Experimental correlation between bending crack evolution and load-drop criterion in tight-radius three-point bending test with GPa-grade steels
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jeong, Kyucheol | - |
dc.contributor.author | Jeong, Yuhyeong | - |
dc.contributor.author | Lee, Jaewook | - |
dc.contributor.author | Chung, Giseok | - |
dc.contributor.author | Kim, Geun-ho | - |
dc.contributor.author | Yoon, Jonghun | - |
dc.date.accessioned | 2024-07-10T07:30:23Z | - |
dc.date.available | 2024-07-10T07:30:23Z | - |
dc.date.issued | 2024-09 | - |
dc.identifier.issn | 0020-7683 | - |
dc.identifier.issn | 1879-2146 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/119851 | - |
dc.description.abstract | Determining the bending-fracture limit, also referred to as local formability, is crucial for sheet metal forming. However, this is limited by existing methods such as the VDA-238-100 standard due to limitations in its failure criterion based on the punch load. This study addresses this limitation by proposing a quantitative crack-based failure criterion and investigating its relationship to the load-drop point. Along with surface and cross-sectional optical analyses, an integrated line-scanning system for the VDA-238 test is developed, and advanced high-strength steel (AHSS) grades are analysed with yield strengths ranging from 980 to 1500 MPa in both the rolling and transverse directions. The results showed that, while the load-drop point marks a rapid shift in the crack-propagation direction, the true onset of crack initiation occurs earlier, with different patterns for each AHSS and direction. For all the AHSS and directions tested, a crack depth exceeding 1 % of the sheet thickness occurs at 90 % of the switch-off stroke in the VDA-238 test, suggesting an empirical tendency toward microcrack growth for a more accurate evaluation of the local formability based on early cracks. © 2024 | - |
dc.format.extent | 21 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | Elsevier Ltd | - |
dc.title | Experimental correlation between bending crack evolution and load-drop criterion in tight-radius three-point bending test with GPa-grade steels | - |
dc.type | Article | - |
dc.publisher.location | 영국 | - |
dc.identifier.doi | 10.1016/j.ijsolstr.2024.112949 | - |
dc.identifier.scopusid | 2-s2.0-85197086457 | - |
dc.identifier.wosid | 001287912700001 | - |
dc.identifier.bibliographicCitation | International Journal of Solids and Structures, v.301, pp 1 - 21 | - |
dc.citation.title | International Journal of Solids and Structures | - |
dc.citation.volume | 301 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 21 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Mechanics | - |
dc.relation.journalWebOfScienceCategory | Mechanics | - |
dc.subject.keywordPlus | HIGH-STRENGTH STEELS | - |
dc.subject.keywordPlus | DUCTILE FRACTURE | - |
dc.subject.keywordPlus | BENDABILITY | - |
dc.subject.keywordPlus | STRAIN | - |
dc.subject.keywordAuthor | Bending failure | - |
dc.subject.keywordAuthor | Forming limit | - |
dc.subject.keywordAuthor | Local formability | - |
dc.subject.keywordAuthor | Plane-strain failure | - |
dc.subject.keywordAuthor | Three-point-bending test | - |
dc.subject.keywordAuthor | VDA-238-100 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0020768324003081?via%3Dihub | - |
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