4.15.6.3. PressureDependMultiYield02¶
-
nDMaterial
('PressureDependMultiYield02', matTag, nd, rho, refShearModul, refBulkModul, frictionAng, peakShearStra, refPress, pressDependCoe, PTAng, contrac[0], contrac[2], dilat[0], dilat[2], noYieldSurf=20.0, *yieldSurf=[], contrac[1]=5.0, dilat[1]=3.0, *liquefac=[1.0,0.0],e=0.6, *params=[0.9, 0.02, 0.7, 101.0], c=0.1) PressureDependMultiYield02 material is modified from PressureDependMultiYield material, with:
- additional parameters (
contrac[2]
anddilat[2]
) to account for \(K_{\sigma}\) effect, - a parameter to account for the influence of previous dilation history on subsequent contraction phase (
contrac[1]
), and - modified logic related to permanent shear strain accumulation (
liquefac[0]
andliquefac[1]
).
matTag
(int)integer tag identifying material nd
(float)Number of dimensions, 2 for plane-strain, and 3 for 3D analysis. rho
(float)Saturated soil mass density. refShearModul
(float)(\(G_r\)) Reference low-strain shear modulus, specified at a reference mean effective confining pressure refPress of p’r (see below). refBulkModul
(float)(\(B_r\)) Reference bulk modulus, specified at a reference mean effective confining pressure refPress of p’r (see below). frictionAng
(float)(\(phi\)) Friction angle at peak shear strength in degrees, optional (default is 0.0). peakShearStra
(float)(\(\gamma_{max}\)) An octahedral shear strain at which the maximum shear strength is reached, specified at a reference mean effective confining pressure refPress of p’r (see below). refPress
(float)(\(p'_r\)) Reference mean effective confining pressure at which \(G_r\), \(B_r\), and \(\gamma_{max}\) are defined, optional (default is 100. kPa). pressDependCoe
(float)(\(d\)) A positive constant defining variations of \(G\) and \(B\) as a function of instantaneous effective confinement \(p'\) (default is 0.0)
\(G=G_r(\frac{p'}{p'_r})^d\)
\(B=B_r(\frac{p'}{p'_r})^d\)
If \(\phi=0\), \(d\) is reset to 0.0.
PTAng
(float)(\(\phi_{PT}\)) Phase transformation angle, in degrees. contrac[2]
(float)A non-negative constant reflecting \(K_\sigma\) effect. dilat[2]
(float)A non-negative constant reflecting \(K_\sigma\) effect. contrac[1]
(float)A non-negative constant reflecting dilation history on contraction tendency. liquefac[0]
(float)Damage parameter to define accumulated permanent shear strain as a function of dilation history. (Redefined and different from PressureDependMultiYield material). liquefac[1]
(float)Damage parameter to define biased accumulation of permanent shear strain as a function of load reversal history. (Redefined and different from PressureDependMultiYield material). c
(float)Numerical constant (default value = 0.1 kPa) - additional parameters (
See also notes