Elements tested
CPE8
CPE8R
ProductsAbaqus/Standard Elements testedCPE8 CPE8R Problem descriptionMesh:Collapsed elements with 1/4 point midside nodes are used at the crack tip. One-quarter of the test geometry is modeled. A coarse and a fine mesh are tested. Material:Young's modulus = 207 GPa, Poisson's ratio = 0.3. Boundary conditions:along edge AB, along edge DE. Loading:Uniform stress, 100 N/mm2. Reference solutionThis is a test recommended by the National Agency for Finite Element Methods and Standards (U.K.): Test 1.1 from NAFEMS publication “2D Test Cases in Linear Elastic Fracture Mechanics,” R0020. Target solution: K/K = 1.325, K = Results and discussionThe results are shown in the following table. The values enclosed in parentheses are percentage differences with respect to the reference solution.
RemarksK = . An average of the J values calculated by Abaqus, excluding the first contour, is used in reporting the results. Experience has shown that the crack-tip elements do not give sufficiently accurate results to give good estimates of the J-integral for the first contour. Input files
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