本文選題：泡沫混凝土 + 分離式Hopkinson壓桿(SHPB)��； 參考：《振動與沖擊》2014年17期

【摘要】：為研究輕質(zhì)泡沫混凝土的沖擊動力學(xué)性能,結(jié)合半導(dǎo)體應(yīng)變測試技術(shù)和入射脈沖整形技術(shù)對鋁質(zhì)分離式Hopkinson壓桿(SHPB)裝置進(jìn)行改進(jìn),解決了泡沫混凝土類低阻抗多孔介質(zhì)材料透射信號難采集問題,滿足了加載過程中試件內(nèi)部應(yīng)力均勻性要求。通過調(diào)整沖擊氣壓對密度為220 kg/m3輕質(zhì)泡沫混凝土實(shí)施了不同撞擊桿速度下的單軸沖擊壓縮試驗(yàn)。試驗(yàn)結(jié)果表明,泡沫混凝土試件在沖擊荷載作用下依次經(jīng)歷線彈性階段、屈服階段和孔壁破壞3個階段,且泡沫混凝土試件平均應(yīng)變率與撞擊桿速度表現(xiàn)出較強(qiáng)的線性相關(guān)性。
[Abstract]:In order to study the impact dynamic properties of lightweight foamed concrete (LFC), the aluminum split Hopkinson compression bar shbb device was improved by combining the semiconductor strain measurement technique and the incident pulse shaping technique. It solves the problem that it is difficult to collect the transmission signal of foam concrete with low impedance porous media, and meets the requirements of stress uniformity in the loading process. Uniaxial impact compression tests of lightweight foamed concrete with a density of 220 kg/m3 were carried out under different impinging rod velocities by adjusting the impact pressure. The experimental results show that the foam concrete specimens go through linear elastic stage, yield stage and pore wall failure stage in turn under impact load, and the average strain rate of foam concrete specimen has a strong linear correlation with the impact rod velocity.
【作者單位】： 安徽理工大學(xué)礦山地下工程教育部工程研究中心;
【分類號】：TU528

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 王禮立;爆炸與沖擊載荷下結(jié)構(gòu)和材料動態(tài)響應(yīng)研究的新進(jìn)展[J];爆炸與沖擊;2001年02期

2 胡時勝,王悟,潘藝,周t，

本文編號：1974738