Bending properties of three-dimensional angle interlocking woven reinforced composites with different proportions of warp insertion

3D woven reinforced composites have good structural integrity and mechanical properties. In order to explore the influence of warp insertion on mechanical properties of three-dimensional angle interlocking woven reinforced composites (3DAWCs), 3DAWCs with different proportions of warp insertion were designed and prepared in this paper. The bending properties of 3DAWCs with different proportions of warp insertion were studied in different temperature fields. The ratios of warp insertion to warp are 0∶1, 1∶1 and 2∶1. The testing temperatures include 20°C, 80°C and 150°C. The results show that the warp insertion have a significant effect on 3DAWC’s thickness, shape of yarn, shape of load-deflection curve, bending strength and damage distribution. The thickness and maximum bending load of 3DAWCs increase with the increase of the proportion of warp insertion, but the difference of bending strength between 1∶1 and 2∶1 is minor. The bending properties of the specimen decrease with the increase of temperature. In different temperature fields, the warp and weft bending properties of samples with different warp insertion ratios have different sensitivities to temperature.