Method for forecasting uniaxial constitutive relation of material according to press hardness

A technique of indenting hardness and constitutive relationship, which is applied in the direction of testing material hardness, etc., and can solve problems such as difficulty in direct correspondence, low prediction accuracy, and inability to predict uniaxial constitutive relationship
CN102589995AInactive Publication Date: 2012-07-18SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTHWEST JIAOTONG UNIV
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for forecasting the uniaxial constitutive relation of material according to press hardness, comprising the following steps: in a press hardness detecting system consisting of a press head loading unit, a deformation detecting unit and a data processing unit, the press head loading unit presses material to be detected by press heads with different appearances, and the deformation detecting unit detects the corresponding deformation of the material to be detected and inputs into the data processing unit to obtain the constitutive parameters E, sigma y and n of forecasting material, so that the portable measurement of the uniaxial constitutive relation of the material and the serviced structural part can be realized by the simple method for forecasting the uniaxial constitutive relation of the material according to the press hardness.
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Description

Technical field:

[0001] The invention relates to the performance detection of metal materials, especially the detection field of the uniaxial constitutive relationship of in-service component materials. Background technique:

[0002] Uniaxial stress-strain curve (ie, constitutive relationship), as the most basic mechanical properties of materials, plays an important role in the design and service of engineering components. The usual way to obtain the uniaxial constitutive relationship of materials is to take standard tensile samples from raw materials or engineering components and then conduct tensile tests in the laboratory. However, standard specimens are not allowed to be taken from service engineering components that are subject to damage, aging, etc., which makes the traditional tensile test method unable to be used for uniaxial constitutive relationship measurement of in-service components. On the other hand, for welded structures, the uniaxial constitutive relations ...

Claims

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