A Distributed fiber Optical Sensor (DOS) was embedded inside and attached to the surface of a multi-directional continuous fiber composite laminate coupon, along with the traditional foil of Strain Gages (SG) and Digital Image Correlation (DIC), to compare the DOS measure strain response to traditional strain acquisition methods. Tensile and bending tests were performed on an Open Hole composite laminate coupon to study different modes of loading and the performance of the DOS in the presence of a strain gradient. Tensile test results show good agreement between the SG, the DIC, and the DOS strain measurements in the region far from the strain concentration. Near the hole, the DOS repeatably measured the strain concentration during tensile and bending tests. The DOS was able to measure the residual strain in the composite laminate coupon through the hole-drilling method. Finite Element Analysis was performed to obtain the theoretical distribution of axial strain along the locations corresponding to the physical placement of the DOS in the coupon. As the results indicate, the DOS readings agree well with the theoretical results for the strain distribution in the test coupons. The results obtained during these evaluations provide confidence that the DOS strain measurement method and equipment are a robust strain acquisition option with the capability to overcome some of the limitations of the traditional foil SG and DIC methods.

分布式光纤传感器（DOS）嵌入并附着在多方向连续纤维复合材料层压板的表面，以及传统的应变片（SG）和数字图像相关（DIC）箔，以比较DOS测量对传统应变采集方法的应变响应。在裸眼复合层压板试样上进行了拉伸和弯曲试验，以研究在应变梯度存在下不同的加载方式和DOS的性能。拉伸测试结果表明，在远离应变浓度的区域中，SG，DIC和DOS应变测量值之间具有良好的一致性。在孔附近，DOS在拉伸和弯曲测试期间重复测量应变集中。DOS能够通过钻孔方法测量复合层压板试样中的残余应变。进行了有限元分析，以获得轴向应力沿与DOS在试样中的物理位置相对应的位置的理论分布。结果表明，DOS读数与试样中应变分布的理论结果非常吻合。在这些评估过程中获得的结果使人相信，DOS应变测量方法和设备是一种强大的应变采集选项，能够克服传统箔SG和DIC方法的某些局限性。进行了有限元分析，以获得轴向应力沿与DOS在试样中的物理位置相对应的位置的理论分布。结果表明，DOS读数与试样中应变分布的理论结果非常吻合。在这些评估过程中获得的结果使人相信，DOS应变测量方法和设备是一种强大的应变采集选项，能够克服传统箔SG和DIC方法的某些局限性。进行了有限元分析，以获得沿轴向应变的理论分布，该轴向应变沿着与试样中DOS的物理位置相对应的位置。结果表明，DOS读数与试样中应变分布的理论结果非常吻合。在这些评估过程中获得的结果使人相信，DOS应变测量方法和设备是一种强大的应变采集选项，能够克服传统箔SG和DIC方法的某些局限性。