3.24 (b) Components of  (1. Diagonal Element)

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Consider two differential elements  deformed from .

Since

 

For example, if  the original element is  deformed to  then

Thus  represents the ratio of the difference in the squared length to that of original length, when the element originally is aligned along the x-axis. Similar interpretation can be made for other components

Next:3.24 (c) Components of  (2. Off-Diagonal Element)

10/04/01 0:39:41