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- 2015
基于模具预先补偿法的大幅面CFRP制件形状精度控制方法
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Abstract:
针对控制大幅面CFRP制件成型后的形状精度这一关键技术问题, 在剪切层法预测变形的基础上提出了一种改进的剪切层变形模拟方法。改进的方法只需少量制件实验数据, 通过计算应变曲线曲率确定剪切层厚度, 进而较准确地预测了CFRP制件的翘曲变形。基于变形模拟方法建立了一种大幅面CFRP制件形状精度控制方法, 这一方法通过将模拟获得的变形不断补偿于初始模具型面来降低最终制件的变形。通过与实验数据的对比, 证明了采用控制方法可以有效提高成型制件的精度, 降低变形。 Aiming at the shape precision control after the molding of large scale CFRP parts, which is one of the key technical problems, a modified shear-layer deformation simulation method was proposed based on the deformation prediction by shear-layer method. The modified method only needed a little test data, and the thickness of shear-layer could be determined by calculating the curvature of strain curve, then the warp deformation of CFRP parts could be predicted more exactly. A shape precision control method for large scale CFRP parts was developed based on the deformation simulating method above. This method could reduce the deformation of final parts by repeatedly compensating the deformation acquired by simulation to the initial mould surface. The comparison with the experimental data proved that the method above could effectively improve the accuracy and reduce the deformation of molding parts. 国家"863"计划(2012AA03A202); 黑龙江省教育厅科研基金(12511441); 哈尔滨青年科技创新人才研究项目(2013RFQYJ161)
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