Bendingofnormalpenetratingprojectilesinduced byasymmetricalmassabrasion
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摘要: 给出了在一定的非对称质量磨蚀条件下垂直于弹体侵彻方向的横向荷载,并结合考虑质量磨蚀的 弹体轴向阻力计算方法,得到了正侵彻弹体在压弯联合作用下的屈服分析方法。讨论了影响弹体由于非对称 质量磨蚀而弯曲屈服的主要因素。分析表明,弹体的危险截面在承受较大的轴向荷载时,对由非对称质量磨 蚀导致的横向荷载极为敏感。Abstract: Asymmetricalmassabrasionisoneofthedominantreasonstocauseaprojectilebending, yawingandbreakwhenitstrikesaconcretetargetnormallyathighvelocity.Thesphericalcavity-expansionmodelisemployedtoconstructthetransverseloadinthecaseofasymmetricalmassabrasion. Withconsideringtheaxisdragforcethatcanreflectthecontinuousvaryingofprojectilenoseshape,a methodisproposedtoanalyzetheyieldingofanormalpenetratingprojectileunderthecombinationof compressionandbendingduetoasymmetricalmassabrasion.Itindicatesthatthecriticalyielding cross-sectionofaprojectileisverymuchsensitivetothetransverseloadinducedbyasymmetricalmass abrasionwhenitsufferslargeaxisdragforce.
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Key words:
- mechanicsofexplosion /
- bending /
- asymmetricalmassabrasion /
- normalpenetrationprojectile /
- yielding /
- concretetarge
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