OBJECTIVE A costly advantageous approach in composites development process is to limit experimental tests by predicting mechanical properties with respect to their filler ratio. Models exist for other fields than dentistry. They have been compared to 3-point bending test experimental results for yield stress, flexural modulus and flexural strength. METHODS Five formulations of the same experimental material were made. They were composed of an organic matrix and different ratios of silanated barium glass particles. The samples were stored in distilled water for 24h at 37°C prior to the 3-point bending test. The Turcsányi model for yield stress was notably investigated, and SEM was used to complete data analysis. RESULTS The yield stress showed reproducible results and a good fit with Turcsányi model with respect to filler ratio. The flexural modulus data are not scattered but did not fit with the existing models. No trend could emerge for flexural strength and strain because of scattering; these properties are more unpredictable. The SEM observations of fracture areas confirm a good matrix-filler interface quality. SIGNIFICANCE SEM pictures validated the numerical parameter obtained from Turcsányi model. The latter therefore seems to be applicable to dental composites. Firstly, it enables to predict the evolution of the material yield stress without testing all filler ratios. Secondly, this model provides a good way to get micro-information on the matrix-filler interface from macroscopic tests. The discrepancy between flexural modulus results and theory highlighted the necessity to include an "interface quality" parameter in accurate predictive models.

中文翻译：

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基于填料体积比的牙科复合材料屈服应力和弯曲模量的理论预测。

目的在复合材料开发过程中，一种成本高昂的有利方法是通过预测相对于其填充比的机械性能来限制实验测试。除了牙科以外，还存在其他领域的模型。将它们与三点弯曲试验的屈服应力，弯曲模量和弯曲强度的实验结果进行了比较。方法采用相同的实验材料制成五种配方。它们由有机基质和不同比例的硅烷化钡玻璃颗粒组成。在进行三点弯曲试验之前，将样品在37°C的蒸馏水中保存24小时。特别是研究了Turcsányi屈服应力模型，并使用SEM进行了完整的数据分析。结果屈服应力显示出可重复的结果，并且在填充比方面与Turcsányi模型非常吻合。弯曲模量数据没有散布，但与现有模型不符。由于散射，弯曲强度和应变不会出现趋势。这些属性更加不可预测。断口的SEM观察证实了良好的基体-填料界面质量。有意义的SEM图片验证了从Turcsányi模型获得的数值参数。因此后者似乎适用于牙科复合材料。首先，它可以预测材料屈服应力的演变，而无需测试所有填充率。其次，该模型提供了一种从宏观测试中获取基质-填料界面上的微信息的好方法。弯曲模量结果与理论之间的差异突出表明了在准确的预测模型中必须包含“界面质量”参数的必要性。