复合材料舰船T型板板接头的转角半径尺寸和喷砂处理工艺对其破坏强度的影响

EFFECT OF ANGULAR RADIUS SIZE AND SANDBLASTING PROCESS ON FAILURE STRENGTH OF T-SHAPED PLATE JOINTS OF COMPOSITE SHIPS

复合材料构件间的T型板板接头在舰船结构中广泛使用,它是舰船结构力学性能的薄弱部位。通过实验研究了结构尺寸和制作工艺对接头破坏强度和变形的影响。T接头转角半径值增大,接头破坏强度提高,当半径值超过R50 mm时破坏强度开始下降。经喷砂处理,试样的破坏载荷是不经喷砂处理试样破坏载荷的2.1倍,位移值为2.16倍。喷砂工艺的压力和喷射时间参数提高,接头的破坏强度提高,当空气压力达到0.6 MPa,喷射时间为100 s以后,破坏强度提高缓慢。

T-plate joints of composite components are widely used in naval structures,which are the weak parts of the mechanical properties of naval structures.The effects of structure size and manufacturing process on the failure strength and deformation of joints were studied experimentally.The failure strength of T-joint increases with the increase of the turning radius,and decreases when the radius exceeds R50 mm.The failure load and displacement of sandblasted specimens are 2.1 and 2.16 times higher than those of non-sandblasted specimens.When the air pressure reaches 0.6 MPa and the injection time is 100 s,the failure strength increases slowly.