| Citation: |
Guozhong Xiu, Bao Shi, Liying Wang. INFLUENCE OF INITIAL RAMP ON CONVOLUTIONAL NONVISCOUS DAMPING MATERIALS[J]. Journal of Applied Analysis & Computation, 2023, 13(4): 2343-2353. doi: 10.11948/20220564
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INFLUENCE OF INITIAL RAMP ON CONVOLUTIONAL NONVISCOUS DAMPING MATERIALS
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Abstract
In this paper, taking the stress relaxation test of viscoelastic material as an example, the viscoelastic materials used in the test are characterized by the convolutional nonviscous damping model. When the kernel function of the convolutional nonviscous damping model is taken as the power exponential function and the exponential function respectively, the influence of the initial ramp on the stress change is proved theoretically and numerically. This will affect the accuracy of parameter determination of fitting the convolutional nonviscous damping model.
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References
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Guozhong Xiu, Bao Shi, Liying Wang. INFLUENCE OF INITIAL RAMP ON CONVOLUTIONAL NONVISCOUS DAMPING MATERIALS[J]. Journal of Applied Analysis & Computation, 2023, 13(4): 2343-2353. doi: 10.11948/20220564
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Figure 1.
Real deformation history during the relaxation test.
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Figure 2.
Change of stress for different value of
$ b_1=0.5 $ $ t_0=0.5,1,2 $ -
Figure 3.
Change of stress for different value of
$ b_1=1 $ $ t_0=0.5,1,2 $ -
Figure 4.
Change of stress for different value of
$ b_1=2 $ $ t_0=0.5,1,2 $ -
Figure 5.
Influences of initial ramps on relaxation experimental test.