# KikuchiAikenHDR Material

 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亚洲城手机版网页登录 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]亚洲城手机版网页登录, 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