About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
Symposium
|
Applications
|
Presentation Title |
A Numerical and Experimental Approach to Understand the Fatigue Performance of Additively Manufactured Lattices |
Author(s) |
Valerio Carollo, Tyler London |
On-Site Speaker (Planned) |
Valerio Carollo |
Abstract Scope |
Metallic cellular materials and lattices offer unique combinations of thermal, mechanical and acoustic properties that are oftentimes unachievable with fully dense materials. Additive Manufacturing (AM) is capable of producing complex shapes, topologies, and unit cells that could not otherwise be produced. Certifying and guaranteeing the performance of lattice design concepts remains a significant challenge since AM lattices almost always deviate from their ideal geometry due to manufacturing imperfections. This is a result of strut thickness variations, build orientation effects, local oversizing or under-sizing, and process-induced distortion.
In this work, the influence of manufacturing defects on mechanical properties is investigated through experimental results and numerical models for prediction of the mechanical properties of the lattice structures. The numerical models take into account manufacturing defects using a stochastic finite element approach based on defects statistics. The model is calibrated and validated through the experimental data on specimens with varying lattice geometry. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |