Comparative Analysis of Water-induced Response in 3D-Printed SCF/ABS Composites under Controlled Diffusion

Event Type Seminar, Colloquia, Invited Talk, Conference
Is this event (co-)sponsored by ASPIRE? Yes
Is this event innovation focused? No
Event Name SAMPE 2024 Conference & Exhibition
Event Location Long Beach, CA
Event Start Date 05/21/2024
Event End Date 05/23/2024
Number of Attendees 200
Number of Student Attendees 50
Number of Teacher/Faculty Attendees 150
Which project does this pertain to? Electrified Roadways
Presentation Title or Topic Comparative Analysis of Water-induced Response in 3D-Printed SCF/ABS Composites under Controlled Diffusion
Presenters Samiul Alam

Additive manufacturing (AM) or 3D printing of fiber-reinforced composites (FRCs) has garnered significant interests for its versatility in creating intricate parts and rapid prototyping due to cost-effectiveness. Although short fiber-reinforced thermoplastic composites are challenging to manufacture, their mechanical properties are enhanced. However, void formation during printing is a key issue, impacting mechanical properties and facilitating water ingress, affecting long-term durability. This work studies water diffusion characteristics and associated hydro-aging of 3D-printed short carbon fiber (SCF)/acrylonitrile butadiene styrene (ABS) composites with controlled water diffusion. Effects of material type (ABS and SCF/ABS), 3D printing path (horizontal and vertical filament orientation), and diffusion surface (uni-directional and bi-directional diffusion) on water diffusion coefficient and maximum water absorption level are characterized to ensure the long-term durability of 3D-printed ABS and SCF/ABS composites. Baseline representative volume element-based finite element (RVE-FE) diffusion models were developed based on micro-computed tomography (micro-CT) image analysis of each specimen to understand water diffusion characteristics. This work proves that the SCF/ABS composite is more resistive to hydro-aging than neat ABS due to the SCFs’ hydrophobic nature. SCF/ABS composites, while providing distinct advantages over pure ABS in terms of mechanical properties, could also be more effective against moist conditions.

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