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عنوان فارسی مقاله:
تجزیه و تحلیل اثر قوس الکتریکی ضربه ناشی از نقص شکست یک threadbar پست تنیده
عنوان انگلیسی مقاله:
Effect analysis of an arc-strike-induced defect on the failure of a post-tensioned threadbar
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Previous works have demonstrated that the mechanical properties of pre-stressed steel bars are sensitive to the presence of small (<1 mm) surface defects, such as scratches, cracks or pits, because of a limited material fracture toughness and a necessity to apply a high (0.7 times the ultimate tensile load) stress level [1,2]. This study analyzes the reason why a temporary threaded high-strength bar (UTS > 1000 MPa; Ø = 26.5 mm) used for precast segmental construction broke during the post-tensioning process before reaching 0.7 times the ultimate tensile load. Therefore, a complete characterization of the threadbar was performed, which included fractured bar failure analysis and fracture surface fractographic analysis. Based on the obtained information, a discussion of the results was undertaken.
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کلمات کلیدی:
Arc Strike and "Soundness" - American Welding Society https://app.aws.org/forum/topic_show.pl?tid=34191 Jan 30, 2015 - caused by arc strikes shall be ground to a smooth contour ... Soundness-"free from injury, damage, defect, disease, etc.; in good condition; .... much of a stress riser or residual cracking from the arc strike to induce failure at low ... Effect analysis of an arc-strike-induced defect on the failure of ... https://expertsdefaillances.com/.../effect-analysis-of-an-arc-strike-in... Translate this page Sep 14, 2016 - An article about a case study published in "Case Studies in Engineering Failure Analysis" - april 2016. A temporary threadbar used for precast ... Recent Case Studies in Engineering Failure Analysis Articles - Elsevier https://www.journals.elsevier.com/case-studies-in-engineering-failure.../recent-articles Failure investigation was done on a 321 stainless steel charge heater tube which .... of an arc-strike-induced defect on the failure of a post-tensioned threadbar. Welding defect - Wikipedia https://en.wikipedia.org/wiki/Welding_defect A welding defect is any flaw that compromises the usefulness of a weldment. There is a great ... Arc strike cracking occurs when the arc is struck but the spot is not welded. ... of the base material, and can lead to catastrophic failure through cold cracking. ... It is caused by the poor creep ductility of the heat affected zone. Handbook of Case Histories in Failure Analysis, Volume 2: https://books.google.com/books?isbn=0871704951 Khlefa Alarbe Esaklul - 1993 - Technology & Engineering diam elbow Examination section containing failed weld W-3. ... inclusions in the welds as well as tungsten residue on welding backup rings from arc strikes. ... to try to distinguish original fabrication defects from mercury-induced degradation. What is arc strike? What is the proper corrective action? - Bayt.com ... https://www.bayt.com/en/.../q/.../what-is-arc-strike-what-is-the-proper-corrective-actio... Sep 17, 2013 - So an arc strike occurs most commonly due to an accidental strike by a welder ... metal caused by the misplaced arc being started outside the weld area. ... the arc strike to prevent possible part failure at some time in the future. Searches related to arc-strike-induced defect on the failure arc strike definition arc strike repair procedure arc strike welding definition arc strikes can be removed by grinding arc strikes outside of the weld groove drag angle drag angle definition arc welding defects
