Method for confirming stress intensity factor distribution on member crack tip

A technology of stress intensity factor and crack front, applied in complex mathematical operations, etc., can solve problems such as low accuracy, low calculation efficiency, and poor mathematical simulation effect
CN1866245AInactive Publication Date: 2006-11-22ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ZHEJIANG UNIV OF TECH
Publication Date
2006-11-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The disclosed determining method for crack front stress intensity factor distribution of a structural member comprises: providing the thermal load, surface force load and body force load, as well as the general weight function base equation acted by any of three loads; dividing the front into N-1 subsegments by N nodes, and using a basic interpolation function N(s) and local variation function N'j(s) for every node j. This invention can determine the factor distribution for curve-type 3D crack with high precision and efficiency by finite modes and interpolation way.
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Description

(1) Technical field

[0001] The present invention relates to a method for determining the distribution of stress intensity factors at the crack front of structural parts in the field of structural safety analysis and evaluation and a computer calculation program design method, which are used to determine structural parts with high precision and high efficiency in the process of structural safety evaluation Distribution of the stress intensity factor (K) along the crack front in 3D crack front. (2) Background technology

[0002] Generally, there are two methods to determine the stress intensity factor distribution of the crack front in structural parts by computer calculation. One is the direct method of elastic mechanics. It is necessary to perform elastic mechanical calculations on the body with cracks to determine the displacement field or stress field under the load; then according to the obtained displacement field or stress field, the Calculate and determine the K value...

Claims

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