Next Article in Journal
Strain State Detection in Composite Structures: Review and New Challenges
Next Article in Special Issue
Fiber Orientation Predictions—A Review of Existing Models
Previous Article in Journal
Finite Element Modeling of the Fiber-Matrix Interface in Polymer Composites
Open AccessArticle

Experimental Validation of a Direct Fiber Model for Orientation Prediction

Polymer Engineering Center (PEC), University of Wisconsin-Madison, 1513 University Ave, Madison, WI 53706, USA
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2020, 4(2), 59; https://doi.org/10.3390/jcs4020059
Received: 24 April 2020 / Revised: 16 May 2020 / Accepted: 19 May 2020 / Published: 25 May 2020
(This article belongs to the Special Issue Discontinuous Fiber Composites, Volume II)
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. View Full-Text
Keywords: fiber reinforced plastics; long fiber reinforced thermoplastics (LFT); sliding plate rheometer; fiber microstructure; fiber orientation; direct fiber simulation; mechanistic model fiber reinforced plastics; long fiber reinforced thermoplastics (LFT); sliding plate rheometer; fiber microstructure; fiber orientation; direct fiber simulation; mechanistic model
Show Figures

Figure 1

MDPI and ACS Style

Simon, S.A.; Bechara Senior, A.; Osswald, T. Experimental Validation of a Direct Fiber Model for Orientation Prediction. J. Compos. Sci. 2020, 4, 59.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop