这是因为磁场线圈是在尖端的地方流向地面的，这些线圈的作用是为那些流失并超越弓形波的电子与质子提供通道。
This is because it is at the cusp that magnetic field-lines stream down towards the ground, acting as paths for electrons and protons that have slipped past the bow shock.
本文采用三维有限元模型分析了荷载作用下自上而下裂缝尖端的应力强度因子，并与二维平面应变模型分析的结果进行比较。
In this thesis, the stress intensity factors of top-down cracks caused by loading are calculated using three dimensional finite element model and compared to the results of plane strain model.
纤维对基体开裂起抑制作用并降低了裂纹尖端的应力集中。
Carbon fibers restrained the matrix cracks growth and diminished the crack tip stress intensity factor.
应用推荐