About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Microstructure-Driven Fracture Behavior and Thermo-Mechanical Analysis of Large Area Additive Manufactured Short Fiber Composites |
Author(s) |
Arief Yudhanto, Neshat Sayah, Douglas E. Smith |
On-Site Speaker (Planned) |
Douglas E. Smith |
Abstract Scope |
Large area additive manufacturing (LAAM) of short carbon fiber polymer composites has proven effective for producing meter-scale parts. Unfortunately, LAAM parts exhibit substandard strength due in-part to process-induced microstructural defects including microvoids within the printed beads. In this work, microCT-based microstructural characterization, fracture mechanics, and thermal-mechanical transient analysis of LAAM-produced polymer composites are performed to better understand the effect of processing on part strength. Double cantilever beam tests measure interbead and interbead fracture toughness of CF/ABS where testing includes single-bead, double-bead, and multiple-bead samples. The effect of microstructural voids and fibers on thermal history, degree of healing, and thermal-induced residual stresses of LAAM beads are evaluated with the finite element method. Bead fiber orientation is measured using microCT which is then used to compute thermal-mechanical properties for our simulations. Thermal-induced residual stresses and experimental fracture behaviors are then correlated to provide unique insight processing effects on LAAM part strength. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |