Fatigue machine for testing cord or filament
    2.
    发明授权
    Fatigue machine for testing cord or filament 失效
    用于测试绳索或长丝的疲劳机

    公开(公告)号:US06550323B1

    公开(公告)日:2003-04-22

    申请号:US09513630

    申请日:2000-02-28

    IPC分类号: G01L504

    摘要: An apparatus for testing the fatigue of a sample of cord or filament (12) by bending it over a fixed surface (19). The apparatus comprises a tensioner (14), a fixed bending surface (19) and a driving mechanism (24), whereby the driving mechanism (24) causes a non-twisting bending of cord or filament (12) over bending surface (19) while tensioner (14) maintains a constant tension on cord or filament (12). In a method of the invention, a cord or filament (12) is attached to a tensioner (14), the cord or filament (12) is mounted on fixed bending surface (19) and attached to non-stationary roller (20), and driving mechanism (24) is activated to cause a back and forth movement of roller (20), thereby causing filament or cord (12) to bend back and forth over fixed bending surface (19) until it breaks. This process is repeated using different stress increase rates on the cord or filament (12) by adjusting the tensioner (14) and a linear regression equation is used to determine the fatigue stress limit of the material.

    摘要翻译: 一种用于通过将绳索或细丝(12)的样品弯曲在固定表面(19)上来测试疲劳的装置。 该装置包括张紧器(14),固定的弯曲表面(19)和驱动机构(24),由此驱动机构(24)引起绳索或细丝(12)在弯曲表面(19)上的非扭曲弯曲, 而张紧器(14)在绳索或细丝(12)上保持恒定的张力。 在本发明的方法中,绳索或细丝(12)附接到张紧器(14)上,绳索或细丝(12)安装在固定的弯曲表面(19)上,并连接到非固定的辊(20)上, 并且驱动机构(24)被启动以引起辊(20)的来回移动,从而使细丝或绳索(12)在固定的弯曲表面(19)上来回弯曲直到其断裂。 通过调节张紧器(14),使用线或丝(12)上的不同应力增加率重复该过程,并且使用线性回归方程来确定材料的疲劳应力极限。