Effect of Prolonged Ultraviolet Radiation Exposure on the Blast Response of Fiber Reinforced Composite Plates

Javier, Carlos; Smith, T. G.; LeBlanc, James; Shukla, Arun

doi:10.1007/s11665-019-03900-y

Cited by 10 publications

(8 citation statements)

References 23 publications

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“…Peak structural deformations, energy input to the structure and damage mechanics are reported through these studies and further effect of face sheet materials properties and core mass and stiffness on the former are evaluated. Shukla et al 19,20,[49][50][51][52][53][54][55][56][57][58][59] performed lab scale experiments to understand the response of sandwich panels subjected to shock loading. AIREX experiments were carried out where a shock tube facility was used to generate an air shock loading, whereas UNDEX experiments were conducted using controlled explosive loading both at surface pressures and higher hydrostatic pressures mimicking deep-sea environments.…”

Section: Lab Scale Airex and Undex Studiesmentioning

confidence: 99%

“…However, specimens weathered to an equivalent of 20 years of service life showed comparable performance to the ones with 10 years of service life. Similarly, the effect of prolonged exposure to ultraviolet (UV) radiation to blast response of composite panels has also been evaluated 56 Composite panels exposed to 1000 h to UV radiation in an accelerated weathering tester system, were subjected to AIREX loading. UV weathered specimens showed lower out-of-plane displacements when subjected to blast loading compared to the virgin composite specimens.…”

Section: Extreme Environmental Effectsmentioning

confidence: 99%

“…It is interesting to note that, weathering of these panels due to mass diffusion reaches a saturation stage whereas UV weathering does not see any stabilization, and material continues to lose mass throughout the exposure. 56…”

Section: Extreme Environmental Effectsmentioning

confidence: 99%

See 2 more Smart Citations

Advances in naval composite and sandwich structures for blast and implosion mitigations

Wanchoo

Kishore

Pandey

et al. 2022

Jnl of Sandwich Structures & Materials

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Naval structures owing to their operational conditions get exposed to extreme loadings and environments. Along with blasts generated through explosion events, enclosed naval structures are also vulnerable to structural dynamic instability, leading to implosion and catastrophic failure. This review explores state of the art in research work carried out to understand the deformation and damage mechanism of naval sandwich structures both on the surface and deep-sea environments. A brief overview of the current understanding regarding the response of sandwich structures to air shock, underwater shock, and implosion owing to dynamic instability is provided. The effect of environmental conditions on the dynamic response of these structures is also discussed. The article further discusses various mitigation techniques proposed to improve the blast and implosion mitigation of sandwich structures and points out the current research gaps existing in the common understanding.

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Section: Lab Scale Airex and Undex Studiesmentioning

confidence: 99%

Section: Extreme Environmental Effectsmentioning

confidence: 99%

See 1 more Smart Citation

Advances in naval composite and sandwich structures for blast and implosion mitigations

Wanchoo

Kishore

Pandey

et al. 2022

Jnl of Sandwich Structures & Materials

Self Cite

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“…In many engineering applications FRP-based structural composites and their joints are susceptible to aging under harsh environmental conditions such as ultraviolet (UV) radiations, seawater, moisture, high temperature, acidic solution, and fire that have a detrimental effect on FRPs performance. [3][4][5][6] Moisture absorption is noticed as a primary source of FRP composite degradation, which results in the hydrolysis of resin, microcracking, epoxy swelling, and debonding of the fiber/ matrix interface. [7][8][9][10] UV radiations and elevated temperature act as a secondary source, which are responsible for the physical and chemical changes in the constituent resin because of the series of complex processes characterizing UV radiation and oxygen.…”

Section: Introductionmentioning

confidence: 99%

Metal inserts for performance improvement in glass fiber‐reinforced polymer nanocomposite joints under accelerated aging conditions

2021

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In the present work, the accelerated aging of glass/epoxy composite bolted joints was carried out for performance evaluation. The woven glass fiber was used as reinforcement and an optimum wt% of nanoclay as filler was used to counter the accelerated aging attack. The bolted joint specimen and its testing fixture were designed as per ASTM D5961 considering width to hole diameter ratio (W/D) and edge to hole diameter ratio (E/D) as 6 and 5, respectively. The specimens were tested with and without the metal inserts. The specimens were given a cyclic exposure of 8 h of ultraviolet radiation (at 60°C) followed by 4 h of condensation (at 50°C), for a maximum of 500 h. The bolt torque of 0, 2, and 4 Nm were used for the failure analysis of the joint. The metal insert and nanoclay particles proved to be positive contributors for the performance of bolted joints under accelerated aging conditions.

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“…[26] In numerous applications of marine and civil sectors, these FRP composite joints have raised concerns about their long-term durability under harsh environmental surroundings, such as UV radiation, moisture, elevated temperature, alkalinity, and fire. [27][28][29] Moisture absorption is one of the primary causes of degradation in FRP composites, which results in the hydrolysis of resin, epoxy swelling, microcracking, and interfacial debonding between the fiber and the matrix. [30][31][32] Another cause of deterioration in FRPs is UV radiation, which is responsible for the physical and chemical changes in the constituent resin due to a series of complex processes involving UV radiation and oxygen.…”

Section: Introductionmentioning

confidence: 99%

Aging of bolted joints prepared from electron‐beam‐cured multiwalled carbon nanotube‐based nanocomposites with variable torques

et al. 2021

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We evaluate the behavior of a bolted joint prepared from electron beam (EB)-cured carbon/epoxy nanocomposites under accelerated weathering environment at varying bolt tightening torques. For strength improvement, different weight percentages (wt%) of multiwalled carbon nanotubes (MWCNTs) in the range 0.1-0.5 wt% were incorporated into the composite laminates; 0.3 wt % of MWCNT had the maximum tensile strength. The properties of EB-cured composites were compared with those of thermally cured ones. For accelerated weathering, cyclic exposure of ultraviolet (UV) radiation as well as condensation at elevated temperatures was conducted for 1000 h on the nanocomposite specimens. The chemical, physical, thermal, and mechanical properties of the nanocomposites were studied under accelerated aging conditions. To determine the failure loads in the bolted joints, specimens were prepared as per ASTM D5961. It was found that after 1000 h of aging, there was only 5% reduction in the ultimate failure load for joints prepared with the addition of MWCNTs. It was also found that the bolt torque had a positive effect on the performance of the joints. The experimental results were validated with progressive damage analysis using the characteristic curve method along with the Hashin damage criteria.

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Effect of Prolonged Ultraviolet Radiation Exposure on the Blast Response of Fiber Reinforced Composite Plates

Cited by 10 publications

References 23 publications

Advances in naval composite and sandwich structures for blast and implosion mitigations

Advances in naval composite and sandwich structures for blast and implosion mitigations

Metal inserts for performance improvement in glass fiber‐reinforced polymer nanocomposite joints under accelerated aging conditions

Aging of bolted joints prepared from electron‐beam‐cured multiwalled carbon nanotube‐based nanocomposites with variable torques

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