Processing-Structure-Performance Relationships in Fused Filament Fabricated Fiber Reinforced ABS for Material Qualification
Abstract
Fused filament fabrication (FFF) is an additive manufacturing technique that utilizes the layering of deposited molten plastic to create three dimensional objects. A better understanding of the process-microstructure-performance relationships is essential to develop material qualification standards. This research aimed to characterize some of these relationships (specifically the effects of print parameters on tensile and interface fracture behavior) to inform the development of qualification standards for FFF parts. In Section 1, a comprehensive analysis of the current state of the art in fracture of FFF parts is presented and discussed. The rheological specific phenomena that govern the polymer chain physics at interfaces and within deposited beads is included due to its impact on the mechanical properties of the printed material. In Section 2, a commonly used tensile testing standard is explored and demonstrated on carbon fiber reinforced acrylonitrile-butadiene-styrene (ABS). Due to the complex manufacturing process, new naming standards and testing recommendations are made and the influence of part production methodologies and processing parameters on ultimate tensile strength are explored. The response of fiber reinforced and non-reinforced ABS in environmental conditioning is tested and discussed in Section 3. Specimens were exposed to heat and moisture to represent onboard conditions and evaluated under tension loading. Section 4 introduces a potential testing specimen for obtaining multiple fracture modes. Through this test specimen, the nature of the material as a laminate or as a porous homogeneous material is explored.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2021
- Accession Number
- AD1144231
Entities
People
- Stephanie C. Termaath
- William H. Ferrell
Organizations
- University of Tennessee