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

Wanchoo, Piyush; Kishore, Shyamal; Pandey, Akash; Shukla, Arun

doi:10.1177/10996362221139562

Cited by 6 publications

(5 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nominal thicknesses of the tubes used in this study ranged from 0.98 mm to 1.50 mm, corresponding to diameter-to-thickness (D/h) ratios between 33.9 and 51.8. These dimensions were selected to promote circumferential Mode II (a deformed tube with two circumferential lobes) buckling [5].…”

Section: Experimental Procedures 21 Specimen Design and Preparationmentioning

confidence: 99%

See 1 more Smart Citation

Underwater Implosion and Energy Mitigation of Hybrid Glass-Carbon Composite Shells

Ngwa,

Chaudhary,

Matos

et al. 2023

JMSE

Self Cite

View full text Add to dashboard Cite

Experiments were conducted to investigate the dynamic buckling behavior of underwater hybrid composite tubes. The study focused on roll-wrapped hybrid layered glass-carbon fiber epoxy composite shells with a six-layer quasi-isotropic layup configuration. In addition to control specimens consisting of fully glass fiber-reinforced polymer and carbon fiber-reinforced polymer, four different hybrid layup patterns were examined. These specimens fitted with custom endcaps were placed inside a 7-kiloliter pressure vessel and subjected to increasing hydrostatic pressure until dynamic implosion occurred. High-speed cameras captured the failure event, and the resulting images were analyzed using Digital Image Correlation (DIC) techniques to obtain full-field displacement data. Additionally, tourmaline pressure transducers positioned around the specimens recorded local dynamic pressure histories. The results revealed that the contribution of each ply location varied in the overall failure behavior of the structures. The thickness of the internal plies played a dominant role in enhancing the structural performance, while the stiffness of the outer plies greatly influenced the bending stiffness. The energy released during the collapse was highly dependent on the failure mechanism of the internal plies. Specifically, for the considered geometries, tubes with glass fiber internal plies exhibited significantly lower energy emissions compared to carbon fiber inner plies.

show abstract

Section: Experimental Procedures 21 Specimen Design and Preparationmentioning

confidence: 99%

“…Second, a highamplitude pressure pulse is emitted when the cylinder walls make contact, resulting in an abrupt change in the momentum of the surrounding fluid [2]. This pressure wave has been shown to induce damage to neighboring structures [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Underwater Implosion and Energy Mitigation of Hybrid Glass-Carbon Composite Shells

Ngwa,

Chaudhary,

Matos

et al. 2023

JMSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…Constructing protective structures and devising strategies to withstand blast impacts have been hot topics for many years. In the past two decades, sandwich structures, such as the foam core sandwich panel, have gradually been utilized as protective structures, due to their outstanding performances in resisting blast and projectile impact loading [6][7][8]. With growing requirements for enhanced blast resistance and perforation resistance from foam core sandwich panels, a variety of strategies have been proposed, such as asymmetrical facesheet design, core configuration design, etc.…”

Section: Introductionmentioning

confidence: 99%

Computational Analysis of Sandwich Panels with Graded Foam Cores Subjected to Combined Blast and Fragment Impact Loading

Zhang

et al. 2023

Materials

View full text Add to dashboard Cite

This study aimed to evaluate the performance of sandwich panels with graded foam cores of layered densities against combined blast and fragment impact loading, and to ascertain the optimal gradient of core configuration that would maximize the performance of sandwich panels against combined loading. First, based on a recently developed composite projectile, impact tests of the sandwich panels against simulated combined loading were conducted to provide a benchmark for the computational model. Second, a computational model, based on three-dimensional finite element simulation, was constructed and verified by means of a comparison of the numerically calculated and experimentally measured peak deflections of the back facesheet and the residual velocity of the penetrated fragment. Third, the structural response and energy absorption characteristics were examined, based on numerical simulations. Finally, the optimal gradient of core configuration was explored and numerically examined. The results indicated that the sandwich panel responded in a combined manner involving global deflection, local perforation and perforation hole enlargement. As the impact velocity increased, both the peak deflection of the back facesheet and the residual velocity of the penetrated fragment increased. The front facesheet was found to be the most important sandwich component in consuming the kinetic energy of the combined loading. Thus, the compaction of the foam core would be facilitated by placing the low-density foam at the front side. This would further provide a larger deflecting space for the front facesheet, thus reducing the deflection of the back facesheet. The gradient of core configuration was found to have limited influence on the anti-perforation ability of the sandwich panel. Parametric study indicated that the optimal gradient of foam core configuration was not sensitive to time delay between blast loading and fragment impact loading, but was sensitive to the asymmetrical facesheet of the sandwich panel.

show abstract

“…They characterized the buckling of both carbon fiber and glass fiber composite tubes for several reinforced architectures and geometries. 12,19–22…”

Section: Introductionmentioning

confidence: 99%

“…They characterized the buckling of both carbon fiber and glass fiber composite tubes for several reinforced architectures and geometries. 12,[19][20][21][22] External and internally reinforced metallic cylinders have also been studied. Ring-stiffened cylinders showed increased structural rigidity depending on the axial locations of the rings.…”

Section: Introductionmentioning

confidence: 99%

Effects of ring stiffeners on the underwater collapse behavior of carbon/epoxy composite tubes

Ngwa

Rossell

Matos

et al. 2023

Journal of Composite Materials

Self Cite

View full text Add to dashboard Cite

An experimental study was performed to analyze the dynamic buckling behavior of stiffened composite tubes. The structures analyzed were filament-wound carbon-fiber/epoxy composite tubes with press-fitted compliant and rigid aluminum ring stiffeners. The ring thicknesses were chosen for a consistent buckling pressure for equally spaced one, two, and three compliant stiffener configurations. The composite structures were submerged inside a pressure vessel and then subjected to increasing hydrostatic pressure until buckle initiation. High-speed photography and Digital Image Correlation were used to acquire full-field displacements and velocities of the collapse event. In addition, piezoelectric transducers were used to concurrently record the local dynamic pressure histories along the length of the tube. The results show that increasing the number of stiffeners for the same collapse pressure decreases the overall energy emission from the implosion event by more than 16%. However, the energy mitigation effects are also influenced by the location of the stiffeners in relation to the buckling initiation point.

show abstract

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

Cited by 6 publications

References 92 publications

Underwater Implosion and Energy Mitigation of Hybrid Glass-Carbon Composite Shells

Underwater Implosion and Energy Mitigation of Hybrid Glass-Carbon Composite Shells

Computational Analysis of Sandwich Panels with Graded Foam Cores Subjected to Combined Blast and Fragment Impact Loading

Effects of ring stiffeners on the underwater collapse behavior of carbon/epoxy composite tubes

Contact Info

Product

Resources

About