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    • 6. 发明公开
    • 수소 가스 중 피로 시험 방법
    • 氢气中的疲劳试验方法
    • KR1020100066497A
    • 2010-06-17
    • KR1020107005177
    • 2009-01-09
    • 고쿠리츠켄큐카이하츠호진 상교기쥬츠 소고켄큐쇼
    • 마츠오카사부로무라카미유키타카카네자키토시히코
    • G01N17/00G01N19/00G01N3/32G01N3/34
    • G01N3/34G01N2203/0066G01N2203/0242G01N2203/027
    • Provided is a fatigue testing method capable of confirming crack progressing situations on a plurality of repetition rates by a single test. In the case of a repetition rate of f= 0.01 Hz of Condition 1, the influences for hydrogen to exert on a fatigue progress are more serious than the case of a repetition rate of f= 1 Hz of Condition 2. As a result, the area of the more serious influences of hydrogen (i.e., the area developed at the repetition rate of f) and the area of the less serious influences of hydrogen (i.e., the area developed at the repetition rate of f) appear alternately on the fatigue fracture, and a boundary line can be visually confirmed, because the two areas have different fracture modalities. Thus, the crack lengths having progressed under the individual conditions can be individually specified so that the fatigue crack progressing curves on the individual conditions can be acquired.
    • 提供了能够通过单次测试来确认多个重复率的裂纹进展情况的疲劳试验方法。 在条件1的f = 0.01Hz的重复率的情况下,与条件2的f = 1Hz的重复率相比,氢对疲劳进行的影响更严重。结果, 氢的较严重影响区域(即以f的重复频率发展的区域)和氢的影响较小的区域(即以重复率f发展的区域)在疲劳断裂上交替出现 ,因为两个区域具有不同的断裂形态,所以可以目视确认边界线。 因此,可以单独规定在各个条件下进行的裂纹长度,从而可以获得各种条件下的疲劳裂纹进行曲线。
    • 7. 发明公开
    • 고압 탱크의 손상 검지 방법 및 이를 위한 장치
    • 高压罐损坏检测方法及其设备
    • KR1020100041696A
    • 2010-04-22
    • KR1020097017152
    • 2008-07-11
    • 고쿠리츠켄큐카이하츠호진 상교기쥬츠 소고켄큐쇼
    • 무라카미유키타카야마베준이치로
    • G01N29/14G01N29/04G01B17/04
    • G01N29/14G01N29/043G01N29/227G01N2291/106G01N2291/2695
    • A high-pressure tank damage detecting method for detecting a sign of breakage of a high-pressure tank containing a high-pressure fluid in a nondestructive way at an early stage, and an apparatus for the method are provided. By means of an acoustic emission sensor (AE sensor) (1), a sign of breakage caused when a high-pressure tank (2) is filled with a fluid is detected in a nondestructive away. One AE signal detected by the AE sensor (1) is counted as one hit. The hit rate representing a variation with time of the hits is determined, and a sign of breakage is detected from the variation of the hit rate. When a micro-crack in the high-pressure tank (2) progresses or when micro-cracks join and form one macro-crack, the hit rate of the AE signal does not increase with an increase of the internal pressure of the high-pressure tank (2) and comes into a saturated state. The saturated state of the hit rate is judged as a sign of breakage.
    • 提供了一种用于早期以非破坏性方式检测含有高压流体的高压罐的断裂符号的高压罐损坏检测方法和该方法的装置。 通过声发射传感器(AE传感器)(1),在非破坏性地检测到高压罐(2)填充有流体时引起的断裂符号。 由AE传感器(1)检测到的一个AE信号被计数为一次。 确定表示与命中时间的变化的命中率,并根据命中率的变化检测出破损的符号。 当高压罐(2)中的微裂纹发展或微裂纹结合形成一个宏观裂纹时,AE信号的命中率不随着高压内压的增加而增加 罐(2)并进入饱和状态。 命中率的饱和状态被判断为破坏的迹象。