Session: 02-10-02 Fatigue and Fracture Reliability 2

Submission Number: 182238

Mechanical Properties of EH36 and Lean Duplex 2101 Rolled Steel Plate 

This paper presents the results of ASTM E8/E8M standard quasi-static flat “dogbone” style tensile tests augmented with 3D digital image correlation (DIC) video strain monitoring for two types of rolled steel plate:  EH36 and LDX 2101® (a type of lean duplex stainless steel). Both steels were used in a recent set of large double pendulum laboratory structural impact experiments at Memorial University that explored the behaviour ship hull grillage variations (varying structural arrangement and steel type) to impact from both rigid and ice indenters. Tensile tests for specimens aligned 0° with the rolling direction for both steel types are presented. The 3D DIC video strain monitoring results were benchmarked against extensometer data (demonstrating excellent agreement) and allowed the extraction of the elastic Poisson’s ratio and the post-necking true stress – true strain strain-hardening behaviour. A survey of already published mechanical properties for rolled EH36 plate is given and compared with the results of these tests. While mechanical properties of EH36 have already been extensively studied, such published results for LDX 2101® are rare. The strain-rate sensitivity of these steels was explored in a separate set of experiments and are not reported here. The presented mechanical properties for both steels were exercised in quasi-static finite element simulations of similar tensile tests, yielding excellent agreement (except where element distortion becomes significant prior to fracture). The mechanical properties for EH36 and LDX 2101® presented here are suitable for use in quasi-static simulations of ship hull structures composed of these steels.

Presenting Author: Bruce Quinton Memorial University of Newfoundland

Presenting Author Biography: Dr. Bruce Quinton is an Associate Professor and Deputy Head of the Department of Ocean & Naval Architectural Engineering at Memorial University of Newfoundland. His expertise includes capabilities of low- and non-ice-class vessels in ice infested waters; ship hull structural response to extreme/accidental loads; numerical simulation of ice impact; advanced material characterisation and behaviour of Arctic shipbuilding materials; and full-scale laboratory ship impact experimentation. Dr. Quinton’s novel experimental and numerical work on moving/sliding ice loads on hull structures was awarded the 2013 Vice Admiral E. L. Cochrane Award – an international research award from SNAME.
Prior to his faculty appointment, Dr. Quinton worked in industry on Arctic related projects including: ice strengthened vessel design, Arctic issues related to structural safety, Arctic escape, evacuation and rescue (EER) performance criteria, and others.

Authors:

Sthéfano L. Andrade Memorial University of Newfoundland
Bruce Quinton Memorial University of Newfoundland
Jan Van Bergen Femto Engineering
Tom Santegoeds Femto Engineering