000224374 001__ 224374
000224374 005__ 20190812205935.0
000224374 0247_ $$a10.1088/1755-1315/49/12/122010$$2doi
000224374 02470 $$2DOI$$a10.1088/1755-1315/49/12/122010
000224374 037__ $$aCONF
000224374 245__ $$aImpact erosion prediction using the finite volume particle method with improved constitutive models
000224374 269__ $$a2016
000224374 260__ $$c2016$$bIOP Publishing Ltd
000224374 300__ $$a10
000224374 336__ $$aConference Papers
000224374 490__ $$aIOP Conference Series: Earth and Environmental Science$$v49
000224374 520__ $$aErosion damage in hydraulic turbines is a common problem caused by the high- velocity impact of small particles entrained in the fluid. In this investigation, the Finite Volume Particle Method is used to simulate the three-dimensional impact of rigid spherical particles on a metallic surface. Three different constitutive models are compared: the linear strain- hardening (L-H), Cowper-Symonds (C-S) and Johnson-Cook (J-C) models. They are assessed in terms of the predicted erosion rate and its dependence on impact angle and velocity, as compared to experimental data. It has been shown that a model accounting for strain rate is necessary, since the response of the material is significantly tougher at the very high strain rate regime caused by impacts. High sensitivity to the friction coefficient, which models the cutting wear mechanism, has been noticed. The J-C damage model also shows a high sensitivity to the parameter related to triaxiality, whose calibration appears to be scale-dependent, not exclusively material-determined. After calibration, the J-C model is capable of capturing the material’s erosion response to both impact velocity and angle, whereas both C-S and L-H fail.
000224374 542__ $$fCC BY
000224374 700__ $$aLeguizamón, Sebastián
000224374 700__ $$g196478$$aJahanbakhsh, Ebrahim$$0243107
000224374 700__ $$aMaertens, Audrey
000224374 700__ $$g170539$$aVessaz, Christian$$0244465
000224374 700__ $$g249847$$aAlimirzazadeh, Siamak$$0249190
000224374 700__ $$aAvellan, François
000224374 700__ $$aJahanbakhsh, Ebrahim
000224374 700__ $$aVessaz, Christian
000224374 700__ $$aAlimirzazadeh, Siamak
000224374 7112_ $$dJuly 8-4, 2016$$cGrenoble, France$$a28th IAHR Symposium on Hydraulic Machinery and Systems
000224374 773__ $$q122010$$j49$$tProceedings of the 28th IAHR Symposium on Hydraulic Machinery and Systems, IOP Conference Series: Earth and Environmental Science
000224374 8564_ $$uhttps://infoscience.epfl.ch/record/224374/files/Impact%20erosion%20prediction%20using%20the%20finite%20volume%20particle%20method%20with%20improved%20constitutive%20models.pdf$$s294058
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000224374 8560_ $$ffrancois.avellan@epfl.ch
000224374 909C0 $$xU10309$$pLMH$$0252135
000224374 909CO $$ooai:infoscience.tind.io:224374$$qGLOBAL_SET$$pconf$$pSTI
000224374 917Z8 $$x254092
000224374 917Z8 $$x104417
000224374 917Z8 $$x104417
000224374 937__ $$aEPFL-CONF-224374
000224374 973__ $$rREVIEWED$$aEPFL
000224374 980__ $$aCONF