本文選題：擾動增長 + 彈塑性固體　； 參考：《物理學報》2017年07期

【摘要】：研究了沖擊波加載彈塑性材料擾動自由面的動力學演化過程,分析了高能炸藥爆轟驅(qū)動時初始擾動與材料性質(zhì)對擾動增長的影響.研究結果表明:初始擾動的振幅與波長之比越高,擾動越易增長,強度越高的材料擾動增長幅度越小;擾動增長被抑制時,尖釘?shù)淖畲笳穹c增長速度無量綱數(shù)之間存在線性近似關系,進一步理論分析表明尖釘?shù)恼穹鲩L因子與加載壓力、初始擾動形態(tài)和材料強度有關,該理論關系作為擾動增長規(guī)律的線性近似在一定范圍內(nèi)適用于多種金屬材料.
[Abstract]:The dynamic evolution process of the shock wave loaded elastoplastic material perturbation free surface is studied. The effects of initial disturbance and material properties on the disturbance growth are analyzed. The results show that the higher the ratio of the amplitude to the wavelength of the initial disturbance, the easier the disturbance increases, and the smaller the increase amplitude of the material disturbance is, when the disturbance growth is suppressed, There is a linear approximate relationship between the maximum amplitude of the spike and the dimensionless number of the growth rate. Further theoretical analysis shows that the amplitude growth factor of the nail is related to the loading pressure, the initial disturbance morphology and the material strength. As a linear approximation of the disturbance growth law, the theoretical relation can be applied to a variety of metal materials in a certain range.
【作者單位】： 北京理工大學機電學院;北京應用物理與計算數(shù)學研究所計算物理重點實驗室;中國工程物理研究院研究生部;
【基金】：國家自然科學基金(批準號:11272064)資助的課題~~
【分類號】：O383
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本文編號：2091415