Volume 24, Issue 5 (May 2024)
Modares Mechanical Engineering 2024, 24(5): 329-339 |
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Haddadi E, Eshaghi Oskui A. Calibration of Constitutive Models for Pressure-Sensitive Adhesives Based on Experimental Data. Modares Mechanical Engineering 2024; 24 (5) :329-339
URL: http://mme.modares.ac.ir/article-15-76135-en.html
URL: http://mme.modares.ac.ir/article-15-76135-en.html
1- Technical and Vocational University (TVU) , ehadadi@tvu.ac.ir
2- Postdoctoral researcher, Department of Mechanics and Aerospace Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
2- Postdoctoral researcher, Department of Mechanics and Aerospace Engineering, College of Engineering, Southern University of Science and Technology, Shenzhen, China
Abstract: (1028 Views)
Linear viscoelastic constitutive laws, such as hyperelasticity with the Prony series, are commonly used in commercial software to simulate polymer materials. However, these models are not accurate regarding large strain problems despite performing well for small strain problems. To gather experimental data for soft adhesives, various shear modes were employed, including monotonic, creep, and low-cycle tests using single-lap shear specimens. These tests were conducted on optically clear adhesives (OCAs). Initially, the validity range for linear viscoelasticity was established, revealing the inability to predict large strains accurately using this approach. Subsequently, the three-network viscoplastic (TNV) model parameters were calibrated experimentally under large strains. The calibration procedures took advantage of variations in loading modes, enhancing the precision and improving the accuracy of the constitutive models. For calibration purposes, it is recommended to utilize the low-cycle loading-unloading test as it offers a suitable and cost-effective means of precision. This approach provides a cost-effective way to accurately predict material behavior, owing to the variations in loading modes. Finally, the characteristic model was used to evaluate the results through the finite element method. The results showed that the proposed model accurately predicts stress values, energy dissipation, and energy loss due to softening
Article Type: Original Research |
Subject:
Elasticity
Received: 2024/07/17 | Accepted: 2024/08/18 | Published: 2024/04/29
Received: 2024/07/17 | Accepted: 2024/08/18 | Published: 2024/04/29
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