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Self-healing materials, when damaged, are designed to sense the failure and respond in an autonomous fashion to restore structural function. Inspired by biological systems, synthetic self-healing materials represent a new paradigm in the design of polymer based composites. This overview article summarizes the different strategies and approaches to achieving self-healing functionality and discusses future directions in the nascent field. The strategies are broadly classified into the following three categories: healing with an embedded liquid phase repair agent, thermally activated solid phase healing, and healing of projectile puncture.
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Michael R. Kessler (2007) studied this question.
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