• Title/Summary/Keyword: 반원형 노치

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Three-Dimensional Virtual Crack Closure Technique Based on Anisoparametric Model for Stress Intensity Factors of Patch Repaired Plates with Cracks at Notches (접착 보강된 노치 균열판의 응력확대계수 산정을 위한 비등매개변수 모델 기반의 3차원 가상균열닫힘법)

  • Ahn, Jae-Seok;Woo, Kwang-Sung
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.32 no.1A
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    • pp.39-48
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    • 2012
  • This study deals with numerical determination of stress intensity factors of adhesively patch-repaired plates with cracks at V-shaped or semicircular notches. The p-convergent anisoparametric model are considered and then three-dimensional virtual crack closure technique is presented using formulations of anisoparametric elements. In assumed displacement fields of an element, strain-displacement relations and three-dimensional constitutive equations are derived with three-dimensional hierarchical shape functions expanded from one-dimensional Lobatto functions. Transfinite mapping technique is used to represent a circular boundary. The present model provides accuracy and simplicity in terms of stress concentration factor, stress distribution, the number of degrees of freedom, and non-dimensional stress intensity factor as compared with previous works in literatures. Stress intensity factors obtained by the three-dimensional virtual crack closure technique are estimated with respect to the variation of width of finite plate, radius of notch root, angular inclination of V-shaped notch, and crack length.

Development of a Phalaenopsis (P. Blume) Cultivar, 'Yellow Cream' with Striped Yellow Flower (황화 스트라이프 대륜계 호접란 신품종 '옐로우 크림' 육성)

  • Been, Chul-Gu;Kim, Jin-Ki;Kim, Soo-Kyeong;Noh, Chi-Wong
    • FLOWER RESEARCH JOURNAL
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    • v.19 no.3
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    • pp.177-180
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    • 2011
  • A cultivar 'Yellow Cream' of Phalaenopsis(P. Blume) was developed by cross breeding and line selection at the Flower Research Institute, Gyeongnam ARES, from 2000 to 2008. Characteristic trials for this cultivar were carried out three times from 2006 to 2008. 'Yellow Cream' was developed from a crossing between P. 'Sogo Firework' and P. 'Sogo Gold'. 'Yellow Cream' exhibits light yellow flower color with pink stripe and favorable flower shape. Individual flowers are formed with parallel arrangement and have long life with more than 55 days. 'Yellow Cream'(Grant No.3232) was registered to the Korea seed and variety Service(KSVS) for commercialization in 2010 and suitable for the cultivation under greenhouse conditions in Korea.