Dynamics behavior of flat glass panels under impact conditions: Experiments and numerical modeling

Abstract

-Response of brittle plate-like structures such as glass panels to impact loads has been the subject of many research studies. Different compositions of glass are used in wide variety of applications in daily life. Of interest in this study are the glass panels that are used in consumer electronics devices such as mobile phones, tablets, and televisions that help to protect the displays from every day wear and tear. Therefore, the requirement of this glass to resist scratches, drop impacts, and bumps from everyday use leads to the importance of investigation of the glass response under dynamic impact loading. Ball drop test is a widely accepted test for impact reliability in the industry. The test specifies the impact energy threshold as a qualification and prediction metric. Use of energy as the key parameter in impact testing is limited, because it does not account for the time spent in contact during the impact event. This study attempts to establish a reliable metric for impact testing based on a momentum change. The deformation and the strain of the glass will be obtained by the digital image correlation system, while the rebound velocity will be measured with the high-speed cameras. The global and local measurements are conducted to verify the accuracy of the experimental results. Finite element analysis is conducted using ABAQUS to provide a comprehensive understanding of the dynamic response of the glass. Constitutive relationship for a tape, a hyperelastic material, is developed in this study. Good correlation in deflection time history is obtained between the measurements and predictions.Keywords -strengthened cover glass, ball drop, digital image correlation, finite element analysis.

P‐53: A Study on Conceptual Design in Foam Tape of Curved Display using Topology Optimization

“…In particular, market demands for curved design require higher adhesion performance for the assembly of panel and bottom chassis [3][4]. Foam tapes are adhesive materials widely used for attachment between the display panel and the bottom chassis because they show excellent rework and impact resistance performance [5][6]. The overview for the assembly of curved display for bezel-less design is shown in figure 1.…”