Sensitivity analysis of important parameters affecting contact pressure between a respirator and a headform

Dai, Jichang; Yang, James; Zhuang, Ziqing

doi:10.1016/j.ergon.2011.01.007

Cited by 31 publications

(15 citation statements)

References 21 publications

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“…Hence, the contact and the distribution of force can alter the pressure distribution, gait characteristics and perceived feel. For example, high contact pressures are related to discomfort (Dai et al 2011, Godfrey et al 1967, Hodge et al 1999) and have been mitigated primarily through the use of materials, contoured insoles, and outsole design (Fuller et al 2001, Brown et al 2004, Long et al 2007). The center of pressure (COP) determines a person's sense of balance and it also plays a crucial role when determining the function and form of a shoe.…”

Section: Introductionmentioning

confidence: 97%

Getting to the bottom of footwear customization

Weerasinghe

Goonetilleke

2011

J. Syst. Sci. Syst. Eng.

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Footwear have been evaluated mostly using commercially available products, while some researchers have used custom shoes. Hence, the understanding of the effects of various parameters of a shoe is quite limited. The footbed simulator invented in recent years allows a range of parameters to be studied in quiet standing. It can be used to evaluate perceived feel and center of pressure changes to changes in heel height, seat length, material, wedge angle and toe spring. This paper is meant to show the value of the footbed simulator in terms of research and the actual production of shoes. A study performed with two heel heights, three combinations of seat length and material and three wedge angles showed that the perceived feel is closely related to the center of pressure. The results also show the optimum footbed has a significantly different perceived feel. Thus, the footbed simulator is an ideal way to generate custom footwear designs.

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Section: Introductionmentioning

confidence: 97%

Getting to the bottom of footwear customization

Weerasinghe

Goonetilleke

2011

J. Syst. Sci. Syst. Eng.

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“…In their follow-up study, the finite element (FE) analysis technique was applied to estimate the contact pressure between the faces and the pilot oxygen mask in order to derive an optimal shape of the oxygen mask that shows a better fit to Korean pilots compared to the previous design [3]. The FE-based facial contact pressure analysis has been introduced by previous studies [4][5][6]. While the previous studies used only a few head models (say, less than five) for the pressure estimation of a mask product, this study had been tried to use hundreds and thousands of heads to calculate the contact pressure characteristics of a population that includes people showing different sizes and shapes of the head.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Facial Contact Pressure Based on Finite Element Analysis

Lee

Kim

Molenbroek

et al. 2019

Advances in Intelligent Systems and Computing

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A 3D head and face scan data can be usefully applied in the ergonomic design of a wearable product such as an oxygen mask or a virtual reality (VR) headset to support the safety as well as comfort for a certain amount of a target population. This study is aimed to develop analysis and design methods of an ergonomic facial wearable products (e.g., pilot oxygen mask, VR headsets) based on numerous 3D face scan data (366 faces and 2,299 heads) through the template registration and the finite element (FE) analysis methods to predict the contact pressure between the face and a product. The application of the FE analysis on numerous 3D images to find an optimal form of a product is a novel approach in product design. The proposed methods on contact pressure analysis could be usefully applied for wearable products, which fit body parts.

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“…Previous research on a mask design used representative face models; however, those masks didn't consider the facial characteristics analyzed to a significant amount of a target population in their research. Yatapanage and Post [6], Gross et al [2], Han and Choi [7], Han et al [8], and Song and Yang [9] proposed mask design methods based on an average face size or 1 ~ 3 of representative face models. However, the previous study didn't explain details of the mask design method based on the 3D facial data.…”

Section: Introductionmentioning

confidence: 99%

Ergonomic Design and Evaluation of a Pilot Oxygen Mask for Korea Air Force Pilots

Lee¹,

Jung²,

Park³

et al. 2014

Proceedings of the 5th International Conference on 3D Body Scanning Technologies, Lugano, Switzerland, 21-22 October 2014

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The present study developed a virtual fit analysis (VFA) method to design an oxygen mask which fits Korean Air Force (KAF) pilots. The VFA method used 3D face scan data of 336 KAF pilots to find the most proper shape of an oxygen mask for KAF pilots. The oxygen mask design revised in the study showed a 27% design improvement effect on average in terms of fit evaluated by the VFA method. Additionally, this study evaluated the revised oxygen mask prototypes with 88 KAF pilots to experimentally verify the design improvement effect in terms of discomfort, pressure, and suitability for military equipment (slippage and stability in flight-like situations). The discomfort of the revised mask was 33 ~ 56% lower on average than the existing oxygen mask. In terms of the pressure, the revised mask showed 11 ~ 33% of improvement on average compared to the existing mask. Furthermore, on high gravity situation, the slippage distance of the revised mask was 24% shorter on average than the existing mask. The proposed VFA method can be applied to the design and evaluation of wearable products that require an ergonomically better fit for a target population.

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Sensitivity analysis of important parameters affecting contact pressure between a respirator and a headform

Cited by 31 publications

References 21 publications

Getting to the bottom of footwear customization

Getting to the bottom of footwear customization

Estimation of Facial Contact Pressure Based on Finite Element Analysis

Ergonomic Design and Evaluation of a Pilot Oxygen Mask for Korea Air Force Pilots

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