Computational model of shoe wear progression: Comparison with experimental results

Moghaddam, Seyed Reza M.; Hemler, Sarah L.; Redfern, Mark S.; Jacobs, Tevis D. B.; Beschorner, Kurt E.

doi:10.1016/j.wear.2019.01.070

Cited by 16 publications

(8 citation statements)

References 43 publications

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“…The slip testing outcomes across the shoes tested on different floorings exhibited high differences in the ACOF. The differences in the ACOF across the floorings could be due to contributing factors based on surface roughness (i.e., hysteresis friction) [17,36]. When validating the ability of the slip tester to differentiate between the shoes when tested across dry and wet flooring conditions, high differences in the ACOF were again observed.…”

Section: Discussionmentioning

confidence: 98%

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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Section: Discussionmentioning

confidence: 98%

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

et al. 2022

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“…Primarily, the parametrically modified 3D models of the outsoles were bent by 17 • and up to 50 mm measured from the posterior point of the heel. The considered angle and length metric has previously been reported to be adequate in determining the traction performance during unintentional slips [16,26]. Furthermore, the outsoles were applied with a normal load of 250 N, which has been reported to be the force applied by humans during unintentional slips [8,16,27,28].…”

Section: O1mentioning

confidence: 99%

Influence of Vertically Treaded Outsoles on Interfacial Fluid Pressure, Mass Flow Rate, and Shoe–Floor Traction during Slips

Gupta

Chatterjee

Chanda

2023

Fluids

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Accidental injuries due to slips and falls are considered serious threats to public safety. Sufficient friction at the footwear and flooring interface is essential to reduce slip-related risks. The presence of slippery fluidic contaminants, such as water, further reduces friction and increases the risks of slip-related accidents drastically. While the effect of floorings and contaminants on footwear traction has been measured extensively across a variety of footwear designs, only a few studies have explored the science of the outsole design and its role in providing sufficient traction. In this work, the tread design of a commonly encountered outsole pattern, i.e., with vertically oriented tread channels, was parametrically altered across its width and gap. Based on the impressions of an original footwear design, nine outsoles were fabricated. The induced fluid pressures, mass flow rates, and traction were quantified by using a computational fluid dynamics (CFD) framework and through slip testing experiments. Outsoles that had wide treads with small gaps decreased the overall slipping risk on dry floorings. As compared to the tread area, tread gaps were found to be a dominating parameter in providing adequate shoe–floor traction in wet slipping conditions. The methods, including the outcomes presented in this work, are anticipated to advance the understanding of the science behind footwear friction and help footwear manufacturers optimize outsole designs to reduce slip and fall risks.

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“…There is also no published data on how safety footwear is supplied to workers and protocols for when it is replaced in the wine industry. Recent research into shoe tread (sole) wear and wear measurement has highlighted the need for understanding the mechanism for shoe tread wear and individualised shoe replacement recommendations to prevent injury caused by the decline in traction of worn shoes [47][48][49].…”

Section: Discussionmentioning

confidence: 99%

Identifying lower limb problems and the types of safety footwear worn in the Australian wine industry: a cross‐sectional survey

Copper

Scharfbillig

Nguyen

et al. 2021

Journal of Foot and Ankle Research

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Background The Australian wine industry is a valuable part of the wider Australian economy worth approximately A$45 billion annually and employs 163,790 people either full time or part time. Australian agricultural industries are amongst the nation’s most dangerous workplaces with joint, ligament, muscle and tendon injuries being commonplace along with wounds, lacerations and musculoskeletal diseases. It is therefore important to try and minimise the risk of injuries to workers. The aims of this study were to (1) identify whether lower limb problems occur in the Australian wine industry and (2) identify the types of safety footwear worn. Methods Participants were recruited from the Australian wine industry. The study was a cross-sectional anonymous survey of 82 questions with n = 207 respondents. Questions related to job role performed, types of lower limb problems experienced, level of pain, restriction of activities, types of footwear worn, general health and physical health. Results The main working roles were winery (73.4%), vineyard (52.2%), laboratory (39.6%), cellar door (32.4%) and office (8.2%), with 63.3% of participants working in more than one role. Lower back pain was the most commonly reported problem at 56% followed by foot pain (36.7%), knee pain (24.6%), leg pain (21.3%), ankle pain (17.9%), hip pain (15.5%), toe pain (13%) and heel pain (11.1%). The most popular footwear used by participants were elastic sided safety boots, followed by high cut lace up safety boots with side zip. Overall, although the pain experienced was moderate, it did not impact the workers ability to perform their duties and the majority self-reported as being in very good general and physical health. Conclusion To date no data have been published on the types of lower limb problems or the types of safety footwear worn in the Australian wine industry. This study is the first to demonstrate that elastic sided safety boots were the most popular amongst respondents and that lower limb problems occur with workers. Therefore, further research into the safety footwear used in the Australian wine industry is needed to better support workers health while working in their varied roles and conditions.

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Computational model of shoe wear progression: Comparison with experimental results

Cited by 16 publications

References 43 publications

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

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

Influence of Vertically Treaded Outsoles on Interfacial Fluid Pressure, Mass Flow Rate, and Shoe–Floor Traction during Slips

Identifying lower limb problems and the types of safety footwear worn in the Australian wine industry: a cross‐sectional survey

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