An optimisation study of the modified deep-hole drilling technique using finite element analyses applied to a stainless steel ring welded circular disc

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:118

Article

Zheng, Gang^1,3  Hossain, Sayeed^1,4  Kingston, Ed²  Truman, Christopher E.¹  Smith, David J.¹ 

[1] Univ Bristol, Dept Mech Engn, Queens Bldg, Bristol BS8 1TR, Avon, England

[2] VEQTER Ltd, Unit 8 Unicorn Business Pk,Whitby Rd, Bristol BS4 4EX, Avon, England

[3] State Power Investment Corp, Res Inst, South Pk Beijing Future Sci & Technol Pk, Beijing 102209, Peoples R China

[4] Mil Technol Coll, Dept Aeronaut Engn, Al Matar St, Muscat 111, Oman

关键词: Ring weld, Residual stress;    Deep-hole drilling (DHD);    Plasticity;    Finite element method;    Neutron diffraction technique;   

DOI  :  10.1016/j.ijsolstr.2017.04.008

来源: Elsevier

【 摘 要 】

A circular disc containing a partial ring weld was devised to create high levels of residual stress in a relatively small specimen. The aim of the study was to utilise the complex residual stress generated within the weld and to extend the recently developed novel application of the deep-hole drilling technique in measuring residual stresses well over yield stress. This paper presents (1) finite element analysis (FEA) simulation of the residual stresses due to partial welding in an austenitic stainless steel circular disc, (2) measurement of residual stress using non-destructive and semi-destructive techniques and (3) simulation of the semi-destructive residual stress measurement technique. Comparison is made between the FEA predicted residual stress in the weld, the measurements and the reconstructed residual stresses of the measurements. The purpose of the residual stress measurement was to validate the FEA predicted weld residual stress in the circular disc. The FEA simulation of the measurement method was used (1) to explain any discrepancy between the measured and FEA predicted stresses and (2) to further modify and extend the present deep-hole drilling technique and improve its accuracy. The close correlations confirmed the suitability of new modifications made in the deep-hole drilling technique to account for plasticity when measuring near yield residual stresses present in a component. (C) 2017 Elsevier Ltd. All rights reserved.

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