Design and identification of high performance steel alloys for structures subjected to underwater impulsive loading

Tran, P 2012, 'Design and identification of high performance steel alloys for structures subjected to underwater impulsive loading', International Journal of Solids and Structures, vol. 49, no. 13, pp. 1573-1587.


Document type: Journal Article
Collection: Journal Articles

Title Design and identification of high performance steel alloys for structures subjected to underwater impulsive loading
Author(s) Tran, P
Year 2012
Journal name International Journal of Solids and Structures
Volume number 49
Issue number 13
Start page 1573
End page 1587
Total pages 15
Publisher Pergamom Press
Abstract Martensitic and austenitic steel alloys were designed to optimize the performance of structures subjected to impulsive loads. The deformation and fracture characteristics of the designed steel alloys were investigated experimentally and computationally. The experiments were based on an instrumented fluid-structure interaction apparatus, in which deflection profiles are recorded using a shadow Moiré technique combined with high speed imaging. Fractographic analysis and post-mortem thickness reduction measurements were also conducted in order to identify deformation and fracture modes. The computational study was based on a modified Gurson damage model able to accurately describe ductile failure under various loading paths. The model was calibrated for two high performance martensitic steels (HSLA-100 and BA-160) and an austenitic steel (TRIP-120). The martensitic steel (BA-160) was designed to maximize strength and fracture toughness while the austenitic steel (TRIP-120) was designed to maximize uniform ductility, in other words, to delay necking instability. The combined experimental-computational approach provided insight into the relationships between material properties (strength, uniform ductility, and post-necking ductility) and blast resistance of structures. In particular, the approach allowed identification of material/structure performances by identifying impulse-center deflection behavior and the impulse leading to panel fracture.
Subject Composite and Hybrid Materials
Solid Mechanics
Numerical Modelling and Mechanical Characterisation
Keyword(s) Dynamic fracture
Fluid-structure interaction
High strength steels
Impulsive loading
Necking
TRIP steel
Underwater explosion
DOI - identifier 10.1016/j.ijsolstr.2012.03.014
Copyright notice © 2012 Elsevier Ltd. All rights reserved.
ISSN 0020-7683
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