Young modulus testing method considering damping influence

Abstract

The invention relates to the technical field of material mechanics, in particular to a Young modulus testing method considering damping influence, which comprises the following steps: S1, acquiring a target experimental sample; s2, building a test device; s3, setting test parameters; s4, testing to obtain data, and analyzing and processing the data; s5, verifying a result; the Young modulus testing method considering the damping influence is accurate, efficient, wide in adaptability and easy and convenient to operate, and has wide application prospects and important practical value.

Description

Technical Field

[0001] The present invention relates to the technical field of material mechanics, and in particular to a Young's modulus testing method taking damping effects into consideration. Background Art

[0002] In the field of materials science and engineering, Young's modulus, as a key indicator to measure the material's ability to resist elastic deformation, is of great significance for predicting and optimizing material properties. However, traditional Young's modulus test methods, such as static tensile method and bending method, often ignore the damping effect of the material during actual use. Damping refers to the energy loss caused by internal energy dissipation mechanisms (such as intermolecular friction, dislocation movement, etc.) when a material is subjected to external force. This energy loss will significantly affect the vibration response of the material, thereby causing deviations in the measurement results of Young's modulus.

[0003] With the continuous advancement of science and technology, dynamic mechanical analyzer (DMA) has gradually become an important tool for studying the viscoelastic properties of materials. By applying periodic excitation force and measuring the response of the sample, DMA can simultaneously obtain parameters such as the storage modulus (E'), loss modulus (E") and damping factor (tanδ) of the material. These parameters can not only reflect the elastic properties of the material, but also reveal the damping mechanism inside the material.

[0004] In order to more accurately evaluate the mechanical properties of materials, researchers began to try to incorporate damping factors into the test method of Young's modulus. They used DMA to test materials at different frequencies and temperatures to observe the influence of damping on Young's modulus. By comparing and analyzing the test results under different conditions, the researchers found that damping does have a significant effect on Young's modulus, and this effect changes with frequency and temperature.

[0005] However, the current research on the Young's modulus test method considering the damping effect is still in its infancy. Although advanced equipment such as DMA provides strong support for research, it is still a challenge to accurately extract damping information and incorporate it into the calculation model of Young's modulus. In addition, the damping mechanism of different materials may be different, so in-depth research and exploration of specific materials is needed.

[0006] In summary, developing a more advanced and comprehensive Young's modulus test method that takes into account the influence of damping is of great significance for accurately evaluating the mechanical properties of materials. This will help promote the development of materials science and provide more reliable data support for the design and application of new materials. Summary of the invention

[0007] In view of this, the present invention aims at the deficiencies of the prior art and proposes a Young's modulus testing method taking the damping effect into consideration, aiming to solve at least one of the problems raised in the above background technology.

[0008] The present invention provides a Young's modulus testing method considering the influence of damping, comprising the following steps:

[0009] S1. Obtain target experimental samples;

[0010] S2, build the test device;

[0011] S3, set test parameters;

[0012] S4, test and obtain data and analyze and process it;

[0013] S5. Verify the results.

[0014] In some embodiments, step S1 includes measuring the size of the experimental sample.

[0015] In some embodiments, the step S1 further includes cleaning and drying the experimental sample.

[0016] In some embodiments, the testing device in step S2 is a dynamic mechanical analyzer, and the Young's modulus and damping performance of the experimental sample are measured by the dynamic mechanical analyzer.

[0017] In some embodiments, the dynamic mechanical analyzer is tested while in use to ensure the stability and sensitivity of the dynamic mechanical analyzer.

[0018] In some embodiments, the test parameters set in step S3 include a test frequency range, a temperature range, and a strain amplitude.

[0019] In some embodiments, setting the test parameters in step S3 further includes performing the test using a cantilever beam resonance method.

[0020] In some embodiments, step S4 includes fixing the experimental sample on a testing device, applying a periodic excitation force, and recording the vibration response parameters of the experimental sample under excitation, and calculating the Young's modulus and damping coefficient of the material by analyzing the vibration response data.

[0021] In some embodiments, step S4 also includes performing in-depth analysis of the test data through the TRIOS software platform, correcting and interpreting the test results through theoretical models or empirical formulas, and comparing the test results at different frequencies and temperatures to analyze the influence of damping on Young's modulus.

[0022] In some embodiments, step S5 includes verifying the accuracy and reliability of the test method by comparing the test results with other known standard experimental samples.

[0023] Compared with the prior art, the beneficial effect of the present invention is that the present application can more accurately measure the Young's modulus of the material by considering the damping effect. Traditional methods often ignore the damping effect of the material during actual use, resulting in a large difference between the test results and the actual application situation. The present application can more realistically reflect the mechanical behavior of the material when subjected to external force by introducing the damping factor, thereby improving the accuracy of the test results; the present application is applicable to a variety of materials and test conditions, and can comprehensively evaluate the mechanical properties of the material at different frequencies and temperatures. Different materials have different damping characteristics, and these characteristics may change with changes in frequency and temperature. The present application can adapt to the needs of different materials and test conditions by setting appropriate test parameters and modes, thereby obtaining more comprehensive test results. The test steps of the present application are clear and easy to implement. The applicant only needs to build the test device, set the test parameters, conduct the test and analyze and process the data according to the steps. This simple operation method not only reduces the difficulty of the test, but also improves the test efficiency, so that more researchers can easily master and apply the method. The test results of the present application can be widely used in materials science, engineering design, quality control and other fields. In materials science, this application can be used to study the viscoelastic properties and damping mechanisms of materials; in engineering design, this application can be used to optimize structural design and improve product performance; in quality control, this application can be used to detect the quality and consistency of materials. In addition, this application can also provide strong data support for the research and development of new materials and promote the development of materials science.

[0024] The foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0025] Other features and aspects of the present disclosure will become more apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A flow chart of a Young's modulus testing method taking damping effects into consideration provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] As mentioned in the background technology, with the continuous advancement of science and technology, dynamic mechanical analyzer (DMA) has gradually become an important tool for studying the viscoelastic properties of materials. DMA can simultaneously obtain parameters such as the storage modulus (E'), loss modulus (E"), and damping factor (tanδ) of the material by applying periodic excitation force and measuring the response of the sample. These parameters can not only reflect the elastic properties of the material, but also reveal the damping mechanism inside the material.

[0033] In order to more accurately evaluate the mechanical properties of materials, researchers began to try to incorporate damping factors into the test method of Young's modulus. They used DMA to test materials at different frequencies and temperatures to observe the influence of damping on Young's modulus. By comparing and analyzing the test results under different conditions, the researchers found that damping does have a significant effect on Young's modulus, and this effect changes with frequency and temperature.

[0034] However, the current research on the Young's modulus test method considering the damping effect is still in its infancy. Although advanced equipment such as DMA provides strong support for research, it is still a challenge to accurately extract damping information and incorporate it into the calculation model of Young's modulus. In addition, the damping mechanism of different materials may be different, so in-depth research and exploration of specific materials is needed.

[0035] In order to improve the above problems, the present application proposes a Young's modulus test method considering the damping effect. By considering the damping effect, the present application can more accurately measure the Young's modulus of the material. Traditional methods often ignore the damping effect of the material during actual use, resulting in a large difference between the test results and the actual application. By introducing the damping factor, the present application can more realistically reflect the mechanical behavior of the material when subjected to external force, thereby improving the accuracy of the test results; the present application is applicable to a variety of materials and test conditions, and can comprehensively evaluate the mechanical properties of the material at different frequencies and temperatures. Different materials have different damping characteristics, and these characteristics may change with changes in frequency and temperature. By setting appropriate test parameters and modes, the present application can adapt to the needs of different materials and test conditions, thereby obtaining more comprehensive test results. The test steps of the present application are clear and easy to implement. The applicant only needs to follow the steps to build the test device, set the test parameters, conduct the test, and analyze and process the data. This simple operation method not only reduces the difficulty of the test, but also improves the test efficiency, allowing more researchers to easily master and apply the method. The test results of the present application can be widely used in materials science, engineering design, quality control and other fields. In materials science, this application can be used to study the viscoelastic properties and damping mechanisms of materials; in engineering design, this application can be used to optimize structural design and improve product performance; in quality control, this application can be used to detect the quality and consistency of materials. In addition, this application can also provide strong data support for the research and development of new materials and promote the development of materials science.

[0036] See also Figure 1 As shown, a Young's modulus testing method considering the damping effect according to an embodiment of the present application includes the following steps:

[0037] S1. Obtain target experimental samples;

[0038] S2, build the test device;

[0039] S3, set test parameters;

[0040] S4, test and obtain data and analyze and process it;

[0041] S5. Verify the results.

[0042] Specifically, it is necessary to select a suitable experimental sample. This sample should be a typical representative of the material to be tested, and its size, shape and surface treatment should meet the experimental requirements to ensure the accuracy and repeatability of the test results; according to the selected test method, the corresponding test device is built. For example, if it is a static Young's modulus measurement, it may be necessary to build a system that can apply a known load and measure the displacement; if it is a dynamic test, it may be necessary to have a system that can excite the sample to vibrate and measure its response. Before starting the test, it is necessary to set appropriate test parameters, such as loading rate, preload force, temperature, etc. These parameters are crucial to ensure the accuracy and reliability of the test. Perform the actual test operation and collect the necessary data. Then, the collected data is analyzed using appropriate data processing methods to calculate the Young's modulus. If the influence of damping is considered, specific data analysis techniques are required to separate the influence of damping effects on modulus measurement. In order to ensure the validity of the test results, result verification is usually required. This includes repeating the experiment using different test methods or comparing with known standard or literature values. Young's modulus can also be predicted by theoretical calculation and compared with experimental results. This Young's modulus test method that takes into account the influence of damping can effectively evaluate the elastic properties of materials through precise control of experimental conditions and meticulous data analysis, providing an important reference for engineering design and material selection.

[0043] In some specific embodiments, the step S1 includes measuring the size of the experimental sample.

[0044] Specifically, accurate dimensional data is the basis for calculating Young's modulus. By accurately measuring the length, width and thickness of the sample, it can be ensured that the data used in the subsequent stress and strain calculations are accurate, thereby improving the accuracy of the final Young's modulus value. In material mechanics testing, inaccurate sample dimensions will introduce additional errors. By carefully measuring the dimensions, this source of error can be minimized, making the test results more reliable. When comparing the Young's modulus of different materials or under different conditions, standardized sample dimensions can ensure the consistency of the data, making the comparison results more scientific and reasonable. According to the size of the sample, the experimental device can be better designed and adjusted to ensure that the sample can be uniformly stressed when it is stressed, avoiding stress concentration or instability, which is crucial to obtaining accurate Young's modulus values. Accurate sample size helps to perform correct stress-strain analysis in the data processing stage. For example, when drawing a stress-strain curve, the cross-sectional area of ​​the sample needs to be known to calculate the stress, and the calculation of the cross-sectional area depends on the size of the sample.

[0045] In some specific embodiments, the step S1 further includes cleaning and drying the experimental sample.

[0046] Specifically, a clean and dry sample surface ensures that the test results will not be affected by surface impurities or moisture during the test. For example, oil, dust or other contaminants on the surface may change the friction characteristics of the material surface, thereby affecting the transfer and distribution of stress. Impurities or moisture on the sample surface may cause local stress concentration or instability. Clean and dry treatment can reduce these potential sources of error and make the test results more reliable. Clean and dry samples ensure that the conditions of each test are as consistent as possible, thereby improving the repeatability of the data. This is essential for data analysis in scientific research and engineering applications. Dry samples can avoid changes in material properties caused by changes in humidity, especially in materials that are sensitive to humidity. Clean samples can also avoid additional friction during loading, which can affect the test results. Clean and dry sample surfaces are easier to observe, which helps to check whether the sample is damaged or deformed before and after the test, and also facilitates microstructural analysis under a microscope.

[0047] In some specific embodiments, the testing device in step S2 is a dynamic mechanical analyzer, and the Young's modulus and damping performance of the experimental sample are measured by the dynamic mechanical analyzer.

[0048] Specifically, DMA can simultaneously measure the elastic properties (such as Young's modulus) and viscous properties (such as damping) of materials, providing comprehensive performance data for the research and application of materials science. DMA technology is extremely sensitive to detecting tiny changes in materials and can accurately measure the response of materials under different temperature, frequency or stress conditions, which is crucial for studying the internal structure and molecular motion of materials. DMA is applicable to various types of materials, including polymers, metals, ceramics, composites, etc., making it an indispensable tool in materials research and industrial applications. The Young's modulus and damping performance data obtained through DMA measurements can provide in-depth understanding of the viscoelastic behavior of materials, such as glass transition, crystallization process, cross-linking reaction, etc. This information is crucial for material design and processing.

[0049] In some specific embodiments, the dynamic mechanical analyzer is tested when in use to ensure the stability and sensitivity of the dynamic mechanical analyzer.

[0050] Specifically, ensuring the stability and sensitivity of the DMA can significantly improve the reliability of test data. Stable instruments can reduce errors caused by fluctuations in equipment performance, resulting in more accurate and consistent test results. A well-calibrated and maintained DMA can provide highly consistent test results at different time points, which is critical for data analysis in scientific research and industrial applications. A highly sensitive DMA can detect small changes in material properties, which is very important for evaluating subtle differences in materials or studying the behavior of materials under specific conditions. By accurately measuring the performance of materials under different conditions, researchers can gain a deeper understanding of the internal structure and molecular mechanisms of materials and promote the development of materials science.

[0051] In some specific embodiments, the test parameters set in step S3 include a test frequency range, a temperature range, and a strain amplitude.

[0052] Specifically, by setting different test frequency ranges, the performance of materials under different use conditions can be simulated, such as low frequency corresponding to creep behavior under long-term load, and high frequency corresponding to behavior under impact or rapid deformation. Setting a wide temperature range can reveal the viscoelastic behavior of materials at different temperatures, which is crucial for studying the thermal stability and thermal sensitivity of materials. The setting of strain amplitude allows researchers to accurately control the stress applied to the sample, thereby obtaining performance data about the material under specific stress conditions. By adjusting the test parameters, different processing conditions can be simulated to help optimize the formulation and production process of the material to improve its performance. Reasonable setting of the test parameters of the dynamic mechanical analyzer, including the test frequency range, temperature range, and strain amplitude, is a key step to ensure the accuracy, reliability, and validity of the test results. This not only helps data collection and analysis in scientific research and industrial applications, but also promotes the development and application of new materials. Therefore, before using DMA for Young's modulus and damping performance testing, sufficient attention should be paid and appropriate measures should be taken to ensure the reasonable setting of test parameters.

[0053] In some specific embodiments, setting the test parameters in step S3 further includes performing the test using a cantilever beam resonance method.

[0054] In some specific embodiments, step S4 includes fixing the experimental sample on a testing device, applying a periodic excitation force, and recording the vibration response parameters of the experimental sample under excitation, and calculating the Young's modulus and damping coefficient of the material by analyzing the vibration response data.

[0055] Specifically, DMA can be tested over a wide frequency range, from low frequency to high frequency, which helps to fully understand the dynamic mechanical properties of materials. By testing at different temperatures, the change law of material properties with temperature can be studied, which is crucial for the study of thermal stability and thermal sensitivity of materials. Testing experimental samples through DMA and analyzing their vibration response data to calculate the Young's modulus and damping coefficient of the material is a key step to ensure the accuracy, reliability and validity of the test results. This not only helps in data collection and analysis in scientific research and industrial applications, but also promotes the development and application of new materials. Therefore, before using DMA for Young's modulus and damping performance testing, sufficient attention should be paid and appropriate measures should be taken to ensure the smooth progress of the test.

[0056] In some specific embodiments, step S4 also includes performing in-depth analysis of the test data through the TRIOS software platform, correcting and interpreting the test results through theoretical models or empirical formulas, and comparing the test results at different frequencies and temperatures to analyze the influence of damping on Young's modulus.

[0057] In some specific embodiments, step S5 includes verifying the accuracy and reliability of the test method by comparing the test results with those of other known standard experimental samples.

[0058] Specifically, the TRIOS software platform can be used to conduct in-depth analysis of the large amount of data generated by DMA testing, including advanced data processing techniques such as time-temperature superposition and frequency-temperature superposition, so as to more comprehensively understand the viscoelastic behavior of materials. Correcting and interpreting the test results through theoretical models or empirical formulas can improve the reliability of the data and ensure that the test results can truly reflect the performance of the material. Analyzing the influence of damping on Young's modulus helps to understand the performance changes of materials under different conditions and provide a scientific basis for the selection and application of materials. By comparing the test results with other known standard experimental samples, the accuracy of the test methods and equipment used can be verified to ensure the validity of the test results. DMA allows users to customize test procedures according to specific research needs, and reasonable test parameter settings can ensure the accuracy and validity of these customized tests. In-depth analysis of test data through the TRIOS software platform, comparison of test results at different frequencies and temperatures, and verification of the accuracy and reliability of the test method by comparing the test results with other known standard experimental samples are key steps to ensure the accuracy, reliability and validity of test results. This not only helps data collection and analysis in scientific research and industrial applications, but also promotes the development and application of new materials. Therefore, before using DMA to test Young's modulus and damping performance, sufficient attention should be paid and appropriate measures should be taken to ensure the smooth progress of the test.

[0059] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A Young's modulus test method considering the influence of damping, characterized in that: The following steps are involved: S1. Obtain target experimental samples; S2, build the test device; S3, set test parameters; S4, test and obtain data and analyze and process it; S5. Verify the results.

2. A Young's modulus testing method considering damping effect according to claim 1, characterized in that: The step S1 includes measuring the size of the experimental sample.

3. A Young's modulus testing method considering damping effect according to claim 2, characterized in that: The step S1 also includes cleaning and drying the experimental samples.

4. A Young's modulus testing method considering damping effect according to claim 1, characterized in that: The testing device in step S2 is a dynamic mechanical analyzer, and the Young's modulus and damping performance of the experimental sample are measured by the dynamic mechanical analyzer.

5. A Young's modulus testing method considering damping effect according to claim 4, characterized in that: The dynamic mechanical analyzer is tested when in use to ensure the stability and sensitivity of the dynamic mechanical analyzer.

6. A Young's modulus testing method considering damping effect according to claim 1, characterized in that: The test parameters set in step S3 include the test frequency range, temperature range and strain amplitude.

7. A Young's modulus testing method considering damping effect according to claim 6, characterized in that: Setting the test parameters in step S3 also includes using a cantilever beam resonance method to perform the test.

8. A Young's modulus testing method considering damping effect according to claim 1, characterized in that: The step S4 includes fixing the experimental sample on the test device, applying a periodic excitation force, and recording the vibration response parameters of the experimental sample under the excitation, and calculating the Young's modulus and damping coefficient of the material by analyzing the vibration response data.

9. A Young's modulus testing method considering damping effect according to claim 8, characterized in that: The step S4 also includes conducting an in-depth analysis of the test data through the TRIOS software platform, correcting and interpreting the test results through theoretical models or empirical formulas, and comparing the test results at different frequencies and temperatures to analyze the influence of damping on Young's modulus.

10. A Young's modulus testing method considering damping effect according to claim 1, characterized in that: The step S5 includes verifying the accuracy and reliability of the test method by comparing the test results with those of other known standard experimental samples.

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