复合材料线烧蚀率计算模型实验研究
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摘要
通过对碳纤维增强S–157酚醛树脂复合材料进行氧–乙炔烧蚀试验,得到了烧蚀试验中的重要表征参数即线烧蚀率,并利用多元线性回归方法,拟合得到线烧蚀率(D)与热流密度(q)和烧蚀时间(t)两个主要影响因素的数学模型,即D=0.612q0.0512 t0.0242–1。经检验,该回归模型适用性较好,预测精度较高,为复合材料线烧蚀率的评估建立了快速、有效、可靠的试验方法。
The important characteristic parameter,namely the linear erosion rate,was obtained by the research on S–157 PF/CF composite under oxyacetylene flame test conditions. By using multiple linear regression,the mathematic model between the linear erosion rate(D),the two major factors,namely the heat flux density(q) and ablation time(t) is as follows :D = 0.612q0.0512 t0.0242 –1. Being verified,the regression model is very applicable and the forecast accuracy is good. So the erosion properties of PF/CF composite can be evaluated with this rapid,effective and accurate method in the oxyacetylene flame test.
The important characteristic parameter,namely the linear erosion rate,was obtained by the research on S–157 PF/CF composite under oxyacetylene flame test conditions. By using multiple linear regression,the mathematic model between the linear erosion rate(D),the two major factors,namely the heat flux density(q) and ablation time(t) is as follows :D = 0.612q0.0512 t0.0242 –1. Being verified,the regression model is very applicable and the forecast accuracy is good. So the erosion properties of PF/CF composite can be evaluated with this rapid,effective and accurate method in the oxyacetylene flame test.
引文
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