Abstract
In this work, the crack initiation angle from a notch in a single crystal shape memory alloy is discussed in detail. Three edge-notched single crystal CoNiAl specimens are tested under similar conditions to observe the crack initiation from the notch, and crack initiations at angles of 43 ± 1° are seen. The initiation angles are then calculated analytically using Generalized Maximum Tangential Stress (GMTS), and Maximum Energy Release Rate (MERR) criteria; the Strain Energy Density (SED) is plotted around the notch. Single edge-notched specimens are also modeled using ABAQUS. First the specimen is loaded up to austenite to martensitic transformation stress followed by further elastic loading of martensite. The results that are obtained analytically, and using Finite Elements (FE) are compared to the experimental ones, and a good agreement is seen.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 427-436 |
| Number of pages | 10 |
| Journal | Shape Memory and Superelasticity |
| Volume | 9 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 2023 |
Keywords
- Anisotropy
- Crack Initiation Angle
- Finite Elements
- Shape Memory Alloys
- Single Crystal CoNiAl
ASJC Scopus subject areas
- General Materials Science
- Mechanics of Materials