A Calculation Method of Reinforcement Yield Force
A calculation method and yield force technology, which is applied in the calculation field of steel bar yield force, can solve the problems that there is no specific calculation formula for steel bar yield force, the accuracy of yield force cannot be guaranteed, etc., and achieve the goal of removing sawtooth points and clamp tightening process Influence, the effect of accurate calculation results
Active Publication Date: 2018-02-13
INST OF COMPUTING TECH CHINA ACAD OF RAILWAY SCI +1
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[0004] The invention proposes a calculation method for the yield force of steel bars, which solves the defect that the accuracy of the yield force cannot be guaranteed due to the lack of specific calculation formulas for the yield force of steel bars in the prior art
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of 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.
[0031] In order to facilitate and clarify the description of the following examples, some terms are explained before describing the specific embodiments of the present invention in detail, and the following explanations apply to the specification and claims.
[0032] The iIndex, iUpIndex, foffset02, iIndex02, iMaxIndex50, iMaxIndex10, iYieldIndex, m_UpInflexion, m_DownInflexion, lTempforce, lTempSlope, lTempSlopeChange, fTemtp, fTemtpo, fMinTemp, fvalue, and lf...
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The invention provides a rebar yield force computing method. The rebar yield force computing method overcomes the defect that in the prior art, the accuracy of the yield force cannot be guaranteed due to the fact that no specific computing formula of the rebar yield force exists. The method includes the following steps that (1) input parameters are preprocessed, the maximum force, the minimum yield force threshold value, the maximum yield force threshold value, the force value sequence and the displacement sequence are obtained; (2) the yield force is determined through the force value-time sequence; (3) if the returned result of the step (2) is true, the step (5) is executed; if the returned result of the step (2) is false, the next step is executed; (4) the yield force is computed through the force value change rate; (5) the upper yield force and the lower yield force are output. By means of the rebar yield force computing method, the computed result is precise, the influence generated in the tooth point sawing and clamp clamping processes can be removed effectively without an extensometer and a displacement sensor in the test process, and the method is suitable for rebar test of any material.
Description
technical field [0001] The invention relates to a calculation method, in particular to a calculation method for the yield force of steel bars. Background technique [0002] The standard GB / T228.1-2010 (Metallic Tensile Test Part 1: Room Temperature Test Method) gives the definition of the yield strength of the steel bar test, and gives the graphics of four situations, but there is no specific calculation formula. The yield force is equal to the yield strength multiplied by the cross-sectional area of the bar. The calculation methods of yield force on the market are in the hands of various test machine controller manufacturers, the methods are not uniform, the level is uneven, and there is no standard algorithm. The calculation of the yield force is affected by various factors such as the fixture, the measurement and control link of the testing machine, and the theoretical level of the test personnel, especially the influence of the fixture. After the testing machine has ...
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IPC IPC(8): G06F19/00
Inventor 王彤王辉麟徐成伟张德强李亚群王荣波陈中雷白根亮陈长春陈杰王志华韩巍巍安然刘北胜龚翔飞陈宝花
Owner INST OF COMPUTING TECH CHINA ACAD OF RAILWAY SCI