Coupled Modeling Of Structural Strength
Author(s)
P. P. Prochazka & J. Trckova
Abstract
Numerical methods seem to be the cheapest tool for assessing underground
structures. However, there exists one obstacle in applications of any numerical
method which is a lack of information concerning the input data, particularly the
knowledge of material properties. If the theory of damage should be involved in
the formulation of the problem to be solved, special treatment is required. The
methods, which are extensively used, start with realization of the trial body by a
continuum. We can name \“Cohesive zone method”, which deals with
Barenblatt's theory, for example. In our problem such methods are difficult to
apply and exhibit unreal behavior, according to a couple of test examples. This is
why test experiments have been carried out to gain further information towards a
reasonable approach for solving the problem. The free hexagon method seems to
be very promising. The method will be described and basic formulas will be
derived, and then applications to assessment of structural strength will be
presented.
Keywords: distinct element methods, the free hexagon method, laboratory
experiments, structural strength.
1 Introduction
The free hexagon method belongs to a great family of discrete element methods,
Cundall, [1], Moreau [5]. It enables designers and researchers to describe the
material behavior of structures from the point of view of damage mechanics,
localization of stresses and fracture mechanics. Why hexagonal shape of the
elements? The answer is: this shape is "almost" circular (the shape of grains,
stones, fibers, etc.) and in the same time it is possible to cover the domain
describing the structure (or its part) with the least geometrical error.
Keywords
distinct element methods, the free hexagon method, laboratory
experiments, structural strength
Related Book
Other papers in this volume
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