Research On Method And Influence Of Permeability Measurement Of Fiber Perform Transvers

The investigation is funded by the National Natural Science Foundation of China (No. 50573060).LCM (Liquid Composites Molding) in recent years is much attention to a class of composite materials to produce high-performance technology, RTM (Resin Transfer Molding) and RFI (Resin Film Infusion) is representative of both processes. There are two processes in liquid resin on the fabric of the infiltration process, but the former is mainly in the in-plane penetration, the latter is mainly penetrated with the thickness of fabric along the main direction of infiltration. The fabric is the impact of resin penetration in which the flow of important parameters in the process of the resin acts to infiltrate a direct impact on the quality of products, research fiber preform penetration testing technology, as well as their accurate determination, the actual production process technology Optimization and product quality control, as well as further study of numerical simulation are of great significance.This article focuses on a fiberglass fabric in the plane and to the law of penetration testing technology, data-processing methods, and constitute of a form of fabric, porosity, and other factors on penetration.First of all, on the fabric preform penetration testing device has been designed with the processing, die design of the two, to develop two experimental programs, respectively, for the fabric of the plane to the law and the penetration rate of penetration testing, the results show that the Device can be more easily achieve Constant pressure injection and the penetration test.The use of self-designed plane penetration test devices, used to infiltrate the parallel measurement of order, on the surface of the fiber preform with unsaturated penetration rate was one-dimensional experimental research, using the traditional methods of data processing, through the analysis of experimental data processing, which have been pre-calculated the average penetration rate. As the data used in the experiment is in the process of multi-point measurements, it can be for the entire process of filling a very good description of the penetration test results with high accuracy and stability.Designed to use the law to the penetration layer tester, fiber preform on the shop floor to the law of unsaturated permeability was focused on experimental studies, among the experimental data analysis and processing, the paper used the traditional methods of data processing, step-by-step And sub-difference method, through a variety of data-processing methods of penetration and through. the value of comparative analysis, it comes to the sub-step for the unsaturated permeability test results to deal with a more rational and effective.Finally, an analysis of fabric and size constitute a form of content (or porosity) and the penetration rate. Research shows that constitute the fabric in the form of greater penetration of the impact of the same fabric as the penetration rate in the form of fiber volume and higher content of the non-linear reduction, a lower rate with the volume of content increased gradually slow down; Fabric-plane penetration to non-saturated layer is much larger than normal unsaturated permeability. This paper also discussed the role of the capillary effect and the edge effect of the penetration experiment.