ON THE MECHANICS OF TWIST INSERTION by ALY H. M. EL-SHIEKH Submitted to the Department of Mechanical Engineering Fibers and Polymers Division, on May 14, 1965 in Partial Fulfillment of the Requirements for the Degree of Doctor of Science in Mechanical Engineering This investigation is directed toward an improved understanding of the mechanisms and actions taking place in the textile twisting pr...

Friction is one of the key factors in manufacture ropes, and has an important influence on mechanical behavior many fiber assemblies. For this reason, understanding evaluation coefficients friction between fibers essential step development numerical rope models. This paper describes tests a modified, upscaled version ASTM (American Society for Testing Materials) standard yarn-on-yarn abrasion t...

Commonly used in telecommunication, automotive and biomedical applications, microelectromechanical systems have limited successful commercial applications in other industries. This report briefly reviews MEMS, with a focus on sensors, and their limitations in the textile environment, as well as, outlines four potential projects for MEMS applications in textiles. One application was selected; mo...

The mode I interlaminar fracture toughness of stitched and unstitched composite laminates of continuous UD flax fiber and epoxy matrix was experimentally and numerically investigated. A twistless flax fiber yarn was used for stitching purpose. The mode I interlaminar energy release rate of the unstitched and stitched laminates was experimentally determined through Double Cantilever Beam (DCB) t...

The stress distributions of filament in bent yarn have never been seen experimentally.So the stress distributions in the cross section and the longitudinal direction of bent undrawn Tetron filaments are studied photoelastically in this paper.As the results,it is known that when the curvature is small,the compressible stress is equal to the tensile stress and when it is large, the compressible o...

The main goal of using dual core spun yarn is to take advantage all properties its different components. Dual-core yarns comprising three components are currently in vogue. They combine the pleasant wear elastic with high dimensional stability. production these a challenging process even at spinning stage, but they making demands market. Such stretchable produced modified Ring frame. In this sy...

Abstract A new computer geometric modeling approach for 2 × 1 and 3 twill woven fabric structures is proposed. The precise geometrical description presented by taking the skewness property into account. In weaves, fabrics are formed of asymmetric floatings in which length floating sections was not equal on both surfaces therefore equilibrium condition different from symmetric floatings. propose...

The problem of yarn breakage during spinning is quite serious, but it is difficult to predict the number of yarn breakages, because the tension and strength of the yarn always vary. The author has used simple mathematical models of the variation of the tension and the strength of the yarn, and calculated the probability of yarn breakages. The result has shown that the variation of the yarn stre...

Yarn hairiness is one of the key parameters influencing the quality of yarn.It is observed that yarn quality has been deduced based on yarn length and diameter only. But these parameters do not provide much information about yarn quality. Thus it is proposed to derive more yarn quality parameters like yarn hairiness, uniformity of yarn and its thickness. In textile industry, image processing is...