Self-healing of impact damage in fiber-reinforced composites

被引：24
作者：
Hart, Kevin R. [1 ,2 ]
Wetzel, Eric D. [3 ]
Sottos, Nancy R. [2 ,4 ]
White, Scott R. [1 ,2 ]
机构：
[1] Univ Illinois, Dept Aerosp Engn, 104 S Wright Sr, Urbana, IL 61801 USA
[2] Univ Illinois, Beckman Inst Adv Sci & Technol, 405 N Mathews Ave, Urbana, IL 61801 USA
[3] US Army, Weap & Mat Res Directorate, Res Lab, 4600 Deer Creek Loop, Aberdeen Proving Ground, MD 21005 USA
[4] Univ Illinois, Dept Mat Sci & Engn, 1304 W Green St, Urbana, IL 61801 USA
来源：
COMPOSITES PART B-ENGINEERING | 2019年 / 173卷
关键词：
Woven composite; Impact; Self-healing; Vascular; COMPRESSION; POLYMERS;
D O I：
10.1016/j.compositesb.2019.05.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Healing of impact damage in vascular fiber-reinforced composite beam specimens was explored using a flexure after impact testing protocol. Two-part epoxy and amine based healing agents were delivered to impact-damaged beam specimens using a novel air assisted reagent delivery scheme. The incorporation of microchannels into composite specimens did not alter the flexural stiffness or strength of the composites, however, the post impact flexural strength was reduced, on average, by 25.7%. Flexure testing of healed specimens demonstrated 47% recovery of strength and 83% recovery of moduli when compared to control samples in which no agents were delivered. Optical cross-sectional micrographs reveal that not all damage regions are infiltrated during healing as a result of incomplete damage connectivity. A damage filling efficiency during healing agent infiltration was calculated and was found to positively correlate with recovery of post-impact strength.
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页数：8
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