Micro-cutting tests:a new way to measure the fracture toughness and yield stress of polymeric nanocomposites
The fracture toughness,Gc,of pure epoxy and epoxy nanocomposites with 10 wt% nano-rubber and 10 wt% nano-silica particles,was determined using an orthogonal cutting method on a CNC machine.The cutting forces were measured by a multi-axis dynamometer,and depths of cut were precisely controlled from 30 μm to 120 μm.High speed cutting tools with three rake angles of 10o,20o,and 30o were used for the cutting.The fracture results of pure epoxy and 10 wt% nano-silica epoxy composite determined by the cutting test has the same order of magnitude as which determined by the standard compact tension test.However,for 10 wt% nano-rubber epoxy,a much lower Gc value was measured due to the interaction between the plastic zone size of the crack tip and the magnitude of cutting depth.The results have indicated that orthogonal cutting could be an alternative approach to traditional LEFM testing for brittle polymeric nanocomposites.The specimen preparation and testing procedures would be greatly simplified compared with current fracture test technologies.
Orthogonal cutting fracture toughness polymer nanocomposites
Hongjian Wang Li Chang Lin Ye Gordon. J. Williams
Aero,Mechanical and Mechatronics Engineering Department,University of Sydney,Sydney,Australia Aero,Mechanical and Mechatronics Engineering Department,University of Sydney,Sydney,Australia;Mechan
国际会议
北京
英文
1-6
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）