A network-based visco-hyperelastic constitutive model for optically clear adhesives

Zhao，Tiankai1; Cao，Jinrui1; Li，Xin1; Xia，Mingyong2; Xue，Bing2; Yuan，Hongyan1

2022-02-01

10.1016/j.eml.2021.101594

Extreme Mechanics Letters   影响因子和分区

2352-4316

Optically clear adhesives (OCAs) are widely used as bonding materials in display industries. Accurate characterizations on the mechanical behaviors of OCAs are fundamental inputs in bending stress analysis of foldable displays for the optimal design purpose. Yet only a few works have studied the mechanical behaviors of OCAs. No network-based visco-hyperelastic constitutive model has ever been developed or applied to OCAs. In this work, we propose a visco-hyperelastic constitutive model based on the microscopic structure of polymer networks to characterize the mechanical behaviors of OCAs under different loading conditions. The model considers that the OCA consists of crosslinked networks and free chains, both of which are under topological constraints induced by entanglements. The hyperelastic response comes from the crosslinked networks, while the viscoelastic response originates from the free chains. We test the OCAs produced by 3M by loading them to large deformations with different loading rates. Results show that our model can well capture the visco-hyperelastic mechanical behaviors under these conditions. In addition, we program our constitutive model into ABAQUS UMAT and use two case studies to show the application of our model in finite element simulations. (C) 2021 Elsevier Ltd. All rights reserved.

Visco-hyperelasticity Full-network model Entanglement Free chains Optically clear adhesives ABAQUS UMAT

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China (NSFC)[12072143]

Engineering ; Materials Science ; Mechanics

Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics

WOS:000819921400002

ELSEVIER

20220311459537

ABAQUS ; Application programs ; Constitutive models ; Elasticity ; Stress analysis ; Topology

Computer Software, Data Handling and Applications:723 ; Computer Applications:723.5 ; Mathematics:921 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Materials Science:951

2-s2.0-85122620558

Web of Science

1.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong OPPO Mobile Telecommunications Corp.,Ltd.,Dongguan,523860,China

Zhao，Tiankai,Cao，Jinrui,Li，Xin,et al. A network-based visco-hyperelastic constitutive model for optically clear adhesives[J]. Extreme Mechanics Letters,2022,51.

Zhao，Tiankai,Cao，Jinrui,Li，Xin,Xia，Mingyong,Xue，Bing,&Yuan，Hongyan.(2022).A network-based visco-hyperelastic constitutive model for optically clear adhesives.Extreme Mechanics Letters,51.

Zhao，Tiankai,et al."A network-based visco-hyperelastic constitutive model for optically clear adhesives".Extreme Mechanics Letters 51(2022).