Abstract:The 180 year old stress theory by Cauchy is found to be insufficient to serve as a basis for a modern understanding of material behaviour. Six reasons are discussed in detail: (1) Cauchy's theory, following Euler, considers forces interacting with planes. This is in contrast to Newton's mechanics which considers forces interacting with radius vectors. (2) Bonds in solids have never been taken into account. (3) Cauchy's stress theory does not meet the minimum conditions for vector spaces because it does not hav… Show more
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