Dynamics of Interfaces with Static Initial Loading
Dynamics of Interfaces with Static Initial Loading
复制标题
静态初始加载的界面动力学
DOI：
10.1007/978-3-319-00771-7_5
复制
发表时间：
2014
影响因子：
5.1
通讯作者：
J. Cordes
中科院分区：
文献类型：
--
作者：
J. Dodson;Ryan Lowe;J. Foley;Christopher Mougeotte;D. Geissler;J. Cordes
由于缺乏针对性的研究和验证数据，在高速率加载条件下准确建模结构界面的动态响应是具有挑战性的。为了支持开发和验证这些界面动力学的精确的基于物理的模型，使用组合静态扭转载荷与动态压缩载荷进行模拟和实验。弹道冲击产生动态压缩应力波，该动态压缩应力波以已知的静态扭矩传播穿过两个联接的金属杆的螺纹界面。强有力的现象学证据的静态扭转能量的释放和转换，由于所施加的动态载荷被认为是在时间-频率分析。动态波的频带结构也被观察到在一定条件下变化。施加的扭矩示出放松几乎完全在实验过程中，与显着的旋转的传动杆相对于入射杆。其机理被认为是静态扭矩的释放和扭转波的产生。
Accurately modeling the dynamic response of structural interfaces under high rate loading conditions is challenging due to lack of focused studies and validation data. In order to support the development and validation of accurate physics-based models of these interface dynamics, simulations and experiments using combined static torsional loads with dynamic compressive loading are performed. A ballistic impact generates dynamic compressive stress waves that propagate across the threaded interface of two coupled metallic bars with a known static torque. Strong phenomenological evidence of the release and conversion of static torsional energy due to the applied dynamic loads is seen in time-frequency analysis. The frequency band structure of the dynamic waves are also observed to vary under certain conditions. Applied torque is shown to relax almost completely during an experiment, with significant rotation of the transmission bar relative to the incident bar. The mechanism is believed to be release of the static torque and the generation of torsional waves.