Mechanical characterization of gres porcelain and low-velocity impact numerical modeling

• Autor(a) principal: Fragassa, Cristiano
• Data de Publicação: 2018
• Outros Autores: Camargo, Felipe Vannucchi de, Pavlovic, Ana, Silveira, Antonio Carlos de Figueiredo, Minak, Giangiacomo, Bergmann, Carlos Perez
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/182473
• topic: Cerâmica; Elementos finitos; Propriedades mecânicas dos materiais; Ceramic; Annealing; Drop-weight impact; Finite element; LS-DYNA

The current investigation was conducted on gres porcelain stoneware, a robust, impermeable and aesthetically pleasing type of ceramic mainly used for flooring, characterizing its resistance to bending and low-velocity impact, both representative efforts to which flooring tiles are constantly subjected as a consequence of the fall of objects and microsubsidences. The mechanical characterization was made through experimental tests following an adapted low-velocity impact testing routine, and the model was by validated numerical simulation through the explicit code software LS-DYNA based on the Johnson–Holmquist constitutive material model. Specimens were tested before and after an annealing cycle industrially used to allow porcelain folding. The thermal treatment demonstrated to infer a decrease in mechanical resistance on the material, understood as a consequence of its elevated maximum temperature and fast cooling rate. The numerical model calibrated successfully allows predicting the behavior of gres porcelain before and after annealing against low-velocity impact.