Multishot performance of an insulator in a laboratory electromagnetic launcher

Gee, R.M.; Persad, C.

doi:10.1109/20.911833

Cited by 12 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Laser pulse heating also produced the same soft waxy epoxy pyrolysis product seen in the fired insulator specimen. Some of the features are similar to those reported by Gee and Persad [1] in the transition region.…”

Section: Results Summarysupporting

confidence: 86%

“…There are several deep scratches adjacent to the delaminated area. There is also general damage that is similar that described in Gee and Persad [1] in the transition region: epoxy degradation and subsequent fiber removal, possibly by gas wash behind the high velocity projectile. There is no other indication of uniform mechanical damage to the insulator surface that would be expected from general mechanical contact with the moving projectile.…”

Section: Resultssupporting

confidence: 65%

“…Gee and Persad [1] studied the damage of G10 insulators in a 7 meter medium caliber (4mm square bore) railgun. The progress of the degradation was monitored during a 10 shot sequence of firings.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of HEMCL Railgun Insulator Damage

Côté¹,

Johnson²,

Truszkowska³

et al. 2006

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to

show abstract

Section: Results Summarysupporting

confidence: 86%

Section: Resultssupporting

confidence: 65%

See 1 more Smart Citation

Analysis of HEMCL Railgun Insulator Damage

Côté¹,

Johnson²,

Truszkowska³

et al. 2006

View full text Add to dashboard Cite

show abstract

“…However, G10 insulator was vulnerable to delamination damage due to projectile impact and rail compression in the complex in‐bore multi‐physics environment, which restricted the service life of the entire EMRL. Gee [12] found that G10 insulator was impacted by launch package with transverse acceleration, resulting in obvious surface damage as well as imperceptible internal damage. Watt [13] pointed out that G10 insulator suffered large‐scale surface damage from interaction with the projectile and had to be replaced after three or four shots.…”

Section: Introductionmentioning

confidence: 99%

Delamination failure analysis of G10 insulator in electromagnetic rail launcher

Liu

Tan

et al. 2023

High Voltage

View full text Add to dashboard Cite

The electromagnetic (EM) rail launcher G10 insulator is prone to delamination damage during launch, which affects the service life of the insulator. Through the secondary development of ABAQUS® commercial finite‐element software, an EM‐structure coupling launch dynamics model considering projectile‐barrel coupling is established. The simulation indicates that the transverse swing of the projectile changes in a sine‐like law, and the time of the upper half wave corresponds to the pulse width of the impact force pulse waveform. The stress concentration occurs on the inner surface of the insulator where the contact‐impact occurs, resulting in impact damage. The midline of the insulator inner surface bears a large compressive strain under the action of pre‐tightening force, and the insulator is compressed oscillatingly under the influence of the time‐varying load of the rail during launch. Under the condition of repeated launch, the launch package repeatedly impacts the insulator, and the alternating load of the rail is cyclically loaded on the insulator with impact damage, which will cause the compression fatigue of the insulator and the expansion of impact damage crack. They are the main reasons for the delamination failure of insulator, and the experimental analysis is carried out. This study provides a method to study the delamination failure mechanism of the insulator, and provides guidance for improving the life of the insulator.

show abstract

Armature Transition and Its Effects on Bore Insulators of Electromagnetic Rail Launchers

Zhao

et al. 2023

Lecture Notes in Electrical Engineering

View full text Add to dashboard Cite

Multishot performance of an insulator in a laboratory electromagnetic launcher

Cited by 12 publications

References 15 publications

Analysis of HEMCL Railgun Insulator Damage

Analysis of HEMCL Railgun Insulator Damage

Delamination failure analysis of G10 insulator in electromagnetic rail launcher

Armature Transition and Its Effects on Bore Insulators of Electromagnetic Rail Launchers

Contact Info

Product

Resources

About