Analysis of surface cracks by holography
β Scribed by P. Will; W. Totzauer; B. Michel
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 592 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0167-8442
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Reflection electron holography is described as a method to observe sub-A surface morphology. Phase shift of a Bragg-reflected electron wave was measured by means of holographic interferometry using an electron microscope equipped with a field emission electron gun and an electron biprism. A short wa
Two kinds of surface cracked specimens are numerically analyzed by the three dimensional elastic-plastic FEM. Near tip regions are divided into fine elements, and the stress and displacement fields at the crack tip are compared with HRR solutions. At first, surface cracked specimens subjected to be