Fiber-reinforced cementitious matrix (FRCM) composites are usually mechanically characterized by means of tensile and bond tests. The former, in the clevis-grip version, is referred to by the American guidelines ACI 549.4R (2013) to determine the tensile properties of the FRCM composite. The latter, in the single-lap version, is used in the Italian guidelines CNR-DT 215 (2018) to determine the effective strain. The effective strain is the strain at which debonding occurs and therefore composite action is lost. In this paper, the poliparafenilene benzobisoxazole (PBO) fiber–matrix stress transfer law, also known as cohesive material law (CML), is employed in an analytical model that describes clevis-grip tensile tests of PBO-FRCM composites. The CML was previously obtained by the authors from single-lap shear tests. The load responses provided by the model are compared with the results of tensile tests herein presented in addition to selected tests from the literature. The experimental cracking process, tensile strength, and deformation capacity can be accurately predicted by the analytical model. The comparison indicates that the knowledge of the CML of the fiber–matrix interface allows for an accurate prediction of the main tensile properties of the PBO-FRCM coupon.

纤维增强水泥基复合材料（FRCM）通常通过拉伸和粘结试验进行机械表征。根据美国指南ACI 549.4R（2013），采用U型夹形式的前者，以确定FRCM复合材料的拉伸性能。在意大利指南CNR-DT 215（2018）中使用单圈形式的后者来确定有效应变。有效应变是发生剥离并因此失去复合作用的应变。在本文中，poliparafenilene苯并双恶唑（PBO）纤维-基体应力传递定律，也称为内聚材料定律（CML），用于描述PBO-FRCM复合材料的U型夹抓力测试的分析模型。CML以前是由作者通过单圈剪切试验获得的。除从文献中选择的测试外，还将模型提供的载荷响应与本文提供的拉伸测试结果进行比较。通过分析模型可以准确地预测实验的开裂过程，拉伸强度和变形能力。比较表明，纤维-基体界面的CML知识可以准确预测PBO-FRCM试样的主要拉伸性能。