Flax and jute fabrics are adopted to reinforce epoxy matrix composites in order to explore the feasibility of replacing wood in percussion instruments.The fabrics are treated with alkaline solutions to improve interfa...Flax and jute fabrics are adopted to reinforce epoxy matrix composites in order to explore the feasibility of replacing wood in percussion instruments.The fabrics are treated with alkaline solutions to improve interfacial adhesion between fibers and epoxy.The composites are fabricated using the hand-lay and vacuum assisted resin infusion process.Acoustic dynamic moduli,acoustic radiation damping coefficients,and acoustic impedances of the composites are tested and compared with those of the wood regularly used to make the percussion instruments.It is found that the acoustic properties of the composites are within the range of those of the wood,indicating that it could be feasible to replace the wood with natural cellulose fiber reinforced composites in percussion instrument production.展开更多
Cuprammonium fabrics are susceptible to punctuation of the sewing needle during the manufacturing processes of a garment.This type of punctuation splits the yarns in the fabrics,creates ladder-like sewing defects,and ...Cuprammonium fabrics are susceptible to punctuation of the sewing needle during the manufacturing processes of a garment.This type of punctuation splits the yarns in the fabrics,creates ladder-like sewing defects,and seriously affects the aesthetics of the finished garment.To minimize this seam damage,a sandwiched structure of cuprammonium fabrics with a fusible interlining was proposed to enhance the friction between the yarns in the fabrics.A measurement system was set up to evaluate the seam damage,and the effects of stitch length and seam width on the seam damage were studied.The seam damage tended to become less severe as the stitch length increased.The addition of the fusible interlining between two pieces of the fabrics could effectively suppress the seam damage.The seam margin should be below or equal to 5 mm for the stitch length of 2.0 mm.An excessive seam margin might lead to a distorted seam.展开更多
基金National Natural Science Foundation of China(No.51803108)Natural Science Foundation of Fujian Province,China(Nos.2019J01740,2019J05106)+2 种基金Quanzhou City Science&Technology Program,China(Nos.2016Z071,2018K002,2018G011)Startup Foundation for Doctors of Quanzhou Normal University,China(No.H18028)Science and Technology Program of Quanzhou Normal University,China(No.2013KJ04)。
文摘Flax and jute fabrics are adopted to reinforce epoxy matrix composites in order to explore the feasibility of replacing wood in percussion instruments.The fabrics are treated with alkaline solutions to improve interfacial adhesion between fibers and epoxy.The composites are fabricated using the hand-lay and vacuum assisted resin infusion process.Acoustic dynamic moduli,acoustic radiation damping coefficients,and acoustic impedances of the composites are tested and compared with those of the wood regularly used to make the percussion instruments.It is found that the acoustic properties of the composites are within the range of those of the wood,indicating that it could be feasible to replace the wood with natural cellulose fiber reinforced composites in percussion instrument production.
基金Education and Scientific Research Foundation for Middle-Aged and Young Teachers of Fujian Province,China(No.JAT170498)。
文摘Cuprammonium fabrics are susceptible to punctuation of the sewing needle during the manufacturing processes of a garment.This type of punctuation splits the yarns in the fabrics,creates ladder-like sewing defects,and seriously affects the aesthetics of the finished garment.To minimize this seam damage,a sandwiched structure of cuprammonium fabrics with a fusible interlining was proposed to enhance the friction between the yarns in the fabrics.A measurement system was set up to evaluate the seam damage,and the effects of stitch length and seam width on the seam damage were studied.The seam damage tended to become less severe as the stitch length increased.The addition of the fusible interlining between two pieces of the fabrics could effectively suppress the seam damage.The seam margin should be below or equal to 5 mm for the stitch length of 2.0 mm.An excessive seam margin might lead to a distorted seam.
