Partially-enhanced extended finite element method of crack tip unit
A technology of extended finite element and crack tip, which is applied in the field of extended finite element with partly enhanced crack tip unit, which can solve problems such as difficulty and inconvenient grid division, and achieve the effect of accurate calculation results
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[0025] In this embodiment, a flat tensile model with cracks is used, such as Figure 7-a As shown, a tensile load σ=1Mpa is applied to the upper surface of the model, the bottom edge is the foot support, and the left bottom foot is the fixed support. Height H=2mm, crack length a=0.3mm, plate width b=1mm, material properties: Young's modulus E=1×10 3 Mpa, Poisson's ratio υ=0.3. Assume that the plate is in a plane strain state.
[0026] Such as figure 1 As shown, this embodiment is calculated using the extended finite element method enhanced by the cutting-edge element part, and the main steps are as follows:
[0027] S1, establishing a crack analysis model;
[0028] The specific steps are as follows:
[0029] S11. Carry out grid division on the geometric area and divide it into several units; in this scheme, it is divided into two different grid division schemes, such as Figure 7-b As shown, the layout of graph nodes is 22×42, which is the grid graph used by XFEM-P. Fi...
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