Finite Element Analysis of Warp-Knitted Mesh Spacer Fabric

摘要：

　　Three-dimensional mesh fabric is a special type of knitted spacer fabric with sandwich structure consisting of two separate meshed multifilament outer layers linked together with a layer of spacer monofilaments.It has found wide applications in home textiles and automotive industry due to its good energy-absorbing performance and ventilation property.The compres-sion behavior of meshed spacer fabric is highly nonlinear due to the highly inhomogeneous structure.This paper presents a fi-nite element analysis of a typical meshed spacer fabric utilizing the true geometries of spacer monofilaments reconstructed from X-ray tomography scanning in order to identify the compression mechanism.The fabric studied was knitted on a double needle bar warp knitting machine equipped with 5 guide bars of which four guide bars threading 600D/192F polyester multi-filaments were used to knit the two meshed outer layers and the other one in the center threading 0.22 mm diameter polyester monofilament was used to connect the two outer layers forming spacer layer.A finite element(FE)unit cell was composed of two outer layers meshed by SHELL181 and forty spacer monofilaments meshed by BEAM181.The internal multipoint con-straint(MPC)approach was used to connect the beams to the shells.Three additional contact pairs were created,for in-stance,among spacer monofilaments,between the outer layers and the compression plates,and between spacer monofila-ments and compression plates.The nonlinear properties of the polyester monofilament were used for the beam elements.Young's modulus of 3 586 MPa and Poisson's ratio of 0.3 were defined for the shell elements.Finally,the compression load-displacement curve calculated from the FE model agrees well with the experimental result.Some spacer monofilaments not on-ly twisted during the compression process,but also rotated.

关键词： Warp-knitted mesh spacer fabric Finite element analysis Compression mechanism

作者: XU Jing LIU Yanping

作者单位: Key Laboratory of Textile Science&Technology,Ministry of Education,Donghua University,Shanghai 201620,China;Department of Technical Textiles,College of Textiles,Donghua University,Shanghai 201620,China

会议类型: 国际会议

会议名称: 2021 Sino-Africa International Symposium on Textiles and Apparel (SAISTA2021)(2021中非纺织服装国际论坛)

会议地点: 线上

会议语种:英文

页码: 187-191

在线出版日期: 2021-11-05（万方平台首次上网日期，不代表论文的发表时间）