Author(s): Kurt M. Reinicke; Rolf Remer

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Abstract: Plastic limit analysis is a simple but useful tool for solving practical engineering problems of ultimate strength in which failure by plastic collapse is the governing condition. Its methods, which have been widely applied to soil and rock mechanics, metal-deforming processes and even the design of reinforced concrete structures, also appear to be useful for the description of ice-crushing failure. A basic element of any plasticity theory is a yield function. Yield functions are used to describe strength behaviour and must therefore possess the strength characteristics of the material under investigation. In the context of plastic limit analysis the proper choice of a yield function becomes even more important since this function is not only used to describe material strength but also determines the materials post-yield behaviour through what is known as the normality rule up to the point where fracture occurs. Knowing this behaviour one can apply the limit design theorems to derive upper and lower bounds for the collapse load in many practical problems. The solution procedure needed to implement this approach has been explored for several yield functions. The application to ice failure requires only the definition of appropriate strength information and the measurement of sufficient data to assess the adequacy of this approach.

DOI:

Year: 1978