Zobrazeno 1 - 10
of 219
pro vyhledávání: '"T.H.C. Childs"'
Publikováno v:
CIRP Annals. 70:61-64
A novel methodology to map the friction and normal stress distribution on the rake face using Partially Restricted Contact Length Tools in orthogonal cutting tests is proposed. The influence of cutting speed, feed and coatings on tool-chip friction w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a350c02fe7ac8eb3903fa38a9ac9a94
https://doi.org/10.1016/j.cirp.2021.03.002
https://doi.org/10.1016/j.cirp.2021.03.002
Autor:
T.H.C. Childs
Publikováno v:
Procedia CIRP. 82:26-31
In previous papers the present author has successfully predicted chip formation in machining carbon steels with a model that supposes all carbon steels to have the same flow stress thermal softening and a temperature independent strain rate hardening
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87fc37b14303df832b895caa54da8061
https://doi.org/10.1016/j.procir.2019.03.222
https://doi.org/10.1016/j.procir.2019.03.222
Measured forces, chip geometry and tool temperatures from machining a mill annealed Ti6Al4V at cutting speeds mainly from 1 to 100 m/min, but in some cases down to 0.1 m/min, are reported, as well as mechanical testing of the material. Finite element
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::21d82d89f32dee4e284dc121b4bc19d7
https://eprints.whiterose.ac.uk/126440/1/manuscript_accepted_19_01_2018.pdf
https://eprints.whiterose.ac.uk/126440/1/manuscript_accepted_19_01_2018.pdf
Publikováno v:
Machining Science and Technology. 19:174-181
Thermography (thermal imaging) is a well-established experimental method for studying cutting tool temperature distributions. In one form, cutting edge temperatures within the chip / tool contact area are deduced from thermal images of tool faces nor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af2b71a326dec1d5411f83d7f16fab57
https://doi.org/10.1080/10910344.2014.991027
https://doi.org/10.1080/10910344.2014.991027
Autor:
Andrew Otieno, T.H.C. Childs
Publikováno v:
Machining Science and Technology. 16:96-110
Finite element simulations are reported of the machining of carbon and low alloy steels at speeds from 50 to 300 m/min and feeds from 0.125 to 0.3 mm/rev. Their mechanical models include yield delay (resulting in an upper yield point followed by a yi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::929c049a33c4702049e68696099ef37c
https://doi.org/10.1080/10910344.2012.648568
https://doi.org/10.1080/10910344.2012.648568
Autor:
T.H.C. Childs
Publikováno v:
Procedia CIRP. 1:78-83
A Johnson-Cook type damage law, with pressure and temperature coefficients from published literature, is applied to simulations of carbon steel chip formation in general engineering built up edge (bue) conditions. Secondary shear zone damage and stra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3709582406fa1baba17817404d11fc6
Autor:
R. Rahmad, T.H.C. Childs
Publikováno v:
International Journal of Mechanical Sciences. 51:465-472
Experimental measurements of cutting and thrust forces and chip shear plane angles have been carried out for six steels turned at a feed of 0.25 mm/rev at speeds from 50 to 250 m/min. The results have been successfully reproduced by finite element si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bce022c3078e1e83555994d360a409cc
https://doi.org/10.1016/j.ijmecsci.2009.04.001
https://doi.org/10.1016/j.ijmecsci.2009.04.001
Autor:
T.H.C. Childs
Publikováno v:
International Journal of Mechanical Sciences. 51:402-411
Previous models of how a metal's flow stress behaviour influences continuous chip formation in machining have described flow stress dependence on strain purely in terms of a strain-hardening exponent. For ferrous metals in their softened state but no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2232913dd8e08109fa9b29d9329b4f39
https://doi.org/10.1016/j.ijmecsci.2009.03.007
https://doi.org/10.1016/j.ijmecsci.2009.03.007
Publikováno v:
Materials Science Forum. :516-523
This paper presents the results of a recent comprehensive investigation of selective laser melting (slm) of prealloyed gas and water atomised M2 and H13 tool steel powders. The objective of the study was to establish the parameters that control the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79973649dbac08c984528371b5f792ee
https://doi.org/10.4028/www.scientific.net/msf.514-516.516
https://doi.org/10.4028/www.scientific.net/msf.514-516.516
Autor:
T.H.C. Childs
Publikováno v:
International Journal of Mechanical Sciences. 48:307-322
Finite element simulations of metal machining chip formation have been carried out with model materials that have been given a range of thermal softening and strain hardening behaviours. For materials that are approximately perfectly plastic, predict
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0fee7bb0053c958364792a98fff3479
https://doi.org/10.1016/j.ijmecsci.2005.09.012
https://doi.org/10.1016/j.ijmecsci.2005.09.012