【摘要】 本研究以玻璃纤维增强聚酰胺6(GF/PA6)复合材料试样为研究对象，系统探究熔融沉积成型(FDM)关键工艺参数对其拉伸性能的影响规律。采用商用GF/PA6丝材作为打印原料，首先通过单因素试验初步确定各工艺参数的合理取值范围，随后基于Plackett-Burman(PB)析因试验筛选出关键影响因素。在此基础上，结合Box-Behnken(BBD)设计响应面法(RSM),构建工艺参数与力学性能之间的预测模型，系统分析参数间的交互作用，并对优化结果进行试验验证。结果表明，填充密度、热床温度与层高是显著影响GF/PA6试样抗拉强度的三个关键工艺参数。通过模型预测得出最优工艺参数组合为填充密度60%、热床温度98℃、层高0.25 mm,该条件下预测最佳抗拉强度为90.09 MPa。验证试验结果显示，实测抗拉强度为91.2 MPa,与预测值吻合良好。表明所建立的模型具备较高的可靠性，可为GF/PA6材料的FDM成型工艺优化提供理论依据与实践参考。更多还原

【Abstract】 This study systematically investigated the effects of key process parameters in fused deposition modeling(FDM)on the tensile properties of glass fiber-reinforced polyamide 6(GF/PA6)composite specimens.Using commercial GF/PA6 filament as the printing material, a single-factor test was first conducted to preliminarily determine the reasonable range of process parameters.Subsequently, key influencing factors were identified through a Plackett-Burman(PB)factorial design.Based on this, a predictive model between process parameters and mechanical properties was established by combining the Box-Behnken Design(BBD)with response surface methodology(RSM).The model was used to systematically analyze the interactions among parameters, and the optimization results were experimentally validated.The findings indicate that infill density, heated bed temperature, and layer height are the three key process parameters significantly affecting the tensile strength of GF/PA6 specimens.The optimal combination of process parameters predicted by the model is as follows: infill density of 60%,heated bed temperature of 98 ℃,and layer height of 0.25 mm, under which the predicted maximum tensile strength is 90.09 MPa.Validation test results show that the actual measured tensile strength is 91.2 MPa, which aligns well with the predicted value, demonstrating the high reliability of the established model.This study provided a theoretical basis and practical reference for the optimization of FDM process parameters for GF/PA6 materials.更多还原