公开(公告)号：US4924708A

公开(公告)日：1990-05-15

申请号：US308291

申请日：1989-02-09

申请人： Harvey D. Solomon ,  William R. Catlin

发明人： Harvey D. Solomon ,  William R. Catlin

IPC分类号： G01B7/16 ,  G01N3/00 ,  G01N3/08 ,  G01N3/32 ,  G01N17/04 ,  G01N27/20 ,  G01N27/26

CPC分类号： G01N27/20 ,  G01N3/08 ,  G01N2203/0066 ,  G01N2203/027

摘要： A method is provided for measuring crack growth in a solid comprising a sensor utilizing potential or voltage drop measurements across a preformed and propagating crack. Preferably the sensor is representative of a structural component and is exposed to an aggressive environment like that in which the structural component operates. Measured voltage values are plotted versus a distance at which the voltages are measured by a plurality of pairs of probes, and intercept values are obtained and used in combination with previously measured crack lengths in calculating subsequent crack lengths of a propagating crack.

公开(公告)号：US5386442A

公开(公告)日：1995-01-31

申请号：US83140

申请日：1993-06-25

申请人： Thomas P. Diaz ,  Peter L. Andresen ,  William R. Catlin ,  Gary W. Contreras ,  Ronald E. De Lair ,  William D. Miller ,  Harvey D. Solomon ,  Daniel Weinstein

发明人： Thomas P. Diaz ,  Peter L. Andresen ,  William R. Catlin ,  Gary W. Contreras ,  Ronald E. De Lair ,  William D. Miller ,  Harvey D. Solomon ,  Daniel Weinstein

IPC分类号： G01L9/14 ,  G01N3/00 ,  G01N3/02 ,  G01N3/06 ,  G01N3/10 ,  G01N3/20 ,  G01N3/32 ,  G01N17/00 ,  G21C17/00 ,  G21C17/003 ,  G21D1/00

CPC分类号： G01N17/00 ,  G01N3/10 ,  G01N3/20 ,  G21C17/00 ,  G01N2203/0066 ,  G01N2203/0232 ,  G01N2203/024 ,  G01N2203/0244 ,  G01N2203/027 ,  G01N2203/0617 ,  G21Y2002/201 ,  G21Y2004/40

摘要： An apparatus and a method for measuring and controlling the crack growth rate within a double cantilever beam type test specimen. The arms of the test specimen are fitted with a pressure-actuated bellows to induce a predetermined load and with a sensing assembly to provide feedback on the amount of beam displacement resulting from application of that load. In this manner a loaded test specimen may be remotely mounted and adjusted inside the reactor pressure vessel or piping of a nuclear reactor in order to maintain a stress intensity which is constant or which varies in a predetermined manner for inducing stress corrosion cracking or corrosion fatigue in the specimen.

摘要翻译： 一种用于测量和控制双悬臂梁型试样中裂纹扩展速率的装置和方法。 测试样本的臂装有压力致动的波纹管以引起预定的负载并且与感测组件一起提供关于由施加该负载导致的光束位移量的反馈。 以这种方式，负载的试样可以在反应堆压力容器或核反应堆的管道内远程安装和调节，以保持应力强度，其为常数或以预定方式变化以引起应力腐蚀开裂或腐蚀疲劳 标本。