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Fem-based limit and shakedown analysis for design and integrity assessment in European industry

Objective



Objectives and content:

Important industries like marine and offshore technology, power generating, nuclear, chemical, process and oil refinement industries operate a large number of safety-critical components. Many advanced structural components must safely function under heavy loading conditions: ship and offshore structures in heavy sea or ship collision, nuclear and chemical reactors, thermal engines, pressure vessels and piping. All these components behave ductile and develop plastic deformations under severe loading or under some normal operating conditions. Consequently the relevant design codes, integrity assessment procedures or classification rules use Limit and Shakedown Analysis (LISA) concepts of plasticity. But they are only developed for idealised structures, which do hardly represent industrial problems of realistic complexity. Idealisations may lead to inferior design and unknown sa estimations show that about 4% of the gross economic product are lost in America and Europe through fracture.

The aim of the proposed research is to reduce or to remove the need for idealised safety and reliability analyses by developing the Finite Element Method (FEM) based LISA concept. Hard numerical problems have restricted its application to mainly academic problems. More recently, promising methods have been proposed for FEM based LISA. It is now the right time to combine and extend the different approaches to develop assessment tools for perfect and for crack-containing industrial structures under complex thermo-mechanical loading. The consortium was chosen to represent the wide scope of methods and range of industries: A research centre and two universities contribute expertise of LISA, the required numerical methods and application to steel structures, fracture mechanics, structural reliability and plant safety. The consortium comprises four industrial partners including a SME and an industrial sub-contractor: a power plant manufacturer and an end-user, a classification society, an FEM supplier, and a testing and consulting company. BE97-4547

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

FORSCHUNGSZENTRUM JUELICH GMBH
Address
Wilhelm-johnen-straße
52425 Juelich
Germany

Participants (7)

AACHEN UNIVERSITY OF TECHNOLOGY
Germany
Address
Templergraben 64
52056 Aachen
ARISTOTLE UNIVERSITY OF THESSALONIKI
Greece
Address
Egnatia Street
54006 Thessaloniki
BUREAU VERITAS S.A.
France
Address
17 Bis,place Des Reflets 17 Bis, Paris La Defense 2
92400 Courbevoie
ELECTRICITE DE FRANCE
France
Address
1,Avenue Du General De Gaulle 1
92141 Clamart
FRAMATOME ANP GMBH
Germany
Address
Freyeslebenstrasse 1
91058 Erlangen
INTES - Ingenieurgesellschaft für Technische Software mbH
Germany
Address
16,Schulze-delitzsch-strasse
70565 Stuttgart
Université de Liège
Belgium
Address
21,Rue Ernest Solvay
4000 Liège