利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

450 条记录 (耗时 0.014 秒)

    Fatigue damage indicator
    51.
    发明授权
    Fatigue damage indicator 失效
    疲劳损伤指标

    公开(公告)号：US3979949A

    公开(公告)日：1976-09-14

    申请号：US591915

    申请日：1975-06-30

    申请人： Howard Warren Smith

    发明人： Howard Warren Smith

    IPC分类号： G01B5/30

    CPC分类号： G01B5/30

    摘要： A gage for measuring accumulated fatigue damage, or accumulated strain experience, and remaining fatigue life in a structure subjected to repeated loadings in relation to predictions or calibration tests. The disclosed embodiment has a thin, nominally rectangular metal base of uniform thickness which has a very narrow crack-like slit cut in one side and a teflon parting strip attached to the base underlying the slit. When the gage is attached to a structure with a suitable adhesive and the structure is subjected to repeated loading, a fatigue crack immediately begins at the inner end of the slit and increases in length as an approximately linear function of the accumulative fatigue damage strains incurred by the structure. The crack in the gage occurs in advance of and independently of any crack in the structure itself.

    摘要翻译： 用于测量累积的疲劳损伤或累积应变经验的量规，以及相对于预测或校准测试而遭受重复加载的结构中的剩余疲劳寿命。 所公开的实施例具有均匀厚度的薄的标称矩形的金属基底，其在一侧具有非常窄的裂缝状狭缝切割，并且附着到狭缝下方的基底上的特氟隆分离条。 当将量具连接到具有合适粘合剂的结构并且该结构受到重复加载时，在狭缝的内端处立即开始疲劳裂纹，并且其长度随着累积疲劳损伤应变的近似线性函数而增加， 结构。 量规中的裂纹发生在结构本身的任何裂纹之前和独立之处。

    Gage for measuring the circumferential expansion of internally pressurized tubes
    52.
    发明授权
    Gage for measuring the circumferential expansion of internally pressurized tubes 失效
    用于测量内部加压管的周向膨胀的量具

    公开(公告)号：US3889381A

    公开(公告)日：1975-06-17

    申请号：US45976774

    申请日：1974-04-10

    申请人： US ARMY

    发明人： BROWN BRUCE B

    IPC分类号： G01B5/02 ,  G01B5/30 ,  G01B5/08

    CPC分类号： C21D7/12 ,  G01B5/025 ,  G01B5/30

    摘要： A gage for measuring the circumferential expansion of a tube subjected to internal pressure comprises a chain of roller links between first and second rectangular blocks respectively mounted in slidable engagement with spaced parallel rods projecting from the opposite ends of a fixed reference block. When the gage is wrapped around the circumference of the tube and the first block advanced relative to the second, the initial slack in the chain is taken up. Further movement of the first block toward the reference block will impart simultaneous movement to the second block thereby compressing a pair of springs in abutment therewith in order to insure that the subsequent gaging separation between the first and second blocks will start with the same degree of tautness in the chain regardless of the circumference of the tube. A measuring device is adjustably fixed to the second block and includes a spring-biased slidable plunger protruding therefrom into contact with the end of a micrometer spindle fixed to the reference block. The gage can be easily and accurately calibrated simply by actuating the first block through the same distance as the anticipated circumferential expansion of the tube and periodically comparing the increase in the gap between the second block and the reference block with the readings provided by the measuring device.

    摘要翻译： 用于测量经受内部压力的管的周向膨胀的量具包括分别安装成与固定参考块的相对端突出的间隔开的平行杆滑动接合的第一和第二矩形块之间的链轮链。 当计量管围绕管的圆周缠绕并且第一块相对于第二块延伸时，链中的初始松弛被吸收。 第一块朝向参考块的进一步移动将赋予与第二块同时的移动，从而压缩与其抵接的一对弹簧，以确保第一和第二块之间随后的标定间隔开始于相同程度的绷紧度 在链条中，不管管的周长。 测量装置可调节地固定到第二块，并且包括从其突出的弹簧偏压的可滑动柱塞，其与固定到参考块的微米主轴的端部接触。 可以简单地通过致动第一块与预期的管的周向膨胀相同的距离来容易且精确地校准量规，并且周期性地将第二块和参考块之间的间隙的增加与由测量装置提供的读数进行比较 。

    Grid for strain measurements
    53.
    发明授权
    Grid for strain measurements 失效
    用于应变测量的网格

    公开(公告)号：US3789657A

    公开(公告)日：1974-02-05

    申请号：US3789657D

    申请日：1971-10-27

    申请人： US ARMY

    发明人： CHING L ,  SHAFTER C

    IPC分类号： G01B5/30

    CPC分类号： G01B5/30

    摘要： In stress analysis work a grid system may be affixed to a sheet of metal or other object that undergoes distortion or deformation due to a force being applied thereto. The present grid system of circles and squares (or rectangles) enables easy measurement of maximum and minimum strains and their respective directions and reduces computation time in stress analysis work.

    摘要翻译： 在应力分析工作中，网格系统可以被固定到金属片或其它被施加力的扭曲或变形的物体上。 现有的圆形和正方形（或矩形）网格系统可以轻松测量最大和最小应变及其各自的方向，减少应力分析工作中的计算时间。