Experimental study on effects of structural characteristics of C/E composite laminates on grinding temperature

As for ultrasonic vibration assisted grinding (UVAG) of carbon/epoxy (C/E) composites, the grinding temperature is greatly influenced by their structural characteristics (such as epoxy resin content and fiber directional angle (θ)). For revealing their relationship, C/E composite workpieces with various structural characteristics were designed and prepared; moreover, Fiber Bragg grating (FBG) sensors were embedded in each workpiece for measurement of the grinding temperature; in addition, various grinding parameters were set in UVAG experiments. Experimental results show that: 1). the grinding temperature is influenced very remarkably by the fiber directional angle of C/E composites and the grinding temperature along the direction of fibers is much higher than that reverse fiber direction; 2). the grinding temperature peaks under fiber directional angle (θ=90°); 3). on the premise of meeting the performance of workpieces, the grinding temperature raises with the increase of epoxy resin content; 4). the change of grinding parameters has nothing to do with the relationship (the grinding temperature vs. the structural characteristics of C/E composites).