Analysis of open-hole-tension plates made of short fibre thermoplastic and reinforced with continuous fibre tailored inserts

Abstract

In the present paper, the influence of tailored load introduction inserts applied to a bolt-loaded open-hole injection plate with different short glass fibre content is investigated. The tailored load introduction inserts made with a Tailored Fibre Placement (TFP) process, as well as open-hole injection plates without an insert were considered as reference samples. The samples were tested under tensile bolt-loading. The influence of the TFP-inserts on the load bearing properties of the open-hole injection plates was investigated. The test results show a huge increase of the load-carrying ability of the short-glass-fibre specimens when TFP-inserts are integrated. Moreover, the damage tolerance was dramatically improved as the specimens with integrated TFP-inserts did not fail abruptly and a residual strength higher than the strength of the test specimen without insert could be observed. However, the strength of the test specimen with integrated insert did not exceed the strength of the insert itself in most cases.

Simulating performance of tow reinforced hybrid-molded composites

“…5,6 Researchers have investigated manufacturing of 3D space frame structures from continuous fiber thermoset composites, 7,8,9,10 as well as overmolded reinforcements made by winding heated commingled fibers 2,3 or thermoplastic UD tape collected into a bundle. 11 These and similar continuous fiber tow reinforcements have been shown to provide significant strength improvement over traditional molded components, especially in tension, 12,13,14 however prediction of the performance is limited.…”

Comparison between bearing strengths of molded-in and machined holes of GFR/PP composites

“…Injection molding can flexibly provide thermoplastic constructions reinforced with short fibers as an enhancement for strength including joint strength. However, there are limits to joint strength enhancement through increasing shot fiber content 52 . Despite reinforcing injection molded parts with continuous fibers is not possible, holes could be reinforced using embedded local continuous fibers 52 .…”

“…However, there are limits to joint strength enhancement through increasing shot fiber content 52 . Despite reinforcing injection molded parts with continuous fibers is not possible, holes could be reinforced using embedded local continuous fibers 52 . Moreover, an allowance of improving joint performance by metallic insert is possible through injection molding 53 , 54 , where direct adhesion between the plastic and the metal could be secured 55 .…”