Experimental investigation on dynamic failure of carbon/epoxy laminates under underwater impulsive loading

Ren, Peng; Zhou, Jiaqi; Tian, Anli; Ye, Renchuan; Shi, Lu; Zhang, Wei; Huang, Wei

doi:10.1016/j.marstruc.2018.02.004

Cited by 19 publications

(10 citation statements)

References 31 publications

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“…Composite materials are extensively used in structural applications ranging from aerospace [1,2], marine [3,4], and automotive [5,6] applications due to their low weight and high mechanical properties. Among the various composite manufacturing techniques, wet lay-up (aka hand lay-up) vacuum bagging is a relatively low-cost, flexible method that does not require special tooling [7,8].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High Quality, Large Wet Lay-Up/Vacuum Bag Laminates by Sliding a Magnetic Tool

et al. 2018

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This study presents a novel method to fabricate high-quality, large composite parts which can be used in a wet lay-up/vacuum bag (WLVB) process. The new method utilizes a commercial lifting magnet, which is commonly used for transporting ferrous plates, to apply a magnetic consolidation pressure on the WLVB composite lay-up. The pressure is applied on a large area of the laminate by slowly sliding the magnet over the vacuum bag surface, which leads to an improved laminate quality. When further improvement is desirable, multiple passes of the magnet can be performed, where each pass successively compacts the lay-up. To explore the feasibility of implementing this technique, random mat and plain weave glass/epoxy laminates were fabricated, and their properties compared to conventional WLVB laminates. The effects of the number of moving passes of the lifting magnet on the laminate microstructure and properties are also investigated. As a result of multiple passes, the fiber volume fraction in random mat and plain weave laminates increases to 34% and 53%, representing 80% and 16% improvements, respectively. In addition, the void volume fraction reduces almost by 60% to a very low level of 0.7% and 1.1%, respectively. Consequently, the flexural properties considerably enhance by 20–81%, which demonstrates the potential of the proposed method to produce WLVB parts with substantially higher quality. It is also shown that there exists an optimal number of passes, depending on the fabric type where additional passes induce new voids as a result of excessive resin removal.

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Section: Introductionmentioning

confidence: 99%

Fabrication of High Quality, Large Wet Lay-Up/Vacuum Bag Laminates by Sliding a Magnetic Tool

et al. 2018

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“…The fixture with rubber packing can avoid the stress concentration at the boundary of the target plates. The side length of square target plates used in the tests is 120 mm enough to reproduce the damage states [18,19]. The steel fixture can guarantee the projectile impact on the center of the target plates.…”

Section: Methodsmentioning

confidence: 99%

“…Then, Ren et al. [18] and Xie et al. [19] concluded three typical failure modes of fiber laminates subjected to impulse loads, including fibers breakage, delamination, and matrix crack.…”

Section: Introductionmentioning

confidence: 99%

Dynamic failure of carbon fiber-reinforced plastics sandwich structures with polyvinyl chloride foam cores subjected to impact loading

Ren

Liu

Tao

et al. 2020

Jnl of Sandwich Structures & Materials

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The dynamic failure of carbon/epoxy sandwich plates with polyvinyl chloride foam core subjected to foam projectile impact is experimentally analyzed in this research. The effects of intensity of impact impulse, cores density, core thickness on the impact resistance of the composite sandwich plates in terms of deflection of rear sheets are also assessed. The 3D- digital image correlation technique is applied to measure the dynamic deformation of the sandwich plates. The results show that the carbon/epoxy sandwich plates exhibit more excellent impact resistance than aluminum sandwich plates with polyvinyl chloride cores at the similar area mass. The carbon/epoxy sandwich plates experience an obvious spring back, and only a slight plastic deflection can be observed after test. The failure modes of the sandwich plates include plastic deformation, fiber breakage, delamination, matrix crack, debonding, and compression of cores. The damage of plates become more serious with core density and core thickness decreasing, and impact impulse increasing, respectively.

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“…[7] The absorbed water primarily affects the state of the polymeric matrix and fiber/matrix interphase regions by inducing both irreversible and reversible alterations in the microstructure of the matrix through plasticization, hydrolysis, or saponification, thereby adversely affecting their mechanical, chemical, and thermophysical properties. [8] In the past several years, different research groups have attempted to study the durability and performance of glass fiber laminated composites when exposed to various water media, such as distilled water, tap water, seawater, and so on.. [9] Aldajah et al [10] have reported reductions of 60% and 55% in the flexural stiffness of symmetric GFRP composite laminates when subjected to tap water and sea water conditioning, respectively, for 2000 hours. Similarly, for antisymmetric specimens, the reductions were found to be 28% and 29.4%, respectively, when exposed to the same environments.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of seawater absorption and desorption on the long‐term creep performance of graphene oxide embedded glass fiber/epoxy composites

2020

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This study is primarily focused on analyzing the consequences of sea water absorption and desorption on the long-term durability of glass fiber/epoxy (GE) and 0.5 wt% graphene oxide (GO) dispersed glass fiber/epoxy (GO-GE) composites. Both GE and GO-GE composite specimens were initially exposed to natural seawater for a duration of 9 months. Desorption was also carried out for some of the seawater saturated samples. Before ageing, flexural test and dynamic mechanical analysis were carried out to understand the impact of GO incorporation on the characteristics of GE composite. Using gravimetric analysis, the seawater uptake kinetic curves were determined for both the composites. Long-term durability was assessed by performing stepwise isothermal creep and recovery tests in 30 C to 120 C temperature range and analysis of the results involved the use of time-temperature superposition principle for constructing the creep master isotherms in different conditions (before ageing or dry state, saturated state, and desorbed state).

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Experimental investigation on dynamic failure of carbon/epoxy laminates under underwater impulsive loading

Cited by 19 publications

References 31 publications

Fabrication of High Quality, Large Wet Lay-Up/Vacuum Bag Laminates by Sliding a Magnetic Tool

Fabrication of High Quality, Large Wet Lay-Up/Vacuum Bag Laminates by Sliding a Magnetic Tool

Dynamic failure of carbon fiber-reinforced plastics sandwich structures with polyvinyl chloride foam cores subjected to impact loading

Effects of seawater absorption and desorption on the long‐term creep performance of graphene oxide embedded glass fiber/epoxy composites

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