本文選題：擾動(dòng)增長(zhǎng) + 彈塑性固體�。� 參考：《物理學(xué)報(bào)》2017年07期

【摘要】：研究了沖擊波加載彈塑性材料擾動(dòng)自由面的動(dòng)力學(xué)演化過(guò)程,分析了高能炸藥爆轟驅(qū)動(dòng)時(shí)初始擾動(dòng)與材料性質(zhì)對(duì)擾動(dòng)增長(zhǎng)的影響.研究結(jié)果表明:初始擾動(dòng)的振幅與波長(zhǎng)之比越高,擾動(dòng)越易增長(zhǎng),強(qiáng)度越高的材料擾動(dòng)增長(zhǎng)幅度越小;擾動(dòng)增長(zhǎng)被抑制時(shí),尖釘?shù)淖畲笳穹c增長(zhǎng)速度無(wú)量綱數(shù)之間存在線性近似關(guān)系,進(jìn)一步理論分析表明尖釘?shù)恼穹鲩L(zhǎng)因子與加載壓力、初始擾動(dòng)形態(tài)和材料強(qiáng)度有關(guān),該理論關(guān)系作為擾動(dòng)增長(zhǎng)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(xué)機(jī)電學(xué)院;北京應(yīng)用物理與計(jì)算數(shù)學(xué)研究所計(jì)算物理重點(diǎn)實(shí)驗(yàn)室;中國(guó)工程物理研究院研究生部;
【基金】：國(guó)家自然科學(xué)基金(批準(zhǔn)號(hào):11272064)資助的課題~~
【分類號(hào)】：O383
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本文編號(hào)：2091415