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Title: Increasing Interlaminar Strength in Large Scale Additive Manufacturing

Abstract

Interlaminar strength of extrusion-based additively manufactured parts is known to be weaker than the strength seen in the printed directions (X and Y). With Big Area Additive Manufacturing (BAAM), large parts lead to long layer times that are prone to splitting, sometimes referred to as delamination, between the layers. Fiber filled materials, such as carbon fiber reinforced ABS, are used to counter-act the effects of thermal expansion, but the fibers stay in-plane meaning that no fibers span from layer to layer, which helps counteract the weak interlaminar strength that causes splitting. A solution to this is a patent pending approach known as “z-pinning”. The process involves strategically positioning voids across multiple layers that will be backfilled with hot extrudate. This paper will explore the benefits and results of using “z-pinning” in large scale additive manufacturing.

Authors:
 [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1474443
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 29th International Solid Freeform Fabrication Symposium - Austin, Texas, United States of America - 8/13/2018 4:00:00 AM-8/15/2018 4:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Roschli, Alex C., Duty, Chad E., Lindahl, John M., Post, Brian K., Chesser, Phillip C., Love, Lonnie J., and Gaul, Katherine T. Increasing Interlaminar Strength in Large Scale Additive Manufacturing. United States: N. p., 2018. Web.
Roschli, Alex C., Duty, Chad E., Lindahl, John M., Post, Brian K., Chesser, Phillip C., Love, Lonnie J., & Gaul, Katherine T. Increasing Interlaminar Strength in Large Scale Additive Manufacturing. United States.
Roschli, Alex C., Duty, Chad E., Lindahl, John M., Post, Brian K., Chesser, Phillip C., Love, Lonnie J., and Gaul, Katherine T. Sat . "Increasing Interlaminar Strength in Large Scale Additive Manufacturing". United States. doi:. https://www.osti.gov/servlets/purl/1474443.
@article{osti_1474443,
title = {Increasing Interlaminar Strength in Large Scale Additive Manufacturing},
author = {Roschli, Alex C. and Duty, Chad E. and Lindahl, John M. and Post, Brian K. and Chesser, Phillip C. and Love, Lonnie J. and Gaul, Katherine T.},
abstractNote = {Interlaminar strength of extrusion-based additively manufactured parts is known to be weaker than the strength seen in the printed directions (X and Y). With Big Area Additive Manufacturing (BAAM), large parts lead to long layer times that are prone to splitting, sometimes referred to as delamination, between the layers. Fiber filled materials, such as carbon fiber reinforced ABS, are used to counter-act the effects of thermal expansion, but the fibers stay in-plane meaning that no fibers span from layer to layer, which helps counteract the weak interlaminar strength that causes splitting. A solution to this is a patent pending approach known as “z-pinning”. The process involves strategically positioning voids across multiple layers that will be backfilled with hot extrudate. This paper will explore the benefits and results of using “z-pinning” in large scale additive manufacturing.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 01 00:00:00 EST 2018},
month = {Sat Dec 01 00:00:00 EST 2018}
}

Conference:
Other availability
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