Various methods are used for the evaluation of the healing efficiency. One of the three fracture modes (i.e., Mode I, II or III, Figure 5.1) is induced in two sets of devices. The first set of devices includes samples from the original host material; the second set includes samples containing the self-healing agent and the catalyst. After the healing process is completed, a standard test is performed to compare the two sets of the devices. A second test can be run in parallel, or separately, to validate the results from the first test. Some of the common tests used to measure self-healing efficiency are as follows: stretching the sample up to its rupture; three and four-point flexure bend tests; indentation tests; ballistic test with projectile; hypervelocity impact test; accelerated aging damage tests.

Chapter Contents:

• 5.1 Methods with a three-and four-point bend test
• 5.1 Methods with a three-and four-point bend test
• 5.2 Tapered double-cantilever beam
• 5.2 Tapered double-cantilever beam
• 5.3 Compression after impact
• 5.3 Compression after impact
• 5.4 Combining the four-point bend test and acoustic emission
• 5.4 Combining the four-point bend test and acoustic emission
• 5.5 Methods with dynamic impact
• 5.5 Methods with dynamic impact
• 5.5.1 Indentation test with a dropping mass
• 5.5.1 Indentation test with a dropping mass
• 5.5.2 High-speed ballistic projectile
• 5.5.2 High-speed ballistic projectile
• 5.5.3 Hypervelocity impact
• 5.5.3 Hypervelocity impact
• 5.6 Fibre Bragg grating sensors for self-healing detection
• 5.6 Fibre Bragg grating sensors for self-healing detection
• References
• References

Inspec keywords: ageing; bending; impact (mechanical); carbon fibre reinforced plastics; indentation; ballistics; intelligent materials

Other keywords: ballistic testing; flexure bend testing; accelerated ageing; carbon fibre reinforced polymers; indentation; self-healing efficiency; self-healing materials testing; stretching; hypervelocity impact test; rupture; thermal shocks

Subjects: Surface treatment and degradation of composites; Fatigue, brittleness, fracture, and cracks; Engineering materials; Fatigue, embrittlement, and fracture; Ballistics and mechanical impact (mechanical engineering); Deformation and plasticity; Deformation, plasticity and creep; Plasticity (mechanical engineering); Intelligent materials