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Method for determining loading coaxiality by using vector method

A coaxiality and vector technology, which is applied in the field of calibrating loading coaxiality parameters of axial load testing machines for metal materials, can solve the problem that the loading coaxiality parameters cannot be measured, etc.

Active Publication Date: 2012-07-04
NCS TESTING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is simple, the parameter calculation model is unified and simplified, and it solves the loading coaxiality parameter θ of the testing machine when using thick rectangular and thin rectangular sensor samples. mc and θ sp unfathomable dilemma

Method used

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  • Method for determining loading coaxiality by using vector method
  • Method for determining loading coaxiality by using vector method
  • Method for determining loading coaxiality by using vector method

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Embodiment Construction

[0108] The practice of the present invention employs circular cross-section, thick rectangular cross-section and thin rectangular cross-section sensor coupons of different cross-sectional dimensions. The shape, size and clamping method of the sensor sample shall be the same or approximately the same as the actual application sample. The sensor sample should have a measuring point G on its head or shell 1 (strain gauge G 1 ) mark of the position and direction, so that when the sensor sample is clamped on the testing machine, this mark can be used to determine its orientation.

[0109]The entire strain measurement system consists of a strain gauge measurement system on the sensor sample, an automatic acquisition system for strain signals, a data processing and parameter calculation system, and an automatic control system. From measurement to result parameter calculation, it is completed by a computer and corresponding software. The strain measurement system consists of a resis...

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Abstract

The invention discloses a method for determining loading coaxiality by using a vector method and belongs to the technical field of calibration of testing machines. The method comprises the following steps of: pre-heating a measurement system; clamping a sensor sample at an angle of 0 DEG; performing zero setting on a strain measurement system; applying a series of increment forces to the sensor sample in an elastic range, and automatically acquiring strain data; removing the forces, removing the sensor sample, and re-clamping the sensor sample at an angle of 180 DEG; repeatedly applying the previous series of increment forces, and automatically acquiring or recording the strain data; and processing the data, and computing parameters of the loading coaxiality. The method has the advantage that: all parameters Bcm, PBmc, theta mc, Bsp, PBsp and theta sp of the loading coaxiality of the testing machine can be determined.

Description

technical field [0001] The invention belongs to the technical field of calibrating a testing machine for mechanical properties, and in particular provides a method for measuring loading coaxiality with a vector method, which is suitable for calibrating parameters of the loading coaxiality of an axial load testing machine for metal materials. Background technique [0002] Axial load testing machines, including creep testing machines, endurance testing machines, axial stress fatigue testing machines, axial strain fatigue testing machines, tensile testing machines and compression testing machines, are all important equipment for testing the mechanical properties of materials. Since these testing machines are axially loaded, the axiality of axial loading (loading coaxiality parameters) affects the test results of mechanical properties, especially for creep and durability properties, axial fatigue properties, elastic modulus, Poisson's ratio, Proportional limit, yield strength an...

Claims

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Application Information

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IPC IPC(8): G01N3/62G01B21/24
Inventor 梁新帮高怡斐
Owner NCS TESTING TECH
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