The erosion and wear in the gun barrel will get worse with an increase in the number of projectiles fired. Generally speaking, the ballistic performance of the gun, measured through indicators such as the maximum pressure and the muzzle velocity , will decrease gradually due to gun barrel erosion. However, the above analysis does not agree with the firing test data of certain types of guns, especially of some small-caliber guns. The ballistic performance of such guns will exhibit an increase to their peak values followed by a gradual decrease with the number of rounds fired. This is the so-called interior ballistic peak phenomenon, also named as the hump effect. Taking several kinds of guns as examples, such as a 76 mm gun and a 100 mm gun, we calculated the engraving pressure of the guns by an approximate method and built a lumped-parameter interior ballistic model of the guns that exhibits the effect, according to the interior ballistics theory of guns with erosion and wear. The results of the modeling of the guns under different wear conditions are close to the test data, showing the existence of the peak values of and . The simulation results of some of the other guns that exhibit this phenomenon also show good agreement. Furthermore, it can explain the double-peak phenomenon for some types of guns with double driving bands. It was proven that the mismatch of the structure and the dimensions of the gun bore with those of the projectile driving band is the fundamental cause of this effect. Due to the mismatch, the engraving pressure will first increase and then decrease with the enlargement of the bore dimensions caused by barrel erosion and wear. The variation in the engraving pressure will inevitably lead to the variation in interior ballistic performance in the life cycle of the gun. This observed process appears to explain the interior ballistic peak phenomenon.
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September 2010
Research Papers
Mechanism of Interior Ballistic Peak Phenomenon of Guns and Its Effects
Chenli Tao,
Chenli Tao
State Key Laboratory for Manufacturing Systems Engineering,
e-mail: tao_tcl@hotmail.com
Xi’an Jiaotong University
, Xi’an, Shaanxi 710049, China; Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
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Yurong Zhang,
Yurong Zhang
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
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Sanqun Li,
Sanqun Li
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China; School of Mechatronics Engineering, Beijing Institute of Technology
, Beijing 100081, China
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Changzhi Jia,
Changzhi Jia
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
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Yongjian Li,
Yongjian Li
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
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Xifa Zhang,
Xifa Zhang
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
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Zhengjia He
Zhengjia He
State Key Laboratory for Manufacturing Systems Engineering,
Xi’an Jiaotong University
, Xi’an, Shaanxi 710049, China
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Chenli Tao
State Key Laboratory for Manufacturing Systems Engineering,
Xi’an Jiaotong University
, Xi’an, Shaanxi 710049, China; Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, Chinae-mail: tao_tcl@hotmail.com
Yurong Zhang
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
Sanqun Li
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China; School of Mechatronics Engineering, Beijing Institute of Technology
, Beijing 100081, China
Changzhi Jia
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
Yongjian Li
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
Xifa Zhang
Shijiazhuang Mechanical Engineering College
, Shijiazhuang, Hebei 050003, China
Zhengjia He
State Key Laboratory for Manufacturing Systems Engineering,
Xi’an Jiaotong University
, Xi’an, Shaanxi 710049, ChinaJ. Appl. Mech. Sep 2010, 77(5): 051405 (5 pages)
Published Online: June 9, 2010
Article history
Received:
July 31, 2009
Revised:
January 29, 2010
Posted:
April 12, 2010
Published:
June 9, 2010
Online:
June 9, 2010
Citation
Tao, C., Zhang, Y., Li, S., Jia, C., Li, Y., Zhang, X., and He, Z. (June 9, 2010). "Mechanism of Interior Ballistic Peak Phenomenon of Guns and Its Effects." ASME. J. Appl. Mech. September 2010; 77(5): 051405. https://doi.org/10.1115/1.4001561
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