ISO 17138:2014描述了在室温下三点或四点弯曲条件下，测定连续纤维增强陶瓷基复合材料弯曲强度的方法。该方法适用于具有连续纤维增强、单向（1D）、双向（2D）和具有（2<；x）的三向xD的所有陶瓷基复合材料≤ 3） 如CEN/TR 13233所定义，沿着钢筋的一条主轴加载。

ISO 17138:2014 describes a method for the determination of the flexural strength of ceramic matrix composite materials with continuous fibre reinforcement, under three-point or four-point bend at room temperature. This method applies to all ceramic matrix composites with a continuous fibre reinforcement, unidirectional (1D), bidirectional (2D), and tridirectional xD with (2 < x ≤ 3) as defined in CEN/TR 13233, loaded along one principal axis of reinforcement.