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Reclined Seating Postures on Passive Safety Performance in Automotive Seats

dc.contributor.authorCarmo, Nuno
dc.contributor.authorMilho, João
dc.contributor.authorCarvalho, Marta
dc.contributor.institutionDEMI - Departamento de Engenharia Mecânica e Industrial
dc.contributor.institutionUNIDEMI - Unidade de Investigação e Desenvolvimento em Engenharia Mecânica e Industrial
dc.contributor.institutionFaculdade de Ciências e Tecnologia (FCT)
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2026-06-23T12:58:02Z
dc.date.available2026-06-23T12:58:02Z
dc.date.issued2026-04
dc.descriptionPublisher Copyright: © 2026 by the authors. Licensee MDPI, Basel, Switzerland.
dc.description.abstractThe increasing adoption of reclined seating postures in modern vehicle interiors challenges the assumptions underpinning current passive safety systems and occupant protection assessment frameworks. While restraint technologies and certification protocols have historically been developed for upright configurations, emerging trends in autonomous driving and comfort-oriented designs promote relaxed postures that fundamentally alter occupant kinematics, loading path, and consequently the injury mechanisms. This review critically synthesizes experimental and numerical studies addressing occupant biomechanics, restraint system performance, and injury risk in reclined seating. Evidence from crash tests using Anthropomorphic Test Devices and Post-Mortem Human Surrogates, alongside high-fidelity numerical Human Body Models, is analyzed to identify consistent trends and methodological limitations. The results highlight increased forward excursion, elevated submarining propensity, and posture-dependent abdominal and lumbar loading as critical consequences of increased seatback recline. Furthermore, this review discusses the effectiveness of adaptive restraint strategies, including active repositioning and modified airbag–belt integration. By identifying existing research gaps and regulatory limitations, this work aims to provide a roadmap for the development of future safety systems that ensure robust protection for all occupants in the era of automated mobility.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent762923
dc.identifier.doi10.3390/machines14040402
dc.identifier.issn2075-1702
dc.identifier.otherPURE: 163172361
dc.identifier.otherPURE UUID: 658f4905-670a-44d5-b73e-634c3b6d58b8
dc.identifier.otherScopus: 105037217628
dc.identifier.otherWOS: 001750017700001
dc.identifier.urihttp://hdl.handle.net/10362/204041
dc.identifier.urlhttps://www.scopus.com/pages/publications/105037217628
dc.language.isoeng
dc.peerreviewedyes
dc.subjectadaptive restraint systems
dc.subjectAnthropomorphic test devices (ATDs)
dc.subjectautonomous vehicles
dc.subjecthuman body models (HBMs)
dc.subjectoccupant biomechanics
dc.subjectpassive safety
dc.subjectreclined seating posture
dc.subjectsubmarining
dc.subjectControl and Systems Engineering
dc.subjectComputer Science (miscellaneous)
dc.subjectMechanical Engineering
dc.subjectControl and Optimization
dc.subjectIndustrial and Manufacturing Engineering
dc.subjectElectrical and Electronic Engineering
dc.titleReclined Seating Postures on Passive Safety Performance in Automotive Seatsen
dc.title.subtitleA Reviewen
dc.typereview
degois.publication.issue4
degois.publication.titleMachines
degois.publication.volume14
dspace.entity.typePublication
rcaap.rightsopenAccess

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