KikuchiAikenHDR Material: Difference between revisions
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{| | {| | ||
|- | |- | ||
| '''X0.6''' || Bridgestone X0.6, standard compressive stress | | '''X0.6''' || Bridgestone X0.6, standard compressive stress, up to 400% shear strain | ||
|- | |- | ||
| '''X0.6-0MPa''' || Bridgestone X0.6, zero compressive stress | | '''X0.6-0MPa''' || Bridgestone X0.6, zero compressive stress, up to 400% shear strain | ||
|- | |||
| '''X0.4''' || Bridgestone X0.4, standard compressive stress, up to 400% shear strain | |||
|- | |||
| '''X0.4-0MPa''' || Bridgestone X0.4, zero compressive stress, up to 400% shear strain | |||
|- | |||
| '''X0.3''' || Bridgestone X0.3, standard compressive stress, up to 400% shear strain | |||
|- | |||
| '''X0.3-0MPa''' || Bridgestone X0.3, zero compressive stress, up to 400% shear strain | |||
|} | |} | ||
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3) '''$rs''' and '''$rf''' are available if this material is applied to multipleShearSpring (MSS) element. | 3) '''$rs''' and '''$rf''' are available if this material is applied to multipleShearSpring (MSS) element. | ||
Recommended values are '''$rs'''=1/sum(i=0,n-1){ sin( | Recommended values are '''$rs'''=1/sum(i=0,n-1){ sin(pi*i/n)^2} and '''$rf'''=1/sum(i=0,n-1){sin(pi*i/n)}, | ||
where n is the number of springs in the MSS. | where n is the number of springs in the MSS. | ||
For example, when n=8, $rs=0.2500, $rf=0.1989. | For example, when n=8, $rs=0.2500, $rf=0.1989. | ||
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[[Image:KikuchiAikenHDR_StressStrain.png|300px]] | [[Image:KikuchiAikenHDR_StressStrain.png|300px]] | ||
---- | |||
Code Developed by: <span style="color:blue"> mkiku </span> | |||
Latest revision as of 03:15, 1 February 2017
- Command_Manual
- Tcl Commands
- Modeling_Commands
- model
- uniaxialMaterial
- ndMaterial
- frictionModel
- section
- geometricTransf
- element
- node
- sp commands
- mp commands
- timeSeries
- pattern
- mass
- block commands
- region
- rayleigh
- Analysis Commands
- Output Commands
- Misc Commands
- DataBase Commands
This command is used to construct a uniaxial KikuchiAikenHDR material object. This material model produces nonlinear hysteretic curves of high damping rubber bearings (HDRs).
| uniaxialMaterial KikuchiAikenHDR $matTag $tp $ar $hr <-coGHU $cg $ch $cu> <-coMSS $rs $rf> |
| $matTag | integer tag identifying material |
| $tp | rubber type (see note 1) |
| $ar | area of rubber [unit: m^2] (see note 2) |
| $hr | total thickness of rubber [unit: m] (see note 2) |
| $cg $ch $cu | correction coefficients for equivalent shear modulus ($cg), equivalent viscous daming ratio ($ch), ratio of shear force at zero displacement ($cu). |
| $rs $rf | reduction rate for stiffness ($rs) and force ($rf) (see note 3) |
NOTES:
1) Following rubber types for $tp are available:
| X0.6 | Bridgestone X0.6, standard compressive stress, up to 400% shear strain |
| X0.6-0MPa | Bridgestone X0.6, zero compressive stress, up to 400% shear strain |
| X0.4 | Bridgestone X0.4, standard compressive stress, up to 400% shear strain |
| X0.4-0MPa | Bridgestone X0.4, zero compressive stress, up to 400% shear strain |
| X0.3 | Bridgestone X0.3, standard compressive stress, up to 400% shear strain |
| X0.3-0MPa | Bridgestone X0.3, zero compressive stress, up to 400% shear strain |
2) This material uses SI unit in calculation formula. $ar and $hr must be converted into [m^2] and [m], respectively.
3) $rs and $rf are available if this material is applied to multipleShearSpring (MSS) element. Recommended values are $rs=1/sum(i=0,n-1){ sin(pi*i/n)^2} and $rf=1/sum(i=0,n-1){sin(pi*i/n)}, where n is the number of springs in the MSS. For example, when n=8, $rs=0.2500, $rf=0.1989.
EXAMPLE:
Code Developed by: mkiku