Creep — Burgers Step Load

CreepPASS · 0%

Time-dependent creep, relaxation, viscoelasticity, or viscoplasticity verification. Checks: instantaneous primary and steady creep in one history.

Tolerance:: 5%

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Problem statement

Geometry: Burgers model under 10 MPa: E1=2000 MPa, E2=1000 MPa, eta1=100000 MPa-s, eta2=10000 MPa-s.
Material: Constitutive or analytical definition: eps=sigma/E1+sigma/E2[1-exp(-t E2/eta2)]+sigma t/eta1.
Boundary conditions: Required solver capability: multi_branch_viscoelasticity. Use the loading/path control stated in the setup and preserve the complete response history.
Measured quantity: eps(10 s)=0.0123212055883; eps(100 s)=0.0249995460007.

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=2000 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)=0.0123212055883ε(100 s)=0.0249995460007
Our result	ε(10 s)=0.0123212055883ε(100 s)=0.0249995460007
Deviation	0%
Tolerance	5%
Status	PASS · 0%
Mesh details	4-параметрическая реологическая цепь Бюргерса (последовательные ячейки Максвелла E1=2000 MPa, η1=100000 MPa·с и Кельвина–Фойгта E2=1000 MPa, η2=10000 MPa·с), Δt=1 с

Updated: 2026-10-28 · version not recorded