这些钾离子占据更大的空间，当玻璃冷却下来的时候，钾离子便挤压在一起，从而在玻璃表面生产一层压应力层。
These larger ions take up more room and are pressed together when the glass cools, producing a layer of compressive stress on the surface of the glass.
文章讨论了航空波导结构密封失效的故障机理，表面活性、胶层弹性模量、热膨胀、以及因环境变化产生应力等引起密封失效的有关因素。
Study on failure mechanism shown: the main cause is the deformation stress due to environment changes that resulted high leakage failure ratio during environment conditional tests.
引入了半无限体的无穷边界条件，推导出半无限层表面的位移与应力关系式。
The relations between the displacements and the stresses on the surface of semi-infinite body are obtained by introducing the infinite boundary conditions.
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