The results show that dynamical ductil-ity dominated final velocity of fragments. During tube expansion, the shear fracture appears preferentially a-long the adiabatic shear bands under positive stress, so the adiabatic shear band determines the size and shapeof fragments. Though the fragmentation behaviour of medium carbon Si - Mn bainific steel is close to that ofsteel 50SiMnVB, medium carbon Si - Mn bainitic steel is an ideal candidate material for the tubular bombs be-cause it is better in dynamical ductility, which can enable the tubes to gain high speeds before fragmentation.

結(jié)果表明：材料動(dòng)態(tài)塑性是決定破片最終速度的主要因素www,qqriav,com；圓管膨脹時(shí)外表面形成以剪切為主的裂紋免费看黄网站AV无码app下载，并向內(nèi)擴(kuò)展夜夜爽88888妓女性视频，接近內(nèi)表面的絕熱剪切帶伴隨著圓管的膨脹而擴(kuò)展在线可以直接观看的黄色视频。，并未出現(xiàn)失穩(wěn)現(xiàn)象中文字幕老熟女一区二区，但在正應(yīng)力的作用下成為優(yōu)先的斷裂通道艹逼黄片、決定破片的尺寸和形態(tài)；中碳Si-Mn貝氏體鋼與50SiMnVB鋼的破碎性能相近国产激情性爱，但貝氏體鋼動(dòng)態(tài)塑性很更好无码精品A∨在线观看十八禁国产，破碎前的膨脹量較大、更有利于提高破片初速九九视频热播，是彈箭比較理想的候選材料国产亚洲精品ⅴa在线观看。

NOTE: Due to font limitations, the accent marks in words such as the French "GAVRE" and the German "GRUSON" and "HARTE" have been deleted in this HTML-format version of this document.

而偏偏WS1上沒有MOD1935在22000米以內(nèi)的數(shù)據(jù)，于是就只好用這個(gè)距離的數(shù)據(jù)去將二者對(duì)比了曰批全过程免费视频在线观看直播，如果再看更遠(yuǎn)的距離亚洲一区免费视频，差異還是很明顯的，MOD1935除非用785米的初速欧洲A片网址，否則永遠(yuǎn)強(qiáng)過SKC-34

The paper analyses the reliability of 152 howitzer with Montc Carlo method, and calculatesthe projectile initial velocity of the gun.

本文利用蒙特卡羅方法對(duì)152榴彈炮系統(tǒng)進(jìn)行了可靠性分析亚洲国产一区二区三区，并對(duì)火炮的初速進(jìn)行了可靠性的定量計(jì)算。

The variations of the residual velocity with the initial velocity are obtained.

計(jì)算結(jié)果表明国产哟一区二区三区视频在线看，在火炮初速范圍內(nèi)亚洲中文九九九，長管體的剩余速度隨撞擊速度的增加近似為線性遞增自拍视频偷拍天堂。

"Now," said Harding to his companions, the initial velocity is inproportion to the quantity of powder used.

"初速跟火藥的多少是成正比的。"

A physical model of the process of two propulsions is proposed, and a mathematical mode of interior ballistics of two propulsions is also established based on a 12.7mm test gun, while general effects of various parameters upon maximum pressure and muzzle velocity are revealed.

提出了二次發(fā)射過程的物理模型在线嘿咻，并以12.7mm彈道槍為對(duì)象建立了膛內(nèi)二次發(fā)射內(nèi)彈道數(shù)學(xué)模型五月综合色色，分析了參數(shù)變化對(duì)膛壓和初速的影響規(guī)律。

In order to adapt the demand of the future war,the mondial ballisticians are making great efforts to increase the initial velocity of the gun to antagonize the future high performance flying target and armored target.

為適應(yīng)未來戰(zhàn)爭的需要国产一级啪啪视频免费观看，世界各國彈道學(xué)家都在努力提高火炮彈丸的初速国模AⅤ私拍一区二区，以對(duì)付未來高性能飛行目標(biāo)和裝甲目標(biāo)。

This was necessary to decrease the muzzle velocity of the bullet so it would be below the speed of sound.

這是必要的偷拍视频区一，以減少對(duì)初速的子彈欧美一级特黄大片在线播放一，所以將低于音速。

The 14.5 mm armour-piercing bullet has a muzzle velocity of 1012 m/s and good ballistics.

在14.5毫米穿甲子彈的初速的一○一二米/ s和良好的彈道亚洲爆乳性爱三级片。

The condition of producing the pressure plateau is studied deeply according to the principle of improving the muzzle velocity of gun.

根據(jù)提高火炮初速的有關(guān)理論日韩欧美一级A片在线，研究了形成壓力平臺(tái)的條件。