四步法三维编织预型件的细观结构及拉伸性能预测

Microstructure and Tensile Properties Prediction of 4step 3D Braided Preforms

基于三维编织预型件细观结构的数学表达 ,提出在小拉伸变形和大拉伸变形下预测整段拉伸曲线的预测方法 ,该方法真实地反映了编织物的拉伸过程。最后与实验结果进行比较 ,具有很好的一致性。由于编织物强度预测的复杂性 。

Based on the mathematical description of microstructure of 3D preforms, the thereotical model and algorithms of calculating the tensile strength and whole tensile curve of 3D braided preforms at small and large deformations are put forword.From the comparison the calculated results and experimental results,there are good agreement between them, and it is also proven that the method could precisely predict the tensile strength of 3D braided preforms. Owing to the complexcity to predict the strength, this method could induce more progress in solving problems of strength predicting.