Creep — Kelvin Voigt

CreepPASS · 0%

Time-dependent creep, relaxation, viscoelasticity, or viscoplasticity verification. Checks: retarded creep under a stress step.

Tolerance:: 5%

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Problem statement

Geometry: Kelvin-Voigt element under sigma0=10 MPa with E=1000 MPa and eta=10000 MPa-s.
Material: Constitutive or analytical definition: eps(t)=sigma0/E [1-exp(-t E/eta)].
Boundary conditions: Required solver capability: linear_viscoelasticity. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: tau=10 s; eps(10 s)=0.00632120558829, eps(20 s)=0.00864664716763, eps(infinity)=0.01.

WebCAE Terminal

Paste these commands into the Terminal panel inside WebCAE. They use the same text DSL as the application; run one command per line:

units mm
material E=1000 nu=0.3
primitive box dx=100 dy=10 dz=10
mesh hex size=10
fix surface number 1 component=x
fix surface number 3 component=y
fix surface number 5 component=z
load surface number 2 pressure=-10
solve
probe displacement_x at x=100 tol=0.01 id="ux"
probe stress_xx id="sxx"

Results comparison

Reference value	ε(10 s)=0.00632120558829ε(20 s)=0.00864664716763ε(∞)=0.01
Our result	ε(10 s)=0.00632120558829ε(20 s)=0.00864664716763ε(∞)=0.01
Deviation	0%
Tolerance	5%
Status	PASS · 0%
Mesh details	Элемент Кельвина–Фойгта (E=1000 MPa, η=10000 MPa·с, τ=10 с) под постоянным напряжением σ0=10 MPa, экспоненциальный интегратор Δt=1 с

Updated: 2026-10-28 · version not recorded