Ultrahigh-strength steel plate material dynamic performance parameter identification method
A technology of dynamic performance and steel plate materials, which is applied in the direction of using one-time impact force to test the strength of materials, etc., can solve the problems of low precision, high cost, poor repeatability, etc., and achieve the effect of low recognition cost, good repeatability and high recognition accuracy
Inactive Publication Date: 2013-01-16
FUZHOU UNIV
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The dynamic performance test of automotive steel is usually carried out by combining high-speed servo hydraulic tensile test and Hopkinson tension rod test. Both methods have the disadvantages of poor repeatability, low precision and high cost.
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[0011] The method for identifying dynamic performance parameters of ultra-high-strength steel plate materials in the present invention, such as figure 1 shown, including the following steps:
[0012] Step 1: The initial estimated value of the dynamic performance parameters of the given material;
[0013] Step 2: Substituting the values of the material dynamic performance parameters into the numerical simulation model for calculation, solving the numerical simulation results of peak force, average force or energy, and turning to step 3;
[0014] Step 3: Compare the numerical simulation results obtained in step 2 with the test results obtained through the impact test measurement, if the error between the two is greater than the set value, correct the value of the material dynamic performance parameter and return to step 2 for a cycle Calculate until the error between the numerical simulation results and the test results is not greater than the set value, that is, the numerica...
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The invention relates to an ultrahigh-strength steel plate material dynamic performance parameter identification method including the steps: firstly, presetting an initial estimation value of a material dynamic performance parameter; secondly, substituting the value of the material dynamic performance parameter into a numerical simulation model for computation, solving a numerical simulation result of peak force, average force or energy and entering a step 3; and thirdly, comparing the solved numerical simulation result with a test result obtained by shock test measurement, if an error between the numerical simulation result and the test result obtained by shock test measurement is larger than the preset value, correcting the material dynamic performance parameter value and returning to the step 2 for circular computation until the error between the numerical simulation result and the test result is not larger than the preset value, namely the numerical simulation result meets the error requirements, and outputting the material dynamic performance parameter value meeting the requirements. The ultrahigh-strength steel plate material dynamic performance parameter identification method is good in repeatability, high in identification precision, low in identification cost and fine in use effect.
Description
technical field [0001] The invention relates to a method for identifying dynamic performance parameters of ultra-high-strength steel plate materials. Background technique [0002] Under impact loading conditions, the yield limit and strength limit of high-strength steel plate materials are significantly increased, which is caused by the strain rate effect of the material. This dynamic performance of materials has an important impact on the correctness and precision of automobile crash simulation. The dynamic performance test of automotive steel is usually carried out by combining high-speed servo hydraulic tensile test and Hopkinson tension bar test. Both methods have the disadvantages of poor repeatability, low precision and high cost. Contents of the invention [0003] The object of the present invention is to provide a method for identifying dynamic performance parameters of ultra-high-strength steel plate materials. The method not only has good repeatability and high ...
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IPC IPC(8): G01N3/30
Inventor 马宁
Owner FUZHOU UNIV