Numerical models verification of cracked tubular T, Y and K-joints under combined loads
This paper summarizes the key steps involved in the construction of an accurate and consistent finite element model for general cracked tubular T, Y and K-joints. The joint under consideration contains a surface crack which can be of any length and located at any position along the bracechord int...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/103293 http://hdl.handle.net/10220/19178 |
| _version_ | 1826119365136744448 |
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| author | Lee, Chi King Lie, Seng Tjhen Chiew, Sing Ping Shao, Yongbo |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Lee, Chi King Lie, Seng Tjhen Chiew, Sing Ping Shao, Yongbo |
| author_sort | Lee, Chi King |
| collection | NTU |
| description | This paper summarizes the key steps involved in the construction of an accurate and consistent
finite element model for general cracked tubular T, Y and K-joints. The joint under consideration
contains a surface crack which can be of any length and located at any position along the bracechord
intersection. Welding details along the brace-chord intersection, compatible with the
American Welding Society (AWS) specifications (2000), are included in the geometrical model. In
order to develop a systematic and consistent modelling procedure, the whole process is divided into
four key steps. They are, namely, (1) construction of a consistent geometrical model of the joint
with welding details, (2) determination of cracked surface to define the semi-elliptical surface crack
profile, (3) generation of well-graded finite element meshes, and (4) stress intensity factor studies
around the crack front. To produce a well-graded finite element mesh, a sub-zone technique is used
in the mesh generation whereby the entire structure is divided into several sub-zones with each zone
consisting of different types of elements and mesh densities. The stress intensity factors (SIFs) are
evaluated using the standard J-integral method. Two full-scale T and K-joint specimens were tested
to failure under axial load (AX), in-plane bending (IPB), and out-of-plane bending (OPB). In the
tests, the rate of crack propagation was monitored carefully using the alternating current potential
drop (ACPD) technique. Using the known material parameters C and m , the experimental SIFs
were obtained, and they are found to be in complete agreement with the computed SIFs obtained
from the generated models. Hence, the proposed finite element models are both efficient and
reliable. |
| first_indexed | 2024-10-01T04:58:46Z |
| format | Journal Article |
| id | ntu-10356/103293 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:58:46Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1032932020-03-07T11:45:54Z Numerical models verification of cracked tubular T, Y and K-joints under combined loads Lee, Chi King Lie, Seng Tjhen Chiew, Sing Ping Shao, Yongbo School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Structures and design This paper summarizes the key steps involved in the construction of an accurate and consistent finite element model for general cracked tubular T, Y and K-joints. The joint under consideration contains a surface crack which can be of any length and located at any position along the bracechord intersection. Welding details along the brace-chord intersection, compatible with the American Welding Society (AWS) specifications (2000), are included in the geometrical model. In order to develop a systematic and consistent modelling procedure, the whole process is divided into four key steps. They are, namely, (1) construction of a consistent geometrical model of the joint with welding details, (2) determination of cracked surface to define the semi-elliptical surface crack profile, (3) generation of well-graded finite element meshes, and (4) stress intensity factor studies around the crack front. To produce a well-graded finite element mesh, a sub-zone technique is used in the mesh generation whereby the entire structure is divided into several sub-zones with each zone consisting of different types of elements and mesh densities. The stress intensity factors (SIFs) are evaluated using the standard J-integral method. Two full-scale T and K-joint specimens were tested to failure under axial load (AX), in-plane bending (IPB), and out-of-plane bending (OPB). In the tests, the rate of crack propagation was monitored carefully using the alternating current potential drop (ACPD) technique. Using the known material parameters C and m , the experimental SIFs were obtained, and they are found to be in complete agreement with the computed SIFs obtained from the generated models. Hence, the proposed finite element models are both efficient and reliable. Accepted version 2014-04-09T05:09:36Z 2019-12-06T21:09:15Z 2014-04-09T05:09:36Z 2019-12-06T21:09:15Z 2004 2004 Journal Article Lee, C. K., Lie, S. T., Chiew, S. P., & Shao, Y. (2004). Numerical models verification of cracked tubular T, Y and K-joints under combined loads. Engineering Fracture Mechanics, 72(7), 983-1009. 0013-7944 https://hdl.handle.net/10356/103293 http://hdl.handle.net/10220/19178 10.1016/j.engfracmech.2004.07.006 en Engineering fracture mechanics © 2004 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Engineering Fracture Mechanics,Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [Article DOI: http://dx.doi.org/10.1016/j.engfracmech.2004.07.006]. 41 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Structures and design Lee, Chi King Lie, Seng Tjhen Chiew, Sing Ping Shao, Yongbo Numerical models verification of cracked tubular T, Y and K-joints under combined loads |
| title | Numerical models verification of cracked tubular T, Y and K-joints under combined loads |
| title_full | Numerical models verification of cracked tubular T, Y and K-joints under combined loads |
| title_fullStr | Numerical models verification of cracked tubular T, Y and K-joints under combined loads |
| title_full_unstemmed | Numerical models verification of cracked tubular T, Y and K-joints under combined loads |
| title_short | Numerical models verification of cracked tubular T, Y and K-joints under combined loads |
| title_sort | numerical models verification of cracked tubular t y and k joints under combined loads |
| topic | DRNTU::Engineering::Civil engineering::Structures and design |
| url | https://hdl.handle.net/10356/103293 http://hdl.handle.net/10220/19178 |
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