Indirect strain rate dynamic tensile load testing method applicable to metal materials

A dynamic stretching, metal material technology, applied in the direction of using stable tension/pressure test material strength, electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., can solve the problem of inaccurate dynamic tensile load data and so on

Inactive Publication Date: 2016-06-08
CHINA AIRPLANT STRENGTH RES INST
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  • Abstract
  • Description
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Problems solved by technology

Therefore, in the case of high-speed tension, the dynamic tensile load data of the load sensor test is inaccurate, and it is nec...

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  • Indirect strain rate dynamic tensile load testing method applicable to metal materials
  • Indirect strain rate dynamic tensile load testing method applicable to metal materials
  • Indirect strain rate dynamic tensile load testing method applicable to metal materials

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail b...

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Abstract

The invention discloses an indirect strain rate dynamic tensile load testing method applicable to metal materials. The method comprises steps as follows: Step 1, a test piece is mounted on a high-speed hydraulic servo material tester, wherein strain gauges are pasted in corresponding positions of two sides of a non-test section at the lower part of the test piece; Step 2, a dummy gauge is mounted in the same position, where the strain gauges of the test piece are mounted, of a non-test piece, and the non-test piece and the test piece form a Wheatstone full-bridge circuit; Step 3, a dynamic tensile test is conducted on the test piece; Step 4, parameters of the strain gauges, the Wheatstone full-bridge circuit and the test piece are acquired; Step 5, strain of the non-text section at the lower part of the test piece is acquired; Step 6, the tensile load of the test piece in the dynamic tensile test process is acquired through formula calculation. The method has the advantages that the inertia effect of a static clamping fixture is eliminated and the resonant frequency of a testing system is not coupled into test data.

Description

technical field [0001] The invention relates to the technical field of testing dynamic mechanical properties of materials, in particular to an indirect testing method for strain rate dynamic tensile load applicable to metal materials. Background technique [0002] The mechanical properties of materials are an important performance of engineering materials. Many material properties are very sensitive to strain rate. When the structure is subjected to impact loads such as bird strikes and crashes, the mechanical properties of materials are obviously different from static and quasi-static loading conditions. , therefore, in the impact analysis and design of the structure, the dynamic mechanical performance data of the material is required as the basic input condition. [0003] In different strain rate ranges, the main factors that determine the mechanical properties of materials are often different, which requires different methods for different strain rate ranges to obtain the...

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Application Information

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IPC IPC(8): G01N3/08G01B7/16
CPCG01N3/08G01B7/18
Inventor 白春玉刘小川
Owner CHINA AIRPLANT STRENGTH RES INST
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