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Analysis on the Mechanical Behavior of Flexible Screens
Lirui Niu1, Jun Ding1, Wei Liu2
1School of Mechanical Engineering, Southwest Petroleum University, Chengdu 610500, China.
Materials (Basel, Switzerland)
|April 23, 2022
Summary
Finite element analysis reveals that decreasing the bending radius in flexible organic light-emitting devices (OLEDs) significantly increases stress. Material selection for flexible screens should consider stress redistribution during bending.
Area of Science:
- Materials Science
- Mechanical Engineering
- Physics
Background:
- Flexible organic light-emitting devices (OLEDs) are increasingly popular.
- Analyzing stress and strain in bending OLEDs is complex due to intricate force distribution and deformation.
- Theoretical analysis and direct experiments are insufficient for precise stress-strain evaluation.
Purpose of the Study:
- To perform finite element analysis (FEA) on flexible screen bending models.
- To understand stress and strain behavior under different bending conditions.
- To identify optimal material selection strategies for flexible OLEDs.
Main Methods:
- Finite element analysis (FEA) was employed to model the bending of flexible screens.
- U-shaped and water-drop-shaped bending modes were simulated.
- FEA results were validated using an imaging experiment.
Main Results:
- Maximum Mises stress escalates rapidly as the bending radius diminishes in U-shaped bending.
- Tensile and compression zones undergo redistribution, crucial for selecting layer materials.
- Water-drop-shaped bending analysis aimed to mitigate structural failure risks.
Conclusions:
- FEA provides a viable method for analyzing stress and strain in flexible OLEDs.
- Material selection must account for stress redistribution during bending.
- Investigating novel bending modes like water-drop shape can enhance structural integrity.
