Investigation of Circular Woven Composite Preforms for Composite Pipes

Abstract

The main traditional technique for commercial manufacturing of composite pipes is filament winding in which the winding angle and the discontinuity of the structure (caused by starting and ending points of the winding process) are two important matters of concern. In the present study, circular woven fabric with its orthogonal net-shaped continuous structure was produced from polyester yarns. Fabric was wet with epoxy and hand lay-up was used to manufacture the composite pipes. Composite pipes were subjected to internal hydrostatic pressure and their burst strength was recorded. In addition, tensile strength of flat laminas was assessed in the warp and weft directions. We estimated and analysed the failure strength of composite pipes using Tresca’s failure criterion and Finite Element (FE) modeling. The experimental burst strength was almost 23% more than the FE model and 77% more than the theoretical estimate.

Perbandingan kekuatan kompresi struktur laminasi dan prepreg dari komposit jute-epoxy

“…Berkaitan dengan pemanfaatan komposit sebagai bahan pembentuk dari pipa diteliti oleh Ngafwan, dkk [15] menjelaskan bahwa temperatur berpengaruh terhadap kekuatan tarik dari pipa komposit dengan serat alami (batang pisang). Selain itu, pengamatan terhadap komposit dengan anyaman sebagai pembentuk dari pipa komposit diamati oleh Amid, dkk [16]. Hasil dari kajian dinyatakan bahwa posisi tegak lurus dari benang weft mempengaruhi tegangan lingkaran.…”

Development of Actuator Networks by Means of Diagonal Arrangements of Shape Memory Alloys in Adaptive Fiber-Reinforced Plastics

“…Particularly in the last 20 years, fiber-reinforced plastics (FRP) have been used extensively as promising materials for resource-saving mobility. Due to their high stiffness at low mass compared to traditionally used materials, FRP are applied as load-bearing structures for the most dominant modes of transport, such as aviation, road, rail, or ship transport [1]. However, FRP can be used more efficiently and economically by integrating actuator materials for the realization of form variable structures.…”

An experimental study of the mechanical properties of seamless and overlapped stitched composite tubes under hydrostatic pressure, lateral compression, and impact

“…They observed that reorientation of the fiber tow by approximately 9.6% improves the stability and ductility of the seamless tubes. Amid et al 26 conducted hydrostatic burst testing on seamless fabric tubes and showed that increased burst strength is primarily attributed to the fabric architecture and alignment of fibers in the hoop direction. The burst pressure is the ultimate strength, and it is higher than the functional failure and first-ply-failure pressures.…”

“…Seamless preforms have been recently introduced to address the failure mechanism of seam formation in FW and stitched laminated tubes. 17,22–26 Hamada et al 22 showed that braided composite thick-walled tubes experience less delamination than laminated tubes. In their lateral compression tests, delamination propagation in multi-reciprocal tubes was shown to be impeded by through-thickness fiber bundles.…”