Crashworthiness Through Smart Use Of
High Failure Strain Steel
Author(s)
M. M. H. H. Janssen, J. H. A. Schipperen & A. W. Vredeveldt
Abstract
The crashworthiness of a structure can have a large effect on the area based risk
in case of collisions. Typical examples are chemical tankers sailing the European
inland waterways and offshore structures at our shores. Therefore, the
assessment of crashworthiness is nowadays often included in the design process
of such structures. But what if the design needs to be improved to meet
the crashworthiness requirements? This paper describes a method to improve the
crashworthiness of a ship structure by a smart use of high failure strain steel. It
shows how the use of such material can be effective. High failure strain steels are
normally more expensive than normal shipbuilding steels, so an optimization of
the use of these materials is required. Therefore, a methodology is developed to
determine the critical structural part(s) that would benefit most from the
application of such steels. An example case of an inland waterway chemical
tanker is given to illustrate the procedure. In this example, the crashworthiness of
the design is determined through explicit FEM calculations. An elasto-plastic
material model is used and material failure is included using a through thickness
failure criterion with element deletion. Since this criterion was developed for
mild steel it had to be adapted and validated for high failure strain steel using lab
tests.
Keywords: crashworthiness, high failure strain, maritime structures.
Keywords
crashworthiness, high failure strain, maritime structures
Related Book
Other papers in this volume
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