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A modelling procedure for shear yielding characteristics affected by viscous properties of sand in triaxial compression
Tatsuoka F.a, Nawir H.b,d, Kuwano R.c,d
a Department of Civil Engineering, Tokyo University of Science, Japan
b Department of Civil Engineering, Bandung Institute of Technology, Indonesia
c Publics Works Research Institute, Independent Administrative Institution, Japan
d University of Tokyo, Japan
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]A series of triaxial compression (TC) tests were performed on Toyoura sand to evaluate the viscous effects on the stress-strain behaviour following the shear yielding mechanism. It is shown that very different shear stress and shear strain relations obtained from TC tests performed along different stress paths become rather unique when converted into relationships between the stress parameter Xst = (q/pa)/(p′/p a)βts, which is deemed to control the shear yield mechanism, and the normalized irreversible shear strain energy κ s, which is the stress path-independent strain hardening parameter for shear yielding. Along each inviscid yield locus quantified based on the test results, with an increase in the effective mean principal stress p′ the deviator stress q increases at a relatively large rate while the stress ratio g/p′ decreases at a relatively small rate. According to the non-linear three-component model described in the paper, the stress parameter Xst is decomposed into the inviscid and viscous components, Xsf and Xsv. The inviscid shear yield loci are described in terms of Xsf and develop with an increase in κs. The viscosity function gv(κs) is introduced to relate Xs v to Xsf in the form of Xs v=Xsf ·gv(κ̇ s) based on the test results. It is shown that the viscous effects on the Xst – κs relations obtained from the TC tests performed along a wide variety of stress path could be simulated rather well by the model taking into account the decay of the viscous component Xsv with an increase in κs.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Strain energy,Stress path,Triaxial compression tests,Yield locus (IGC: D6/D7)[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Sand,Strain energy,Stress path,Triaxial compression test,Viscosity,Yield locus (IGC: D6/D7)[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.3208/sandf.44.6_83[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]