齿槽增强泡桐木夹层结构界面性能试验

采用在芯材表面开槽并注入树脂的方法,可以有效提高泡桐木夹层结构的玻璃纤维树脂面板与泡桐木芯材之间的黏结性能.为比较齿槽的界面增强效果,使用真空导入工艺制备了多个不同槽宽、槽深及间距的试件,应用双悬臂梁(DCB)方法,测试了夹层梁发生层间断裂时的能量释放率,发现齿槽构造可以显著地提高泡桐木夹层结构的界面性能.同时,分析了影响夹层结构界面性能的关键因素,齿槽的增强作用可体现在工艺和界面构造两方面.

Experimental study on the interface of grooved paulownia wood sandwich composites

To improve the adhesive properties between the faces and the core,some grooves were machined on the surface of the paulownia wood core,and,the resins were fulfilled in the grooves.After curing,the resins left in the grooves strongly bond the face and the core together.Therefore,the adhesive capacity between the faces and the core was enhanced.For comparing the interfacial strengthening approaches,VARIM process was used to manufacture the specimens with different groove widths,depths and distances,and the DC...