Chen, Xiaogang

Yuan, Zishun

English

The University of Manchester - Institutional Repository

The University of Manchester ResearchA numerical study on Quasi-isotropic (QI) Panels Madefrom Dyneema® Woven Fabrics at Ballistic ImpactLink to publication record in Manchester Research ExplorerCitation for published version (APA):Yuan, Z., & Chen, X. (2018). A numerical study on Quasi-isotropic (QI) Panels Made from Dyneema® WovenFabrics at Ballistic Impact.Citing this paperPlease note that where the full-text provided on Manchester Research Explorer is the Author Accepted Manuscriptor Proof version this may differ from the final Published version. If citing, it is advised that you check and use thepublisher's definitive version.General rightsCopyright and moral rights for the publications made accessible in the Research Explorer are retained by theauthors and/or other copyright owners and it is a condition of accessing publications that users recognise andabide by the legal requirements associated with these rights.Takedown policyIf you believe that this document breaches copyright please refer to the University of Manchester’s TakedownProcedures [http://man.ac.uk/04Y6Bo] or contact uml.scholarlycommunications@manchester.ac.uk providingrelevant details, so we can investigate your claim.Download date:09. Jun. 2022A numerical study on Quasi-isotropic(QI) Panels Made from Dyneema® Woven Fabrics at Ballistic Impact Dr Zishun Yuan, Dr Xiaogang Chen School of Materials (University of Manchester, United Kingdom, M13 9PL) ? A multilayer QI fabric panel made up of N layers requires the layer to be oriented at 90°/N between each other owing to the biaxial structure of woven fabrics, where N is larger than 1.  ?? Aligned panel Background and Introduction Compared with aligned panels, QI panels take more advantages of the secondary yarns in terms of deformation and stress distribution by means of actions of primary yarns in the ply on the secondary yarns in the followed plies. Conclusion References Contact Details: zishun.yuan@postgrad.manchester.ac.uk Kaw A K. Mechanics of composite materials [M]. CRC press, 2010. Methodology Discussion and Conclusion  What is a QI panel made from woven fabrics?  Why are the QI fabric panels used for ballistic protection?  More secondary yarns are involved in transverse deformation to absorb more energy in comparison with the aligned panel. QI panel Aim and Objectives Objectives:  (1)  Numerically analyse the influence of QI structure on the transverse deformation; (2) Numerically analyse the influence of QI structure        on the stress distribution; Identify the mechanisms of aligned and QI panels made from Dyneema® woven fabrics at ballistic impact Aim Results and Analysis 1.Energy absorption The back ply in aligned panels 2-ply panels 3-ply panels 4-ply panels 2. Deformation areas The increase of the energy absorption of the QI panels is principally owing to the increase of KE and IE of secondary yarns in the middle and back plies. The deformation areas of the plies in the middle and the back in the QI panels are larger than the counterparts in the aligned panels. Ply-2 of 2-ply aligned panel 3-ply panels 4-ply panels Ply-2 of 2-ply QI panel The stress in QI panels tends to distribute to secondary yarns while the stress in aligned panels tends to propagate along the thickness direction thereby giving rise to stress concentration in the back. Panels  in use: 2-ply aligned and QI panels: [0/0],  [0/45]; 3-ply aligned and QI panels:  [0/0/0], [0/30/60]; 4-ply aligned and QI panels:  [0/0/0/0], [0/22.5/45/67.5]; Discussion The compression of the primary yarns in the ply-1 causes the stresses propagating to the secondary yarns in the ply-2. The back ply in QI panels Wang Y, Chen X, Young R, Kinloch I and Garry W. A numerical study of ply orientation on ballistic impact resistance of multi-ply fabric panels. Composites Part B: Engineering, 2015. 68: p. 259-265. 3. Stress distribution Constructions of multi-ply fabric panel 

A numerical study on Quasi-isotropic (QI) Panels Made from Dyneema® Woven Fabrics at Ballistic Impact

https://pure.manchester.ac.uk/ws/files/67650753/Zishun_Yuan_Poster.pdf

A numerical study on Quasi-isotropic (QI) Panels Made from Dyneema® Woven Fabrics at Ballistic Impact

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