Device and method for measuring volume expansion characteristics of material under tensile load
A technology of volume expansion and measuring device, applied in the direction of measuring device, analyzing material, strength characteristics, etc., can solve the problems of inability to accurately determine the time and displacement point of sample stretching, and it is difficult to ensure the volume compensation rod, so as to ensure the measurement Traceability, ensure accuracy, and avoid the effect of gas state changes
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[0030] like figure 1 As shown in the figure, a measuring device for the volume expansion characteristics of materials under tensile load is characterized by comprising a platform 1, which is installed on the base 3 of the tensile testing machine through a support column 2, and a test cavity 4 and a reference cavity 5 are fixed on the platform 1. , the mounting seat 25, the force sensor 8, and the upper fixture 10 are fixed on the top of the test chamber 4 in sequence from top to bottom. The upper end of the tension rod 13 and the lower end of the compensation rod 14 are connected and fixed. The tension rod 13 passes through the test cavity 4 through the tension rod mounting seat 15, and its lower end is connected and fixed with the tensile test motorized beam 16. The displacement sensor 17 on the compensating rod 14 passes through the test cavity 4 through the compensating rod mounting seat 18; the screw micrometer 19 is fixed outside the test cavity 4 through the screw microm...
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