Self-Healing Fibre Reinforced Composites via a Bioinspired Vasculature
Self-Healing Fibre Reinforced Composites via a Bioinspired Vasculature
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DOI：
10.1002/adfm.201101100
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发表时间：
2011-10-07
影响因子：
19
通讯作者：
Trask, Richard S.
中科院分区：
文献类型：
--
作者：
Norris, Christopher J.;Meadway, Gregory J.;Trask, Richard S.
本文展示了自我修复复合材料的第一步，利用骨的损伤容限和自我修复功能的启发设计理念。纤维增强聚合物（FRP）或骨中的裂纹，如果不加注意，可能会在随后的循环应力下增长，最终导致结构的灾难性故障。在检测到裂缝时，必须修复或完全更换FRP组件，而骨利用一系列复杂的过程来修复这种损伤。在正常情况下，这些过程允许骨骼在生物体的整个生命周期内持续发挥作用，这是工程材料非常理想的愿望。通过“失蜡”工艺将简单的脉管系统设计并入FRP中，发现其有助于自愈合功能，这导致冲击后压缩强度的显著恢复（>= 96%）。这个过程涉及通过血管通道注入愈合树脂。树脂从背面损伤中流出、超声C扫描测试和显微镜评价均提供了证据，证明存在足够的血管损伤连通性，以提供可靠和有效的自我修复功能。
This paper demonstrates the first steps towards self-healing composites that exploit a design philosophy inspired by the damage tolerance and self-repair functions of bone. Cracking in either fibre reinforced polymers (FRP) or bone, if left unattended, can grow under subsequent cyclic stresses eventually leading to catastrophic failure of the structure. On detection of cracks, an FRP component must be repaired or completely replaced, whereas bone utilises a series of complex processes to repair such damage. Under normal circumstances, these processes allow the skeleton to continually perform over the lifespan of the organism, a highly desirable aspiration for engineering materials. A simple vasculature design incorporated into a FRP via a "lost wax" process was found to facilitate a self-healing function which resulted in an outstanding recovery (>= 96%) in post-impact compression strength. The process involved infusion of a healing resin through the vascule channels. Resin egress from the backface damage, ultrasonic C-scan testing, and microscopic evaluation all provide evidence that sufficient vascule-damage connectivity exists to confer a reliable and efficient self-healing function.