Optimization of BFRP-Carbon Fiber Anchor Preparation Process Via RSM: Mechanical Property Enhancement
摘要
Basalt fiber anchor rods were fabricated via the pultrusion-winding process, with basalt fiber-reinforced polymer bars (BFRP bars) and high-performance resins serving as the raw materials. Given the challenges encountered in the practical application of basalt fiber anchor rods, the response surface methodology (RSM) was adopted to optimize their preparation process. Specifically, this study focused on exploring how key process parameters—including the volume ratio of basalt fiber to carbon fiber, winding speed, and calendering pressure—influence the tensile and shear strengths of the anchor rods. It was observed that the incorporation of carbon fiber during the optimization process exerted a significant impact on the performance of basalt fiber anchors. The optimal process conditions were determined as follows: a 10% volume ratio of basalt fiber to carbon fiber, a winding speed of 14 r·min-1, and a calendering pressure of 0.2 MPa. Under these conditions, the tensile strength of the basalt fiber anchors reached 801 MPa, with the shear strength measuring 203 MPa. Additionally, the internal structure of the anchors optimized by RSM was found to be more homogeneous, leading to a notable improvement in their mechanical properties.