4.8.2 Test 1B: 2D plane stress – uniaxial displacement, secondary creep

Product: Abaqus/Standard

Element tested

CPS8R

Problem description

Material:

Young's modulus = 200 × 10³ N/mm², Poisson's ratio = 0.3, Creep law: = A, A = 3.125 × 10^–14 per hour ( in N/mm²), n = 5.

Boundary conditions:

on line AD, at mid-point of line AD and on line BC.

Reference solution

This is a test recommended by the National Agency for Finite Element Methods and Standards (U.K.): Test 1(b) from NAFEMS Publication Ref: R0027, “NAFEMS Fundamental Tests of Creep Behaviour,” June 1993.

Results and discussion

The results are shown in the following table. The values enclosed in parentheses are percentage differences with respect to the reference solution.

Abaqus Results
t
0.00	200.00 (0.00%)
0.1359	127.35 (1.41%)
1.2918	75.71(1.98%)
6.3455	51.27 (2.42%)
48.736	30.94 (2.80%)
372.67	18.71 (3.38%)
1000.00	14.67 (3.75%)

Remarks

The total creep time for this test is 1000 hours. The times listed in the above table are the times calculated by the Abaqus automatic time stepping algorithm with CETOL = 5. × 10^–6.

Input file

ncr1br8x.inp

CPS8R elements.