Kontaxis Lykourgos C, Kozaniti Foteini K, Papanicolaou George C
Composite Materials Group, Department of Mechanical Engineering and Aeronautics, University of Patras, GR 265 04 Patras, Greece.
Materials (Basel). 2021 Nov 2;14(21):6587. doi: 10.3390/ma14216587.
The aim of the present study is to investigate the inclusion geometry and concentration effect on the quasi-static properties of a starch-epoxy hybrid matrix composite. The composites investigated consisted of a starch-epoxy hybrid matrix reinforced with four different glass inclusions such as 3 mm long chopped strands, 0.2 mm long short glass fibers, glass beads (120 μm in diameter) and glass bubbles (65 μm in diameter) at different concentrations. The flexural modulus and the strength of all materials tested were determined using three-point bending tests. The Property Prediction Model (PPM) was applied to predict the experimental findings. The model predicted remarkably well the mechanical behavior of all the materials manufactured and tested. The maximum value of the flexural modulus in the case of the 3 mm long chopped strands was found to be 75% greater than the modulus of the hybrid matrix. Furthermore, adding glass beads in the hybrid matrix led to a simultaneous increase in both the flexural modulus and the strength.
本研究的目的是研究包裹体几何形状和浓度对淀粉-环氧杂化基体复合材料准静态性能的影响。所研究的复合材料由淀粉-环氧杂化基体组成，该基体用四种不同的玻璃包裹体增强，如3毫米长的短切纤维、0.2毫米长的短玻璃纤维、玻璃珠（直径120微米）和玻璃微珠（直径65微米），且浓度各不相同。使用三点弯曲试验测定所有测试材料的弯曲模量和强度。应用性能预测模型（PPM）来预测实验结果。该模型对所有制造和测试材料的力学行为预测得非常好。在3毫米长的短切纤维的情况下，弯曲模量的最大值比杂化基体的模量高75%。此外，在杂化基体中添加玻璃珠会导致弯曲模量和强度同时增加。
