Generalizability of Footwear Traction Performance across Flooring and Contaminant Conditions

Chanda, Arnab; Jones, Taylor G.; Beschorner, Kurt E.

doi:10.1080/24725838.2018.1517702

Cited by 34 publications

(42 citation statements)

References 31 publications

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“…It is worth noting that interaction effects including flooring were small and insignificant. Furthermore, other research has suggested that shoe traction performance across vinyl composite, quarry and ceramic floor surfaces are generalizable in the presence of canola oil (Chanda et al, 2018). Thus, these results are expected to be consistent when applied to other floorings.…”

Section: Discussionmentioning

confidence: 54%

Prediction of coefficient of friction based on footwear outsole features

et al. 2020

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Traction testing of footwear is expensive, which may create barriers for certain users to assess footwear. This study aimed to develop a statistical model that predicts available coefficient of friction (ACOF) under boundary lubrication conditions based on inexpensive measurements of footwear outsole features. Geometric and material hardness parameters were measured from fiftyeight footwear designs labeled as slip-resistant. A robotic friction measurement device was used to quantify ACOF with canola oil as the contaminant. Stepwise regression methods were used to develop models based on the outsole parameters and floor type to predict ACOF. The predictive ability of the regression models was tested using the k-fold cross-validation method. Results indicated that 87% of ACOF variation was explained by three shoe outsole parameters (tread surface area, heel shape, hardness) and floor type. This approach may provide an assessment tool for safety practitioners to assess footwear traction and improve workers' safety.

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Section: Discussionmentioning

confidence: 54%

Prediction of coefficient of friction based on footwear outsole features

et al. 2020

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“…The human slip biomechanics based on the parameters used to develop the slip tester were in-line with previous literature studies [17,22,32]. The maximum normal foot load of an average human [13], the slipping velocity observed in human slipping studies [17,33], and the ability to simulate different heel contact angles during slipping were incorporated into the device specifications. The outcomes of the device were validated using 10 formal shoes, tested across two different floorings in dry and wet conditions.…”

Section: Introductionmentioning

confidence: 70%

“…To reduce the overall slip risk, adequate shoe-floor traction is required [7][8][9][10][11]. Furthermore, external factors, such as fluid contaminated floorings, are known to increase the risk of slipping [10,12,13]. The resisting force required to ambulate across different flooring surfaces in barefoot conditions or when wearing shoes is typically quantified by the ratio of shear force to normal force, known as the available coefficient of friction (ACOF) [10,12,14,15].…”

Section: Introductionmentioning

confidence: 99%

“…The resisting force required to ambulate across different flooring surfaces in barefoot conditions or when wearing shoes is typically quantified by the ratio of shear force to normal force, known as the available coefficient of friction (ACOF) [10,12,14,15]. Several factors have been reported to alter the ACOF, such as presence of contaminants [16], type of flooring, footwear material, and outsole tread geometry [7,10,11,13,[17][18][19]. Thus, to reduce the risk of slip accidents, the quantification of these variables is imperative.…”

Section: Introductionmentioning

confidence: 99%

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Development of a Portable Device for Surface Traction Characterization at the Shoe–Floor Interface

et al. 2022

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Slip and fall accidents are widespread in workplaces and on walkways. Slipping is generally initiated by a sudden change in the flooring properties or due to a low available traction at the shoe–floor interface. To measure shoe-floor traction, mechanical slip and fall risk estimation devices are typically employed. However, to date, such existing devices are lab-based, bulky, and are unable to simulate realistic slip biomechanics and measure whole footwear traction in realistic contaminated floorings at the same time. Moreover, these devices are expensive and not available in low- or lower-middle-income countries with limited awareness regarding slip testing. To overcome these challenges, in this work, a biofidelic, portable, and low-cost slip testing device was developed. A strategic three-part subassembly was designed for the application of normal load, slipping speed, and heel strike angle for its modularity. The developed slip tester was extensively tested and validated for its performance using 10 formal footwears and two floorings, under dry and wet conditions. The results indicated that the slip tester was accurate, repeatable, and reliable in differentiating traction measurements across varying combinations of shoes, contaminants, and floorings. The instrumentation performance of the slip tester was found to also capture the differences between different shoe tread patterns in the presence of fluid films. The developed device is anticipated to significantly impact the clinical, industrial, and commercial performance testing of footwear traction in realistic slippery flooring conditions, especially in the low- or middle-income countries.

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“…To date, a plethora of surrogate models exist for soft tissues such as the calcaneal heel pad [19,20], which have been characterized using indentation systems (measuring external load–deformation responses) [20], imaging (for internal strain measurements) [21], and experienced palpatory testing [22]. These surrogates have been used in anthropomorphic test devices for the study of injury risks associated with the lower extremity due to blast loading [14,19,23,24] and high impact loadings sustained in vehicular crashes [25,26]. Also, surrogate models have been employed in several studies to characterize the effect of personal protection equipment [27], and orthotic interventions for injury prevention [28,29].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Modeling of Healthy and Diseased Calcaneal Fat Pad Surrogates

Chanda

McClain

2019

Biomimetics

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The calcaneal fat pad is a major load bearing component of the human foot due to daily gait activities such as standing, walking, and running. Heel and arch pain pathologies such as plantar fasciitis, which over one third of the world population suffers from, is a consequent effect of calcaneal fat pad damage. Also, fat pad stiffening and ulceration has been observed due to diabetes mellitus. To date, the biomechanics of fat pad damage is poorly understood due to the unavailability of live human models (because of ethical and biosafety issues) or biofidelic surrogates for testing. This also precludes the study of the effectiveness of preventive custom orthotics for foot pain pathologies caused due to fat pad damage. The current work addresses this key gap in the literature with the development of novel biofidelic surrogates， which simulate the in vivo and in vitro compressive mechanical properties of a healthy calcaneal fat pad. Also, surrogates were developed to simulate the in vivo mechanical behavior of the fat pad due to plantar fasciitis and diabetes. A four-part elastomeric material system was used to fabricate the surrogates, and their mechanical properties were characterized using dynamic and cyclic load testing. Different strain (or displacement) rates were tested to understand surrogate behavior due to high impact loads. These surrogates can be integrated with a prosthetic foot model and mechanically tested to characterize the shock absorption in different simulated gait activities, and due to varying fat pad material property in foot pain pathologies (i.e., plantar fasciitis, diabetes, and injury). Additionally, such a foot surrogate model, fitted with a custom orthotic and footwear, can be used for the experimental testing of shock absorption characteristics of preventive orthoses.

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Generalizability of Footwear Traction Performance across Flooring and Contaminant Conditions

Cited by 34 publications

References 31 publications

Prediction of coefficient of friction based on footwear outsole features

Prediction of coefficient of friction based on footwear outsole features

Development of a Portable Device for Surface Traction Characterization at the Shoe–Floor Interface

Mechanical Modeling of Healthy and Diseased Calcaneal Fat Pad Surrogates

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