Effect of Submicron Glass Fiber Modification on Mechanical Properties of Short Carbon Fiber Reinforced Polymer Composite with Different Fiber Length

Abstract

In this research, three kinds of carbon fiber (CF) with lengths of 1, 3, and 25 mm were prepared for processing composite. The effect of submicron glass fiber addition (sGF) on mechanical properties of composites with different CF lengths was investigated and compared throughout static tests (i.e., bending, tensile, and impact), as well as the tension-tension fatigue test. The strengths of composites increased with the increase of CF length. However, there was a significant improvement when the fiber length changed from 1 to 3 mm. The mechanical performance of 3 and 25 mm was almost the same when having an equal volume fraction, except for the impact resistance. Comparing the static strengths when varying the sGF content, an improvement of bending strength was confirmed when sGF was added into 1 mm composite due to toughened matrix. However, when longer fiber was used and fiber concentration was high, mechanical properties of composite were almost dependent on the CF. Therefore, the modification effect of matrix due to sGF addition disappeared. In contrast to the static strengths, the fatigue durability of composites increased proportionally to the content of glass fiber in the matrix, regardless to CF length.

Recent Progress in Modifications, Properties, and Practical Applications of Glass Fiber

“…GF-reinforced polymers (GFRPs) are low-cost and easy to process. GFRPs show high strength, low density and have good heat and sound insulation performance [ 159 , 160 , 161 , 162 , 163 , 164 , 165 , 166 ], overcoming the limitations of the individual materials and improving the comprehensive performance of the material. However, a large amount of GFRP waste is also produced, causing a substantial waste of resources, and recycling and utilization of the waste materials is a new challenge [ 167 ].…”

Analysis of Elastic Properties According to the Aspect Ratio of UHMWPE Fibers Added to PP/UHMWPE Composites

“…To overcome these research limitations, it is necessary to study both the fiber volume fractions and aspect ratios. Existing studies have been conducted by adjusting the aspect ratio of the CF in carbon fiber/geopolymer-based composites [26][27][28], and by examining the mechanical strength inside glass fiber and vinyl ester resin polymers [29,30]. According to these research results, the higher the aspect ratio of the fiber, the higher the mechanical strength.…”