Thermal Response and Warpage Behavior of Silica-Coated Glass Under Cyclic Heating

A thermo-mechanical model was built for silica-coated soda–lime glass (۲ × ۳ × ۰.۳ cm۳) under cyclic thermal loading. One-dimensional transient heat conduction was solved by an explicit finite difference method with asymmetric boundaries: a given temperature on the hot surface and a Robin condition on the coated surface simulating contact resistance and convection. Simulations created unambiguous thermal histories for coating and substrate; the interface temperature varied by just a few kelvins, while the glass mean temperature changed considerably with phase lag. This imbalance caused cyclic edge deflection of around ±۶ µm along ۳ cm, even without exposure to outside load, demonstrating that warpage due to thermal cycling alone is measurable. The deformation continued for excitation periods of ۰.۵–۲ h, with mechanical response mimicking thermal harmonics. Greater interfacial thermal resistance enhanced mismatch but also ensured controllability: changing frequencies of excitation or contact conductance would limit bow. The model therefore provides a predictive model for transient deformation of coated glass, which can be extended to include cover glass and optical laminates, and forms a stepping stone to further thermoelastic plate analyses with realistic material properties.

کلیدواژه ها:

Antisoiling ، Coating ، Dust repulsion ، Glass substrate ، Warpage