圧力技術
Online ISSN : 1347-9598
Print ISSN : 0387-0154
ISSN-L : 0387-0154
検索
詳細検索
OR
閲覧
検索
47 巻, 6 号
選択された号の論文の5件中1～5を表示しています
すべての抄録を表示する
    • |<
    • <
    • 1
    • >
    • >|
論文
  • 熱負荷を受ける中空円筒内壁の応力再配分軌跡
    小林 謙一, 山田 淳一, 中村 協正, 島川 貴司
    原稿種別: 論文
    2009 年 47 巻 6 号 p. 352-360
    発行日: 2009/11/25
    公開日: 2010/02/19
    DOIhttps://doi.org/10.11181/hpi.47.352
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
    The stress redistribution locus (SRL) method has been proposed to provide a reasonable estimate for inelastic behavior employing elastic, elastic-plastic and⁄or elastic-creep FEM analyses. A theoretical and numerical analyses were carried out for a double and a single thick cylinder subjected to thermal transients, and the characteristics of SRL was investigated. When the stepwise temperature is raised inside an inner cylinder of the double thick cylinder model, the normalized equivalent stress-strains almost depict on the proposed SRL curve provided the ratio of the inelastic area to the inner cylinder remains below 30%. However when the temperature variation between both cylinders becomes to be greater, the normalized equivalent stress-strain curve leaves away from the proposed SRL curve. After analyses for the double thick cylinder model, inelastic behavior for the single thick cylinder model under a linear or a quadratic distribution of temperature was evaluated using elastic, elastic-plastic and elastic creep FEM analyses. Most normalized equivalent stress-strain loci draw nearly the same curve, and they are independent of temperature variations ΔT. Furthermore the SRL behavior is a bit depending on the configuration of temperature variation inside the cylinder but there is little influence on material properties and dimensions of cylinder. Thus it is verified that the present SRL procedure could estimate inelastic behaviors, and that its criterion guarantees the robust structural design for complicated components.
    抄録全体を表示
    PDF形式でダウンロード (1075K)
  • 応力腐食割れの下限界応力拡大係数に及ぼす過大予荷重の影響
    高橋 宏治, 宮崎 裕司, 橋倉 靖明, 安藤 柱
    原稿種別: 論文
    2009 年 47 巻 6 号 p. 361-368
    発行日: 2009/11/25
    公開日: 2010/02/19
    DOIhttps://doi.org/10.11181/hpi.47.361
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
    The effects of overload on the threshold stress intensity factor for stress corrosion crack (KISCC) of stainless steel were studied. Tensile overload was applied to a wedge opening loaded (WOL) specimen of SUS316. Then, SCC tests were carried out to determine the resultant KISCC. As a result, the appareut value of KISCC increases as increasing a stress intensity factor by tensile overload (KOV) . The effects of tensile overload on KISCC and the threshold stress intensity factor range for fatigue (ΔKth) were compared. It was found that the effects of tensile overload on KISCC were larger than that on ΔKth.
    抄録全体を表示
    PDF形式でダウンロード (1052K)
  • FRP複合容器用一方向炭素繊維強化複合材の静的引張特性
    山田 敏弘, 竹花 立美, 福富 洋志
    原稿種別: 論文
    2009 年 47 巻 6 号 p. 369-377
    発行日: 2009/11/25
    公開日: 2010/02/19
    DOIhttps://doi.org/10.11181/hpi.47.369
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
    The stress rupture and tensile strength of unidirectional CFRP (T700SC⁄Epoxy) have been investigated experimentally. The stress rupture data revealed that (1) the difference of the maximum rupture time and the minimum rupture time in the same test load condition is more than 40, 000 hours, (2) the relationship of the test load condition and rupture time is unclear, and (3) origin of failure as stress corrosion does not exist on the surface of carbon fiber after the test. These results imply that CFRP is less susceptible to stress rupture. The tensile strength data revealed that the tensile strength in CFRP can be obtained on the basis use of the weakest link model. The method of calculation of the expectation burst pressure of the CFRP composite vessel in consideration of the length dependency of CFRP has been proposed.
    抄録全体を表示
    PDF形式でダウンロード (679K)
解説
報告
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top