RT Journal Article
SR Electronic
A1 Wang, Xianewei
A1 Xu, Wenlong
A1 Yu, Hailong
A1 Li, Chenyang
A1 Zhao, Haikuo
A1 Feng, Yihang
A1 Fang, Caiqi
A1 Zhang, Heng
A1 Xu, Aihua
A1 Xie, Wentao
A1 Li, Xiulian
T1 Study on Thermo-Structural Coupling Mechanism and Multi-Field Evolution Law during the Firing Process of Ceramic Slabs
JF Manufacturing Technology Journal
YR 2026
VO 26
IS 1
SP 106
OP 116
DO 10.21062/mft.2026.012
UL https://journalmt.com/artkey/mft-202601-0012.php
AB To address cracking and deformation in large-size ceramic slabs during firing induced by thermo-structural coupling, this study established an indirect thermo-structural coupling finite element model in Ansys to analyze an 820 mm×100 mm×6.32 mm slab. The evolution of temperature field, stress field, and deformation was investigated across four firing stages. Results indicate that the rapid cooling stage, with a high convective heat transfer coefficient, forms the cycle's maximum thermal gradient, showing the most asymmetric temperature field of mid-plane high, surfaces low and a ~17°C surface-mid-plane temperature difference. The stress field follows a low-high-declining-stable trend, peaking in rapid cooling of 23 MPa maximum equivalent stress in the thickness section and 11 MPa maximum principal stress at the glaze-body interface. Thermal gradient, glaze-body CTE mismatch, and boundary constraints respectively drive stress generation, interface concentration, and asymmetric distribution. Deformation obeys length > width > thickness in rapid cooling, lengthwise deformation is 8.2 times the width. Thickness-direction drum-shaped deformation stems from glaze-body CTE mismatch. This study reveals the firing thermo-structural coupling mechanism, providing theoretical support for optimizing firing processes and glaze-body formulations, with significant engineering value for reducing cracking and improving dimensional stability.