Stress-localized durable icephobic surfaces

Irajizad, Peyman; Al-Bayati, Abdullah; Eslami, Bahareh; Shafquat, Taha; Nazari, Mahsa; Jafari, Parham; Kashyap, Varun; Masoudi, Ali; Araya, Daniel; Ghasemi, Hadi

doi:10.1039/c8mh01291a

Cited by 149 publications

(161 citation statements)

References 42 publications

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“…Thus it could be concluded that when the same failure mode is prevailed, no loading mode dependency, or roughness dependency may be anticipated. However, this observation/conclusion should be further examined with polymer-based interfaces that might stimulate stress localization at the interface with inhomogeneous stress distribution at the submicron level [29]. A set of direct shear samples ranging with b=5-57 mm and push-out samples with b= 5-8 mm, were tested.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the dependency on the mode of interface loading is also critical, as tensile and shear strengths of the interface were reported to be different [12]. Moreover, the utilization of elastomeric icephobic surfaces has exposed the role of interfacial cavitation to reduce the shear strength of ice adhesion [27][28][29]. Cavitation is a primarily tension driven phenomenon [30]; thus, it is important to quantify the difference if any, between shear and tensile adhesion of the icesolid interface.…”

Section: Fig 1 Summary Of Reported Ice Adhesion Strength For An Ice/mentioning

confidence: 99%

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Characterization of Ice Adhesion: Approaches and Modes of Loading

Dawood

Yavas

Giuffre

et al. 2020

Aiaa Aviation 2020 Forum

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Airborne structures are vulnerable to atmospheric icing in cold weather operation conditions. Most of the ice adhesion-related works have focused on mechanical ice removal strategies because of practical considerations, while limited literature is available for a fundamental understanding of the ice adhesion process. Here, we present fracture mechanics-based approaches to characterize interfacial fracture parameters for the tensile and shear behavior of a typical ice/aluminum interface. An experimental framework employing single cantilever beam, direct shear, and push-out shear tests were developed to achieve near mode-I and near mode-II fracture conditions at the interface. Both analytical (beam bending and shear-lag analysis), and numerical (finite element analysis incorporating cohesive zone method) models were used to extract mode-I and II interfacial fracture parameters. The combined experimental and numerical results, as well as surveying published results for the direct shear and push-out shear tests, showed that mode-II interfacial strength and toughness could be significantly affected by the test method due to geometrically induced interfacial residual stress. As a result, the apparent toughness of the zeroangle push-out test could reach an order of magnitude higher than those derived from direct shear tests. Moreover, it was found that the interfacial ice adhesion is fracture mode insensitive and roughness insensitive for tensile and shear modes, for the observed modes of failures in this study Disciplines Disciplines Aeronautical Vehicles | Structures and Materials Comments Comments

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Section: Resultsmentioning

confidence: 99%

Section: Fig 1 Summary Of Reported Ice Adhesion Strength For An Ice/mentioning

confidence: 99%

Characterization of Ice Adhesion: Approaches and Modes of Loading

Dawood

Yavas

Giuffre

et al. 2020

Aiaa Aviation 2020 Forum

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“…Surfaces with ice adhesion strength below 10 kPa are often denoted as super-low, or ultra-low, ice adhesion surfaces (SLIAS) [6]. In the past years, examples of surfaces reaching below 1 kPa have also been reported [12][13][14]. However, the field of low ice adhesion materials research has been known to operate by continuum theory or a trial-and-error strategy, where the focus has been on developing new surfaces and coatings without fully understanding the underlying mechanisms [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Correlations of Ice Adhesion Strength and Water Contact Angle

Rønneberg

Xiao

et al. 2020

Coatings

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Surfaces with low ice adhesion represent a promising strategy to achieve passive anti-icing performance. However, as a successful and robust low ice adhesion surface must be tested under realistic conditions at low temperatures and for several types of ice, the initial screening of potential low ice adhesion surfaces requires large resources. A theoretical relation between ice adhesion and water wettability in the form of water contact angle exists, but there is disagreement on whether this relation holds for experiments. In this study, we utilised molecular dynamics simulations to examine the fundamental relations between ice adhesion and water contact angle on an ideal graphene surface. The results show a significant correlation according to the theoretic predictions, indicating that the theoretical relation holds for the ice and water when discarding surface material deformations and other experimental factors. The reproduction of the thermodynamic theory at the nanoscale is important due to the gap between experimental observations and theoretical models. The results in this study represent a step forward towards understanding the fundamental mechanisms of water–solid and ice–solid interactions, and the relationship between them.

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“…of surfaces that can facilitate crack generation through stiffness inhomogeneity and deformation incompatibility as well as achieve super-low ice adhesion strength without the use of any surface additives. 18,19 Such MACI surfaces can be combined with other mechanisms to further reduce ice adhesion. Notably, other new strategies for anti-icing have emerged, particularly those that involve ice growth and patterns into the design of surface icephobicity.…”

Section: New Conceptsmentioning

confidence: 99%

“…For the sake of mechanical robustness, PDMS with the same silicone base as that of silicon rubber was made for LLG 2, as it is one of the most common options for fabricating icephobic coatings. [17][18][19][40][41][42] In particular, silicon wafers with pillars were used as templates for molding PDMS; an example is shown in Fig. S8 (ESI †).…”

Section: Design Principles and Fabrication Of Icephobic Llgsmentioning

confidence: 99%