What is it about?
The paper looks at the ways that single flatbar frames respond to a load imposed by a moving cylinder. The cylinder is a novel surrogate for ice. The frame capacity (force vs deflection) is shown to be dependent on a sequence of elasto-plastic deformations and plastic instabilities.
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Why is it important?
The real importance of this paper is its focus on understanding overload response. We expect that design will increasingly move beyond its focus on 'the design point' to look at the full range of behavior capabilities. This paper takes a step in that direction and discusses some of the challenges with this more ambitious approach. We happen to be looking at one class of structures under one type of load, but the broad challenges are already evident.
Perspectives
This work is one part of a much larger body of work involving all the coauthors and others. We have been trying to push the boundaries of design by focusing on direct design and assessment, design by simulation and what we might term 'mechanics based design' where by this we mean to focus on the complexities and nonlinear aspects of the mechanics as a way of improving the quality and value of designs. We feel that this is a more rational approach to risk.
Prof. Claude Daley
Memorial University of Newfoundland
Read the Original
This page is a summary of: Overload response of flatbar frames to ice loads, Ships and Offshore Structures, December 2016, Taylor & Francis,
DOI: 10.1080/17445302.2016.1254520.
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