摘要
基于复合材料补片基体和胶层树脂黏弹性的特点,分别采用光固化和传统热固化方式制备了一系列不同树脂配方的试样,实验研究了树脂配方对修理结构应变率效应的影响,测定了复合材料粘接修理结构在不同加载速率下的力学性能。结果表明,树脂体系的交联度较低时,应变率效应更明显;加载速率的提高通常会使补片更好地发挥分担载荷的作用,但是也会导致变形协调能力的下降;这两个因素共同影响复合材料粘接结构的最终修理效率。加载速率对于复合材料粘接修理结构的破坏模式也有影响。
In light of the viscoelastic property of the adhesive and resin matrix of the composite patch, a series of specimens were prepared by UV curing and conventionally thermal curing methods. The effect of the resin formula on the strain rate was investigated. And the effect of the loading rate on the bonded composite repair structure was studied. Results show that the crosslinking degree of the resin is an important factor affecting the strain rate effect. The lower crosslinking degree may mean the more pronounced strain rate effect. The increase of the loading rate can enhance load-share fraction of the composite patch. However, the stress redistribution function of the composite and adhesive by deformation may be reduced. The loading rate can affect the failure modes of the bonded composite repair structure.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2013年第2期220-225,共6页
Acta Materiae Compositae Sinica
基金
中国博士后科学基金(20110491882)
