我们可以画一簇曲线，这簇曲线处处都有一个主方向作为切线，这些曲线叫做应力轨线。

We may draw curves which have everywhere one of these directions for a tangent, these curves are called stress trajectory.

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我们可以画一簇曲线，这簇曲线处处都有一个主方向作为切线，这些曲线叫做应力轨线。

We may draw curves which have everywhere one of these directions for a tangent, these curves are called stress trajectory.

youdao