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This paper describes fracture mechanics simulation with a partitioned iterative coupling method. Here an analysis object, i.e. a cracked structure, is decomposed into two domains, i.e. the one with a crack and the other without crack, both of which are analyzed separately. The size of the cracked domain is smaller, whereas the other domain is much larger. Fracture mechanics analysis is performed only...
This paper introduces through the Ansys parametric design language (APDL) to establish finite element model containing surface semielliptical crack expansion of power station heat exchange tube. The type of finite element is used in this program is isoparametric degradation singular element, whice simulates crack stress singularities. And the crack front is token discrete. Based on this kind of finite...
Pipe plays an important role in the petrochemical industry. Developing pipe testing technique can avoid or decrease accidents and is an important guarantee for the safety service of pipe. In this paper, a method is presented to identify crack location and size, which is based on the finite element method (FEM) and model modification. Pipe structure is dispersed into a series of nested thin-walled...
A triple junction, joining place of a conductor, insulator, and gas substance, is a critical place with low dielectric strength in a high voltage apparatus. Around this triple junction, the electric field intensity is abruptly increased and the breakdown phenomena can be easily observed. To predict the breakdown characteristics of the triple junction, it is essential to estimate the distributions...
The parameters of adhesively bonding patch, which include patch materials, patch size, patch thickness, have been analyzed on the stress concentration factor and the stress intensity factor (SIF) thanks to the 3D finite element method (FEM) in the paper. The adhesive shear modulus and thickness are studied in this paper as well. The aluminum sandwich face panel is analyzed and the results show that...
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