test rig crack plane

所申请的机器用于对不同材料制成的试样进行拉伸和压缩加载。这台机器的独特之处在于可以改变试样横截面上施加的载荷量。因此，可以调整所需的裂缝几何形状，并且还可以模拟测试样本中裂缝的移动（例如，在地震载荷下）。根据所需的裂缝宽度参数的主动控制是可能的，并且允许在所需的时间段内冻结裂缝状态并补偿混凝土的徐变效应。这是必不可少的，例如，使用计算机断层扫描的试样和裂纹几何形状的调查。此外，所应用的设备使得能够在交替拉伸和/或交替横向载荷下加载插入件或改型紧固件。控制系统允许在任何时间段内控制具有相关裂纹几何形状的载荷。

The machine applied for is used for tensile and compressive loading of test specimens made of different materials. The unique feature of this machine is the possibility to vary the amount of applied load over the cross-section of the test specimen. Thus, required crack geometries can be adjusted and also the movement of a crack in the test specimen (e.g. under earthquake loading) can be simulated. Active control according to the required crack width parameters is possible and allows to freeze the crack state over required time periods and to compensate for creep effects of the concrete. This is essential, for example, for the investigation of specimens and crack geometry using computed tomography. In addition, the equipment applied for makes it possible to load inserts or retrofitted fasteners under alternating tensile and or alternating transverse loads. The control system allows control of the load with the associated crack geometry over any period of time.