| 摘 要： | I.Deformation of the continuum can be described as the strain tensor.There are many forms ofthe strain tensors (in theory the number may be infinite).Common strain tensors arewhere (?)_(αβ)((?)~(αβ))and(?)_(αβ)((?)~(αβ)) are the metric tensors of the coordinate system dragged alongaround the deformation,respectively.The strain tensors ε_(αβ) and θ~(αβ) can be defined in the frame before the deformation andalso in the frame after the deformation,which are called the Lagrange strain tensor and the Euler
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