List of Titles

Authors: Laubscher, R. F. , Styger, G. , Oosthuizen, G.A.
Date: 2014
Subjects: Residual stress , Titanium alloys - Fracture
Type: Article
Identifier: uj:5088 , http://hdl.handle.net/10210/13664
Description: In general most manufacturing techniques alter the surface integrity of the final component. Surface integrity refers to the surface properties and their influence on the functional performance of manufactured components1. Machining induced residual stress is a surface integrity descriptor that may have a significant influence on the mechanical behavior of metallic parts subjected to dynamic loads2. Most manufacturing processes introduce some form of residual stress to the material. Cutting or more specifically machining involves large plastic deformation and elevated temperatures that may induce significant residual stresses in the surface and near surface region. When turning steel these stresses are largely tensile in nature and extend to a depth of approximately 200 μm1.
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Authors: Laubscher, R.F. , Styger, G. , Oosthuizen, G.A.
Date: 2014-06
Subjects: Numerical analysis , Machining , Residual stresses , Titanium alloys
Type: Article
Identifier: uj:5055 , http://hdl.handle.net/10210/13603
Description: Machining induced residual stresses may have a significant effect on the mechanical performance of machined parts. AdvantEdge is an advanced finite element code dedicated to the modelling of the machining process. This paper describes a comparative evaluation of modelling results obtained with AdvantEdge with experimental results obtained during turning of Grade 5 (Ti6Al4V) titanium alloy. A two dimensional orthogonal turning process is modelled and compared with experimental data. Comparisons are made relative to residual stress, cutting force and cutting temperature for various different cutting parameters including cutting speed, feed rate and cut depth.
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