發(fā)布時(shí)間：2018-03-25 17:37

  本文選題：K玻璃　切入點(diǎn)：沖擊載荷　出處：《高壓物理學(xué)報(bào)》2017年05期

【摘要】：K9玻璃常作為沖擊載荷下失效波(破壞波)萌生機(jī)制和脆性材料動(dòng)態(tài)斷裂特性的研究對(duì)象,而當(dāng)作為沖擊窗口材料時(shí),由于沖擊壓力范圍限制,其光學(xué)特性研究常被忽略。通過(guò)平板撞擊實(shí)驗(yàn),結(jié)合激光多普勒測(cè)速系統(tǒng)(DPS:Doppler Pin System,激光波長(zhǎng)為1 550nm),獲得了沖擊波傳播過(guò)程中不同光學(xué)測(cè)試界面運(yùn)動(dòng)的速度歷史。通過(guò)分析原始干涉信號(hào)和界面速度剖面的時(shí)間對(duì)應(yīng)關(guān)系,獲得了K9玻璃保持沖擊透明性及彈性響應(yīng)的壓力范圍。研究結(jié)果表明,當(dāng)沖擊壓力低于8GPa時(shí),K9玻璃能保持良好的光學(xué)透明性,其動(dòng)態(tài)折射率隨密度的變化呈典型線性關(guān)系。
[Abstract]:K9 glass is often used as an object of study on the initiation mechanism of failure wave (failure wave) and dynamic fracture characteristics of brittle materials under impact loading. However, when K9 glass is used as an impact window material, it is limited by the range of impact pressure. The study of its optical properties is often neglected. Combined with the laser Doppler Pin system and the laser wavelength of 1 550 nm, the velocity history of different optical measurement interfaces in the process of shock wave propagation is obtained. The relationship between the original interference signal and the velocity profile of the interface is analyzed. The pressure range of impact transparency and elastic response of K9 glass is obtained. The results show that the optical transparency of K9 glass is good when the impact pressure is lower than 8GPa, and the dynamic refractive index of K9 glass has a typical linear relationship with the density.
【作者單位】： 中國(guó)工程物理研究院流體物理研究所沖擊波物理與爆轟物理實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(10802080) 中國(guó)工程物理研究院科學(xué)技術(shù)發(fā)展基金(2015B0101006)
【分類號(hào)】：TQ171.112

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