Investigation on mechanical behavior of composite electromagnetic gun barrel based on the high tension winding

Zu, Lei; Xu, Hui; Zhang, Qian; Jia, Xiaolong; Jin, ShuMing; Li, Debao

doi:10.1016/j.compstruct.2020.112521

Cited by 5 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By applying pre-stress, compression stress is generated, counteracting the electromagnetic forces acting on the system. Several methods have been researched to achieve pre-stress in railguns [ 25 , 26 , 27 ], including interference fitting [ 28 ], bolt pre-tightening [ 14 ], laminate containment prestress, and pre-stressed winding [ 29 ]. Among these methods, bolt pre-tightening and filament winding are the most commonly used for achieving pre-stress in railguns equipped with composite barrels.…”

Section: Introductionmentioning

confidence: 99%

“…Among these methods, bolt pre-tightening and filament winding are the most commonly used for achieving pre-stress in railguns equipped with composite barrels. However, studies on pre-stressed barrels have primarily focused on the stress distribution of the barrel [29][30][31][32][33][34], and there have been few investigations into the mechanism of how pre-stress influences the railgun system. The influence of pre-stressed composite barrels on railguns has been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

et al. 2023

View full text Add to dashboard Cite

Rail expansion significantly impacts the launch precision of a railgun system. Higher precision can be achieved when the extent of expansion is low. This paper investigates three main factors that influence the extent of rail expansion using the finite element method, including pre-stress, electromagnetic load, and stiffness of the insulators. The mean squared error between experiment results and simulating results is less than 0.06, validating the finite element model. The simulated results reveal that the extent of rail expansion increases with a decrease in pre-stress and an increase in electromagnetic pressure and the stiffness of the insulator is the most significant influencing factor, as the use of a stiff insulator not only results in a small extent of rail expansion but also delays the separation between the rails and insulators. The mechanism of how pre-stress influences the railgun system has been proposed. It has been expressed that the pre-stress maintains the integrity of the railgun system by hindering the process of a decrease in the contact surface area between rails and insulators during launch. The study provides a platform to improve the design of the railgun system.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Liu [ 24 ] equalized winding tensions to the residual stress in fibers based on the inverse iteration principle and proposed a process-induced theoretical model to calculate the residual stress. Zu [ 25 ] modelled the winding tension using the equivalent temperature cooling method to fully understand the winding tensions, curing times, and interactions between layers.…”

Section: Introductionmentioning

confidence: 99%

Influence of Filament Winding Tension on the Deformation of Composite Flywheel Rotors with H-Shaped Hubs

Chen

Huan

et al. 2022

Polymers

View full text Add to dashboard Cite

The residual stress plays an important role in composite flywheel rotors composed of filament windings. The fiber tension during high-prestressed winding is the main source of the rotor deformation and residual stress of composite layers. In this study, the effect of the winding tension gradient on deformation was monitored in real-time. Two types of in-plane winding tension fluctuation methods were developed to investigate the effect of tension on deformation. Online and offline measurements were performed for the strain acquisition. A wireless strain instrument was used for online deformation monitoring and a laser scanner was used for the offline surface reconstruction. Additionally, different filament winding strategies were carried out to improve the efficiency of the winding tension by finite element analysis. The results indicated that the deviation between numerical and experimental results was within 8%. Based on the proposed numerical method, the influence of the in-plane and out-of-plane winding tension gradient distributions on the rotation process of the H-shaped rotor was analyzed. An in-plane winding strategy with variable tension was developed, which increased the initial failure speed by 160%.

show abstract

“…Zu successfully designed and manufactured composite cylinders with winding tension up to 266.7 MPa, while the thickness of the composites was limited to 4.5 mm. 20,21 However, the relaxation of prestress becomes more significant and cannot be ignored as the winding tension increases. Fortunately, rapid curing of the resin matrix is a promising method to reduce relaxation.…”

Section: Introductionmentioning

confidence: 99%

Influence of resin curing cycle on the deformation of filament wound composites by in situ strain monitoring

Chen

Huan

et al. 2021

High Performance Polymers

View full text Add to dashboard Cite

The residual stress of metal liners wrapped by composite materials has a significant influence on the service performance of rotating parts, such as flywheel rotors and motor jackets. However, the deformation of the liners, the flow of resins, and the temperature variation during the winding process make it difficult to predict and control this residual stress. In this paper, the process-induced strains were monitored online by a strain gauge with the help of a wireless strain meter. The evolution of this strain during the manufacturing process was fully discussed. A rapid curing resin system was used and its curing properties were tested by differential scanning calorimetry. The mechanical properties of the resin matrix and its composite were characterized. The effect of the curing cycle on the evolution of the residual strain was discussed in detail through comparative experiments. The experimental results show that the use of infrared radiation has a significant advantage regarding residual stress accumulation. This advantage is greater when carbon fiber is used than when glass fiber is used. The prestress in composites of glass fiber and carbon fiber increases by 5.9% and 41.7%, respectively, after cooling.

show abstract

Investigation on mechanical behavior of composite electromagnetic gun barrel based on the high tension winding

Cited by 5 publications

References 21 publications

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

Factors Influencing the Expansion of Arch-Shaped Electromagnetic Railguns with Pre-Stressed Composite Barrels

Influence of Filament Winding Tension on the Deformation of Composite Flywheel Rotors with H-Shaped Hubs

Influence of resin curing cycle on the deformation of filament wound composites by in situ strain monitoring

Contact Info

Product

Resources

About