微裂纹是聚合物特有的一种形态学特征。它是聚合物在张应力作用下，出现于材料的缺陷或薄弱处，与主应力方向相垂直的长条形微细凹槽。由于光线在微裂纹的表面上发生全反射，它在透明塑料中呈现为肉眼可见的明亮条纹，所以也称银纹。
n. microcrack ; clink
结果表明，非弹性体积应变与微裂纹数量直接相关。
It shows that unelastic volumetric strain is directly prepositional to the number of micro-cracks.
这些构造部位的频繁伸缩使应力集中，导致微裂纹的产生。
Constant flexing of the structure concentrates stress, which leads to microscopic cracks.
相对于其他固体，我们的骨骼可以通过修复和重塑去除微裂纹。
As opposed to other solids, however, bone removes the micro-cracks by repair and remodelling.
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