Experimental analysis of transverse impact loading on composite cylinders

Defect and damage detection in filament wound carbon composite cylinders: A new numerical-experimental methodology based on vibrational analyses

“…First, the design variables space is defined and the levels of variability on each of the design variables are quantified. They are related to the geometry of the laminated composite cylinders, which are evaluated (Step 1), and they are related to the material properties, which are obtained from previous studies [20][21][22][23][24] (Step 2). The design variables range is an important input for the DoE procedure.…”

“…In the context of manufacturing defects, deviations probably exhibit a different profile, with less pronounced deviations on a local scale but the other hand with a larger region that is affected by 3.54mm, respectively (Table 1) [24]. According to Ribeiro et al [24], for all types of cylinders, the value of thickness has been calculated based on the average of all nominally identical specimens.…”

“…The proposed methodology uses the variation of the design parameters, which affect the FRFs, determining the Damage Indices (DI) to quantify the influence of the manufacturing process on the final quality of the structure. The variations are based on the manufacturing process of real laminate composite cylinders, as well as previous works [20][21][22][23][24]. After a careful investigation of composite reinforcement topologies and their application in tubular members, three sets of composite cylinders are kindly made available by the Brazilian Navy Technological Centre, and considering the manufacturing process limits: [(90/60/-60)2/90]s, [(90/30/-30)2/90]s and [90/30/-60/60/-60/30/-30]s. Several experiments are conducted to obtain the full range of variation, evaluating factors based on the numerical results, and DoE strategy.…”

Impact Resistance of Fibre Reinforced Composite Railway Freight Tank Wagons

“…With regards to a freight tank wagon vessel, a range of numerical and experimental studies have been conducted to analyse the low-velocity impact resistance of a CFRP filament-wound pressure vessel. These include analysis of the impact response [39][40][41][42], damage prediction [43,44] and residual burst strength after impact [45][46][47][48]. Moreover, the effect of pressure-induced hoop and axial preload has also been studied [49,50].…”

A Study on Explosion Separation Technology of Carbon Fiber Reinforced Epoxy Resin-Based Composite Laminate

“…Compared with commonly used materials, such as metals and alloys, fiber composite materials have excellent properties, such as a light weight, high specific strength, high modulus, and high rigidity. Therefore, they have been used extensively in many fields, especially in aerospace [1][2][3]. The use of composite material has improved aircraft aeroelasticity and structural weight has been reduced, which has promoted aircraft structure modularization and lightweightedness.…”