Material mechanics performance unified representation method based on chemical reaction
A technology of chemical reaction and material mechanics, applied in the field of unified characterization of material mechanical properties based on chemical reaction, can solve problems such as inaccuracy and separation from engineering practice, and achieve the effect of broadening the scope of application
Inactive Publication Date: 2019-10-25
NO 719 RES INST CHINA SHIPBUILDING IND
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[0003] In view of this, the present invention provides a unified characterization method for the mechanical properties of materials based on chemical reactions. By establishing a material elastic model based on chemical reactions for inversion and fitting, a parameter set that characterizes the comprehensive mechanical properties of materials is obtained for predicting the use of The static stiffness, dynamic stiffness, creep, damping and other mechanical properties of complex structural parts made of polymer materials solve the inconsistencies in separate tests and predictions caused by the intertwining of various mechanical properties of complex non-metallic structures in engineering applications Accurate and out-of-engineering issues
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[0080] A standard cylindrical sample of a material has a diameter of 21 mm and a height of 25 mm. On a mechanical testing machine, it is compressed and loaded to 3 mm at a rate of 1 mm / min, held for 6 seconds, and then loaded 50 times with an amplitude of 250 N and a frequency of 0.5 Hz. image 3 The stress-strain test curves are shown.
[0081] The material elastic constitutive model based on chemical reaction of the present invention is used to establish a constitutive model for the material. In the model, the elastic item that does not change with time is considered, and two chemical reaction items that change with time are defined. After the genetic algorithm is used in the program to optimize the fitting, the performance of the parameter set characterizing the material is obtained as follows:
[0082] Elastic term that does not change over time: E 1 =110MPa;
[0083] Chemical Reaction Item 1: E t1 =20MPa; N (1) =0.5;R (1) = 1;
[0084] Chemical Reaction Item 2: E t...
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The invention discloses a material mechanics performance unified representation method based on chemical reaction, and belongs to the technical field of the material mechanics performance detection. The method comprises the following realization steps: firstly measuring a size parameter of a sample; and then acquiring force-displacement-time curve data of the sample by utilizing a static-dynamic comprehensive test; secondly, inputting the test process parameter into a material elastic constitutive model based on the chemical reaction, and importing the force-displacement-time curve data into the material elastic constitutive model based on the chemical reaction, and finally automatically fitting various parameters in the constitutive model through an optimization algorithm. Multiple static-dynamic mechanics performances of the material and the structure are explained through a unified model, and the problem that the test and prediction are inaccurate and break away from the engineeringactuality since multiple mechanics performances of the complex non-metallic structure in the engineering application are intertwined can be solved; the application range of the nonmetallic material in the engineering is broadened, and the method lays technical foundation for the application of the mechanics metamaterial technology.
Description
technical field [0001] The invention belongs to the technical field of material mechanical performance detection, and in particular relates to a chemical reaction-based unified characterization method for material mechanical performance. Background technique [0002] Mechanical properties are one of the main factors considered in material applications. After long-term study and catching up with foreign countries, my country's scientific and technological level has accumulated to the present, and it has also ushered in a new era of technological innovation and development, and various innovative products continue to emerge. With the in-depth application and integration of new era technologies such as simulation design technology, computer technology, and 3D printing technology, more and more complex structures appear in innovative products, and the types of materials used are also becoming more and more abundant. When the material used is not simple linear elasticity or hype...
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IPC IPC(8): G01N3/08G01N33/00
CPCG01N3/08G01N33/00
Inventor 游卓黎焕敏张满弓张安付蔡琛何鹏胡旭赵爱国吴涛赵志高张昊钱家昌肖国林王磊陈虹
Owner NO 719 RES INST CHINA SHIPBUILDING IND