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Method for constructing mechanical property main curve of viscoelastic material

A technology of viscoelastic material and elastic material, which is applied in the field of accelerated characterization of mechanical properties of viscoelastic material, and achieves the effect of simple and easy method.

Active Publication Date: 2013-05-15
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problem of subjective judgment in the construction of the main curve by manual displacement, and the problem that the existing automatic displacement numerical method must be fitted or interpolated to construct the main curve, the present invention provides a simple, feasible and more accurate method for constructing viscoelastic material mechanics Performance Master Curve Method

Method used

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  • Method for constructing mechanical property main curve of viscoelastic material
  • Method for constructing mechanical property main curve of viscoelastic material
  • Method for constructing mechanical property main curve of viscoelastic material

Examples

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Embodiment 1

[0050] A method for constructing a master curve of mechanical properties of a viscoelastic material, which is used to construct a master curve of storage modulus of carbon black-filled rubber. There are 5 test curves in this embodiment, such as figure 2 As shown, none of the curves contain peaks.

[0051] Step 1. With the frequency f as the abscissa and the storage modulus E' as the ordinate, arrange the curves according to the test temperature from high to low as L 1 , L 2 , L 3 , L 4 and L 5 .

[0052] Step 2 converts the data of all curves into logarithmic data. After this step, the data obtained are shown in Table 1.

[0053] Each curve parameter and data of table 1 embodiment 1

[0054]

[0055] Step 3 calculates the displacement factors of the two adjacent curves respectively, and among the two adjacent curves, the former is the reference curve of the latter. It can be seen from Table 1 that the curve L 1 The modulus interval is [0.98, 1.0913], L 2 The modu...

Embodiment 2

[0061] A method for constructing a master curve of the mechanical properties of a viscoelastic material, which is used to construct a master curve of loss modulus of carbon black-filled rubber. There are 5 test curves in this embodiment, such as image 3 As shown, one of the curves contains a peak.

[0062] Step 1. With the frequency f as the abscissa and the loss modulus E" as the ordinate, arrange the curves according to the test temperature from high to low as L 1 , L 2 , L 3 , L 4 and L 5 .

[0063] Step 2 converts the data of all curves into logarithmic data. After this step, the data obtained are shown in Table 2. Among them, L4 is the curve including the peak value.

[0064] Each curve parameter and data of table 2 embodiment 2

[0065]

[0066]

[0067] In step 3, the shift factors of the two adjacent curves are respectively calculated to obtain D=[0, 0.8809, 1.0830, 1.5101, 1.5921].

[0068] Step 4 calculates each curve relative to L 1 The shift factor...

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Abstract

The invention discloses a method for constructing a mechanical property main curve of a viscoelastic material, which comprises the following steps: 1) performing a mechanical property test on the viscoelastic material to obtain a series of test curves; 2) arranging according to ascending order or descending order of the test temperature and converting all the curve data to logarithm data; 3) calculating shift factors of adjacent curves, when the shift factor is calculated, an area of overlapping areas of two curves is considered, the area of the overlapping areas as zero is taken as a criteria to obtain the shift factor; 4) calculating the shift factor of each curve relative to the assignment reference curve, and shifting the relative curve to construct a main curve; and 5) if the test curve contains peak value curve, performing decomposition on peak value curve, calculating new shift factor, and correcting the constructed main curve. According to the invention, the shift factor can be directly calculated according to test data, and the calculating formula is very simple, the constructed main curve is unique and definite, and the subjective uncertainty of a hand-operated shift mode and necessary fitting or interpolation by a current automatic shift method can be avoided.

Description

technical field [0001] The invention relates to accelerated characterization of mechanical properties of viscoelastic materials, in particular to a method for constructing a master curve of mechanical properties of viscoelastic materials. technical background [0002] Viscoelastic materials are a class of materials with time-dependent mechanical properties. It is well known that the time-temperature equivalent principle (time-temperature principle) can be used to accelerate the characterization of the long-term mechanical properties of viscoelastic materials. Based on the time-temperature principle, for some viscoelastic materials, a series of creep compliance or relaxation modulus test curves at different temperatures can be shifted along the logarithmic time axis to construct the master curve at a certain reference temperature. The time span of the main curve will be extended to several or even tens of orders of magnitude of the test duration. The time-temperature princi...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01N3/56
Inventor 罗文波刘秀
Owner XIANGTAN UNIV
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