Obtaining repeatable initial fiber orientation for the transient rheology of fiber suspensions in simple shear flow

2016 ◽  
Vol 60 (1) ◽  
pp. 161-174 ◽  
Author(s):  
Mark J. Cieslinski ◽  
Donald G. Baird ◽  
Peter Wapperom
Keyword(s):  
Shear Flow ◽  
Simple Shear ◽  
Fiber Orientation ◽  
Simple Shear Flow ◽  
Fiber Suspensions ◽  
Transient Rheology ◽  
Initial Fiber

Fiber orientation kinetics of a concentrated short glass fiber suspension in startup of simple shear flow

2010 ◽  
Vol 165 (3-4) ◽  
pp. 110-119 ◽  
Author(s):  
Aaron P.R. Eberle ◽  
Gregorio M. Vélez-García ◽  
Donald G. Baird ◽  
Peter Wapperom
Keyword(s):  
Shear Flow ◽  
Glass Fiber ◽  
Simple Shear ◽  
Fiber Orientation ◽  
Fiber Suspension ◽  
Simple Shear Flow ◽  
Short Glass Fiber ◽  
Kinetics Of ◽  
Short Glass

Shear-induced diffusion in dilute curved fiber suspensions in simple shear flow

2014 ◽  
Vol 26 (3) ◽  
pp. 033301 ◽  
Author(s):  
Jianghui Wang ◽  
Michael D. Graham ◽  
Daniel J. Klingenberg
Keyword(s):  
Shear Flow ◽  
Simple Shear ◽  
Simple Shear Flow ◽  
Fiber Suspensions

Hydrodynamic, translational diffusion in fiber suspensions subject to simple shear flow

1993 ◽  
Vol 5 (4) ◽  
pp. 849-862 ◽  
Author(s):  
Mani Rahnama ◽  
Donald L. Koch ◽  
Yoichi Iso ◽  
Claude Cohen
Keyword(s):  
Shear Flow ◽  
Simple Shear ◽  
Translational Diffusion ◽  
Simple Shear Flow ◽  
Fiber Suspensions

scholarly journals Experimental Validation of a Direct Fiber Model for Orientation Prediction

2020 ◽  
Vol 4 (2) ◽  
pp. 59
Author(s):  
Sara Andrea Simon ◽  
Abrahán Bechara Senior ◽  
Tim Osswald
Keyword(s):  
Shear Flow ◽  
Shear Strain ◽  
Simple Shear ◽  
Fiber Orientation ◽  
Initial Conditions ◽  
Simple Shear Flow ◽  
Boundary Cell ◽  
Particle Level ◽  
A Chain ◽  
Sliding Plate

Predicting the fiber orientation of reinforced molded components is required to improve their performance and safety. Continuum-based models for fiber orientation are computationally very efficient; however, they lack in a linked theory between fiber attrition, fiber–matrix separation and fiber alignment. This work, therefore, employs a particle level simulation which was used to simulate the fiber orientation evolution within a sliding plate rheometer. In the model, each fiber is accounted for and represented as a chain of linked rigid segments. Fibers experience hydrodynamic forces, elastic forces, and interaction forces. To validate this fundamental modeling approach, injection and compression molded reinforced polypropylene samples were subjected to a simple shear flow using a sliding plate rheometer. Microcomputed tomography was used to measure the orientation tensor up to 60 shear strain units. The fully characterized microstructure at zero shear strain was used to reproduce the initial conditions in the particle level simulation. Fibers were placed in a periodic boundary cell, and an idealized simple shear flow field was applied. The model showed a faster orientation evolution at the start of the shearing process. However, agreement with the steady-state aligned orientation for compression molded samples was found.

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