ABAQUS_实例

FEM ------ ABAQUS Practice

1. Problem Definition

Fracture mechanics concerns the interaction of the applied crack driving force and materials fracture resistance. For simple geometry and linear elastic materials fracture parameters can be easily calculated based on existing analytical equations. For complicated geometry and elastic-plastic materials finite element method is necessary. The main purpose of these computational exercises is to use ABAQUS to calculate the fracture parameters of a 2D plane strain single edge notched specimen.

1.1 Specimen geometry

The dimension of specimen is shown in Figure 1. The crack size (a) is 20 mm, specimen depth (w) is 50 mm and length (L) is 300 mm.

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Figure 1 Dimensions of the specimen considered in this course

1.2 Materials

In general, four materials, one linear elastic material and three elastic-plastic materials will be considered in this exercise.

1.2.1 Linear elastic material

A linear elastic material will be considered first. Typical stress-strain curve for a linear elastic material is shown in Figure 2. There are two materials constants associated with a linear elastic material: Young’s modulus E and Poisson ratio ν.

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