Design and Analysis of Auxetic Structures in Bedsore Patient Mattresses for Uniform Weight Distribution

Design and Analysis of Auxetic Structures in Bedsore Patient Mattresses for Uniform Weight Distribution | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 12 June 2025 V1 Latest version Share on Design and Analysis of Auxetic Structures in Bedsore Patient Mattresses for Uniform Weight Distribution Authors : Hamed Shojaei Borjouei , Naser Kordani [email protected] , and Mohammad khodabandeh 0009-0001-6262-8093 Authors Info & Affiliations https://doi.org/10.22541/au.174970455.53938681/v1 220 views 124 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Currently, polymeric foams are widely utilized in the creation of passive support surfaces such as mattresses, cushions, and seating. However, these materials encounter challenges in prolonged use, including diminished performance, permanent deformation, reduction in thickness, and nonuniform pressure distribution. These issues can lead to pressure concentration in sensitive bodily areas, particularly the gluteal region, thereby increasing the risk of pressure ulcers. Advances in additive manufacturing technology, alongside the capability to design engineered structures with controllable mechanical properties, have directed researchers’ attention toward employing this method as an alternative to traditional foams. Among these, auxetic structures have garnered interest for applications related to skin wound healing due to their unique mechanical characteristics. In this study, re-entrant auxetic structure samples were numerically designed using the finite element method and subsequently fabricated via the fused deposition modeling (FDM[1](#fn-0002)) additive manufacturing process, utilizing thermoplastic polyurethane (TPU[2](#fn-0003)). The mechanical performance of these structures was assessed through compression testing, in accordance with ISO 3386-1, and fatigue testing. These analyses investigated the impact of parameters such as unit cell dimensions and cell angle on the compressive stress and resilience of the structure. The results indicated that the designed auxetic structure, when utilizing TPU with A95 hardness, could achieve a compressive stress between 7 and 8 kPa at 40% compression. Furthermore, fatigue tests demonstrated that the structure’s resilience is dependent on the amount of strain, whereas the loading duration did not significantly affect its rebound behavior. These findings underscore the high potential of auxetic structures in designing support surfaces with customizable mechanical performance, tailored to the biomechanical needs of the body. Supplementary Material File (last edit shojaie.docx) Download 5.58 MB Information & Authors Information Version history V1 Version 1 12 June 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords auxetic finite element simulation Authors Affiliations Hamed Shojaei Borjouei University of Mazandaran View all articles by this author Naser Kordani [email protected] University of Mazandaran View all articles by this author Mohammad khodabandeh 0009-0001-6262-8093 University of Mazandaran View all articles by this author Metrics & Citations Metrics Article Usage 220 views 124 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Hamed Shojaei Borjouei, Naser Kordani, Mohammad khodabandeh. Design and Analysis of Auxetic Structures in Bedsore Patient Mattresses for Uniform Weight Distribution. Authorea . 12 June 2025. DOI: https://doi.org/10.22541/au.174970455.53938681/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. 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