centrifuge test is one of the most repeatable ice adhesion tests, although it cannot produce stress-strain curves [8,17,18]. For larger facilities, the CAT is a common way to measure ice adhesion strength, often for impact ice types produced with a freezing drizzle or in-flight icing simulation [19][20][21][22][23][24][25][26][27][28][29][30][31]. At NTNU, the ice adhesion strength is measured with a vertical shear test (VST), as illustrated in Figure 3.…”

Section: Introductionmentioning

confidence: 99%

Interlaboratory Study of Ice Adhesion Using Different Techniques

et al. 2019

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Low ice adhesion surfaces are a promising anti-icing strategy. However, reported ice adhesion strengths cannot be directly compared between research groups. This study compares results obtained from testing the ice adhesion strength on the same surface at two different laboratories, testing two different types of ice with different ice adhesion test methods at temperatures of -10 o C and -18 o C. One laboratory uses the centrifuge adhesion test and tests precipitation ice and bulk water ice, while the other laboratory uses a vertical shear test and tests only bulk water ice. The surfaces tested were bare aluminum and a commercial icephobic coating, with all samples prepared in the same manner. The results showed comparability in the general trends, surprisingly, with the greatest differences for bare aluminum surfaces at temperature -10 o C. For bulk water ice, the vertical shear test resulted in systematically higher ice adhesion strength than the centrifugal adhesion test. The standard deviation depends on the surface type and seems to scale with the absolute value of the ice adhesion strength. The experiments capture the overall trends in which the ice adhesion strength surprisingly decreases from -10 o C to -18 o C for aluminum and is almost independent of temperature for a commercial icephobic coating. In addition, the study captures similar trends in the effect of ice type on ice adhesion strength as previously reported and substantiates that ice formation is a key parameter for ice adhesion mechanisms.

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Section: Introductionmentioning

confidence: 99%

Interlaboratory Study of Ice Adhesion Using Different Techniques

et al. 2019

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“…Researchers carried out the direct shear test, unconfined single-sided shear test, double-sided shear test, and confined single-sided shear test to measure the shear strength of ice [30,31]. Also, researchers designed a test rig and studied the influence of strain rate on shear adhesion strength of impact ice [32,33].…”

Section: Introductionmentioning

confidence: 99%

Method for Testing Shear and Tensile Strengths of Freshwater/Seawater Ice

Yongjie

Zhang

Guo

et al. 2022

Water

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When amphibious aircraft, ships, and other equipment perform tasks on the water, especially in winter or in low-temperature environments such as high latitudes, high altitudes, and polar regions, they will inevitably encounter icing problems which can adversely affect the safety and performance of these devices. In order to study the mechanical properties of freshwater and seawater ice, this paper tests and analyzes the tensile and shear strengths of static ice and proposes the test principle of shear and tensile strengths of static ice. It then designs and builds the corresponding test equipment, prepares the freshwater and seawater ice samples, and completes the tests. Experiments yield the shear and tensile strengths of freshwater and different seawater samples at various temperatures, and the temperature–strength curves are then drawn. The findings can provide technical support and valuable reference for anti-icing and de-icing design of water vehicles in low-temperature and hostile ocean environments.

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