Large deformation tensile testing system

• US 9,404,821 B2
• Filed: 03/31/2012
• Issued: 08/02/2016
• Est. Priority Date: 03/31/2012
• Status: Active Grant

• Current Assignee: China University of Mining and Technology
• Original Assignee: China University of Mining and Technology
• Inventors: He, Manchao, Yang, Xiaojie, Zhang, Yi
• Primary Examiner(s): Noori, Max
• Application Number:
  US14/388,959
• Publication Number:
  US 20150059489A1
• Time in Patent Office: 1,585 Days
• Field of Search: 737/60, 738/28
• US Class Current: 1/1
• CPC Class Codes: G01L 5/08 using fluid means G01L5/042, G01L5/045 take precedence
• CPC Class Codes: G01M 5/0058 of elongated objects, e.g. pipes, masts, towers or railways
• CPC Class Codes: G01N 2203/028 One dimensional, e.g. filaments, wires, ropes or cables
• CPC Class Codes: G01N 3/08 by applying steady tensile or compressive forces G01N3/28 takes precedence
• CPC Class Codes: G01N 3/10 generated by pneumatic or hydraulic pressure G01N3/18 takes precedence

Abstract

A large deformation tensile testing system, for use in testing a large deformation tensile of an anchor rod or an anchor rode, comprising a main machine frame (1), a rear collet component (2) arranged at a first position on the longitudinal direction of the main machine frame (1), a front collet component (3) movably arranged at a second position on the longitudinal direction of the main machine frame (1), a telescoping apparatus (4), a measurement and control apparatus, where a sensor module thereof senses the displacement and real-time tensile of the telescoping apparatus to form real-time data to be transmitted to an analysis module and a control module, the control module that controls, on the basis of a set measurement and control scheme and of an input of the sensor module, a testing process to proceed according to a set testing condition, the analysis module for analyzing the input of the sensor module to form a test result, and an output module for outputting same. The large deformation tensile testing system is capable of deriving a statics parameter of the anchor rod or anchor rode being tested.

Claims

1. A large deformation tensile testing system, for use in testing a large deformation tensile of an anchor shank or an anchor rope, wherein the large deformation tensile testing system comprises:

a main frame;

a rear collet component arranged at a first position in a longitudinal direction of the main frame;

a front collet component movably arranged at a second position in the longitudinal direction of the main frame;

a telescoping apparatus arranged near one end of the main frame, connected to the front collet component, and configured to stretch a sample clamped between the rear collet component and the front collet component according to a set control scheme; and

a measurement and control apparatus including a sensor module, a control module, an analysis module, and an output module, wherein the sensor module is connected to the telescoping apparatus, senses a real-time displacement of the telescoping apparatus and a real-time tensile of the telescoping apparatus to the sample, forms real-time displacement data and real-time tensile data, and transmits the data to the analysis module and the control module;

the control module is configured to control a testing process to be performed under set testing conditions, according to a set control scheme and an input from the sensor module;

the analysis module is configured to analyze an input from the sensor module, and form and transmit a test result to the output module; and

the output module outputs the test result,

wherein the telescoping apparatus stretches the sample thought a piston cylinder; and

clamps for clamping the sample between the front collet component and the rear collet component are hydraulic clamps, and

wherein the main frame includes two grooved longitudinal girders being arranged in parallel and having U-shaped cross sections, wherein U-shaped openings of the two grooved longitudinal girders are opposite to each other;

the telescoping apparatus includes a connecting carriage, a pair of screw rods, and the piston cylinder, wherein the pair of screw rods are connected between the front collet component and a connecting plate of the connecting carriage, a cylinder body of the piston cylinder is fixedly connected to one end of the main frame, and a piston rod of the piston cylinder is connected to the connecting plate and extended away from the main frame.

2. The large deformation tensile testing system according to claim 1, wherein the measurement and control apparatus further includes a console provided with control buttons and a display screen for displaying the test result.

3. The large deformation tensile testing system according to claim 1, wherein the sensor module includes a large deformation extensometer for measuring deformation and a guyed encoder for measuring the displacement of the piston cylinder.

4. The large deformation tensile testing system according to claim 1, wherein each of the rear collet component and the front collet component includes a plurality of sets of clamps for adapting different samples.

5. The large deformation tensile testing system according to claim 1, wherein a first stay plate is arranged at a rear end surface of the piston cylinder;

a second stay plate is arranged at a front end surface of the front collet component; and

the sample can be placed between the first stay plate and the second stay plate for compression test.

6. The large deformation tensile testing system according to claim 1, wherein each of an upper flange and a lower flange of the grooved longitudinal girder is evenly provided with a plurality of through holes for fixing the rear collet component.

7. The large deformation tensile testing system according to claim 6, wherein rotary wheels are arranged at bottom ends of the connecting carriage;

and rails for rolling of the roller are arranged in parallel to the longitudinal direction of the main frame.

8. The large deformation tensile testing system according to claim 1, wherein a safety net is arranged to cover the main frame from above.