An indentation head, an instrumented measurement system and a method of determining mechanical properties of materials the indentation method

摘要

The instrumented measuring system comprises the indentation head (1) the loading mechanism (2) the table (3) for the sample, the analogue-digital converter (4) and the computer (5). The essence of the indentation head (1) lies in the fact that, inside the housing (6), there is arranged the holder (15) of the sensor (19) of the shift, firmly connected to the housing (6) in which there is slidably mounted the rod (20) of the shift passing to the sensor (19) of the shift arranged in the holder (15) in the axis of the indenter (13). The movable pressing segment (10) in the upper part of the housing (6) is provided with supports passing around the holder (15) and meshing with the central pressing plate (23) arranged slidably in the housing (6) and carrying at least one first dynamometer (25) with deformable the projections (26). These projections (26), through the gap (27), sit on the lower pressing plate (28) arranged slidably in the housing (6) and connected to the holder (12) of the indenter (13), while between the lower pressing plate (28) and the face (7), there is arranged the first resilient element (30), and the central pressing plate (23) and the lower pressing plate (28) are provided with holes for passage of the rod (20) of the shift into the holder (15). The indentation head (1) is formed in two preferred versions for the use with any of the loading mechanisms (2) and for the use without the loading mechanism (2) during manual application. The structure of the indentation head (1) enables precise measurement of the shift of the indenter (13) without deformation influence on the measuring parts, namely with sufficient accuracy in the wide range of loads. The device is resistant, allowing its outdoor use as well as the use for measurement in an aggressive environment.