PRESSURE TRANSFER FOR COMPOSITE AUTOCLAVE PROCESS WITH TWO-SIDE RIGID MOLD AND THE INFLUENCING FACTORS ON ITS PROCESS QUALITY

Abstract

Abstract: This paper focuses on the autoclave process by using two-side rigid steel mold. The influence of mold tolerance on the process quality of composite laminate was investigated. The effects of mold tolerance and prepreg thickness difference on stress distribution and resin flow inside prepreg were revealed by finite element analysis. Furthermore, a self-designed resin pressure online monitoring system was used to verify the stress distribution caused by two-side rigid mold. The results show that the process quality is closely related to mold tolerance when the two-side rigid mold is used. Void and delamination are easy to be caused at the negative tolerance area. The lamina and interlaminar thicknesses at positive tolerance area are smaller than those at negative tolerance area. Both resin pressure measurement and finite element analysis indicate that mold tolerance and prepreg thickness difference may cause uneven stress distribution, which are also the main reasons for manufacturing defects. Thicker prepreg and full impreg-nation of the gap between mold and prepreg are beneficial to improve stress distribution. These results may contribute to the manufacturing and quality control of advanced composite with high surface precision.

Key words: autoclave, prepreg, rigid mold, resin pressure, process quality

CLC Number:

TB332

LU Xin, LI Qian-qian, WANG Shao-kai, LI Yan-xia. PRESSURE TRANSFER FOR COMPOSITE AUTOCLAVE PROCESS WITH TWO-SIDE RIGID MOLD AND THE INFLUENCING FACTORS ON ITS PROCESS QUALITY[J]. Fiber Reinforced Plastics/Composites, 2019, 0(8): 87-93.

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