Quality assurance for fracture mechanical finite element analyses

Timo Mikkola, Hannes Niemi

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

A program system for automated fracture mechanical analyses with three-dimensional (3D) finite element (FE) models has been developed. The main application has been safety analyses of pressurized components of nuclear power stations such as pipes and pipe bends containing surface cracks. The system is being extended to surface cracks in reactor pressure vessel (RPV) nozzle area. A large matrix of varying surface crack sizes in a plate under tension has been analysed and the automatically generated mesh is shown to give good accuracy. Such tests cannot guarantee the same accuracy for general loading conditions and geometries. Methods are being developed for the accuracy assessment of the results and for directing the mesh refinement. Results of a test series with plane models are promising. In the mesh refinement element sub-division was used. The same accuracy assessment approach is applied also to 3D models.

Original languageEnglish
Pages (from-to)271 - 279
Number of pages9
JournalComputers and Structures
Volume40
Issue number2
DOIs
Publication statusPublished - 1991
MoE publication typeA1 Journal article-refereed

Fingerprint

Quality Assurance
Quality assurance
Surface Crack
Finite Element
Cracks
Mesh Refinement
Pipe
Pressure vessels
Nuclear power plants
Nozzles
Nozzle
Subdivision
3D Model
Vessel
Finite Element Model
Reactor
Geometry
Safety
Mesh
Three-dimensional

Cite this

Mikkola, Timo ; Niemi, Hannes. / Quality assurance for fracture mechanical finite element analyses. In: Computers and Structures. 1991 ; Vol. 40, No. 2. pp. 271 - 279.
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Quality assurance for fracture mechanical finite element analyses. / Mikkola, Timo; Niemi, Hannes.

In: Computers and Structures, Vol. 40, No. 2, 1991, p. 271 - 279.

Research output: Contribution to journalArticleScientificpeer-review

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