考慮剪脹效應(yīng)的混凝土動態(tài)柱形空腔膨脹理論
發(fā)布時間:2018-11-19 14:49
【摘要】:同時考慮混凝土的壓縮和擴(kuò)容特性,建立了動態(tài)柱形空腔膨脹理論,其中完整的靶體響應(yīng)為密實(shí)區(qū)-擴(kuò)容區(qū)-開裂區(qū)-彈性區(qū),在擴(kuò)容區(qū)采用擴(kuò)容方程,使用該理論得到了空腔表面應(yīng)力與膨脹速度的表達(dá)式,并使用該式計(jì)算得到彈體侵深和加速度.研究結(jié)果表明,運(yùn)用該理論建立的剛性侵徹方程,其計(jì)算結(jié)果與實(shí)驗(yàn)結(jié)果具有良好的一致性,模型可以較好描述不同頭部形狀尖卵形彈體的侵徹能力以及加速度變化趨勢.
[Abstract]:At the same time, considering the compression and expansion characteristics of concrete, the dynamic cylindrical cavity expansion theory is established, in which the complete target response is dense zone, expansion zone, crack zone and elastic zone, and the expansion equation is adopted in the expansion area. The expressions of cavity surface stress and expansion velocity are obtained by using the theory, and the penetration depth and acceleration of the projectile are calculated by the formula. The results show that the rigid penetration equation established by this theory is in good agreement with the experimental results, and the model can well describe the penetration ability and acceleration trend of different head shape oval projectile.
【作者單位】: 北京理工大學(xué)爆炸科學(xué)與技術(shù)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(11390362,11572048) 國家部委基礎(chǔ)科研項(xiàng)目(B1020132071)
【分類號】:TU37
本文編號:2342666
[Abstract]:At the same time, considering the compression and expansion characteristics of concrete, the dynamic cylindrical cavity expansion theory is established, in which the complete target response is dense zone, expansion zone, crack zone and elastic zone, and the expansion equation is adopted in the expansion area. The expressions of cavity surface stress and expansion velocity are obtained by using the theory, and the penetration depth and acceleration of the projectile are calculated by the formula. The results show that the rigid penetration equation established by this theory is in good agreement with the experimental results, and the model can well describe the penetration ability and acceleration trend of different head shape oval projectile.
【作者單位】: 北京理工大學(xué)爆炸科學(xué)與技術(shù)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(11390362,11572048) 國家部委基礎(chǔ)科研項(xiàng)目(B1020132071)
【分類號】:TU37
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