About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Incorporating Residual Stress and Surface Condition in a Fracture Mechanics Based Criteria for Curvature of Additively Manufactured Parts |
| Author(s) |
Sushant K. Jha, Shamachary Sathish, Nathan Bryant, Hannah Moen-Vazquez, Howard Sizek |
| On-Site Speaker (Planned) |
Sushant K. Jha |
| Abstract Scope |
Additive manufacturing (AM) has enabled significant flexibility in design complexities in parts, which can be printed directly from digital models. Successful printing of a part by AM, however, requires careful consideration of residual stress in the as-printed state. If not accounted for, residual stress can distort the part and also cause cracking and fracture at geometric features leading to build or component failure. General criteria are often applied for designing curvature at geometric features as well as the transition from the build plate to the part. These generalized criteria often result in multiple iterations before successful, crack-free printing. We propose a fracture mechanics-based criteria for the curvature of geometric features that is material dependent and incorporates the residual stress level and surface roughness at the feature. The method is demonstrated using a case study on an AM part made of Ti-6Al-4V. |