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Comprehension Vulcanized rubber shows ...

Comprehension
Vulcanized rubber shows a distinctly different stress - strain relation as shown in the figure. The material remains elastic even when it is stretched to over several times its original length. In the case shown in the graph, the length is increased to 8 times its natural length, even then if the stretching forces are removed, it will come back to its original length.

In which part of this large deformation is the stress portinal to strain ?

Text Solution

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In no part of the deformation, stress is proportional to strain.
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