Method for constructing mechanical property main curve of viscoelastic material
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
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
View PDF3 Cites 14 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
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...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more