Automatic Optical Crack Tracking for Double Cantilever Beam Specimens
| Autor: | Jason F. Patrick, Scott R. White, Kevin R. Hart, Nancy R. Sottos, Brett P. Krull |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Fabrication Cantilever Computer program Mechanical Engineering Composite number Image processing 02 engineering and technology Fiber-reinforced composite 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports Fracture toughness 0203 mechanical engineering Mechanics of Materials Composite material 0210 nano-technology Laminated glass |
| Zdroj: | Experimental Techniques. 40:937-945 |
| ISSN: | 1747-1567 0732-8818 |
| DOI: | 10.1007/s40799-016-0094-9 |
| Popis: | An automatic crack tracking scheme is developed for measuring the tensile opening (mode I) interlaminar fracture toughness (GIc) of continuous glass fiber-reinforced composite materials. The technique is directly compared to ASTM standard D5528, which contains a manual procedure to obtain GIc values from crack length data using a double cantilever beam (DCB) specimen. In this study, a custom computer program with edge detection software rapidly, automatically, and accurately tracks the crack front in translucent DCB specimens by optically monitoring dissimilarities between delaminated and intact portions of the sample. The program combines mechanical testing, image processing, and data collection subroutines into a single interface. The technique is compatible with sample geometries and fabrication processes described in ASTM D5528, and it requires only the addition of a charge-coupled device (CCD) and light source. Compared with the manual techniques outlined in the ASTM standard, the introduced method provides enhanced resolution and reduced workload to determine crack length and resulting GIc of continuous glass fiber-reinforced composite DCB samples. |
| Databáze: | OpenAIRE |
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