Unambiguous Determination of 3D Fiber Orientation Distribution in Thermoplastic Composites Using SAM Image of Elliptical Mark and Interference Fringe

2005 ◽  
Vol 39 (4) ◽  
pp. 287-299 ◽  
Author(s):  
Munehiro Kawamura ◽  
Satoshi Ikeda ◽  
Satoru Morita ◽  
Yukio Sanomura
Keyword(s):  
Fiber Orientation ◽  
Interference Fringe ◽  
Orientation Distribution ◽  
Thermoplastic Composites ◽  
Unambiguous Determination ◽  
Fiber Orientation Distribution

scholarly journals Uncertainty quantification of fiber orientation distribution measurements for long-fiber-reinforced thermoplastic composites

2017 ◽  
Vol 52 (13) ◽  
pp. 1781-1797 ◽  
Author(s):  
Bhisham N Sharma ◽  
Diwakar Naragani ◽  
Ba Nghiep Nguyen ◽  
Charles L Tucker ◽  
Michael D Sangid
Keyword(s):  
Cross Sections ◽  
Fiber Orientation ◽  
Surface Preparation ◽  
Orientation Distribution ◽  
Elastic Stiffness ◽  
Thermoplastic Composites ◽  
Fiber Reinforced ◽  
Fiber Orientation Distribution ◽  
Discontinuous Fiber ◽  
Reinforced Thermoplastics

We present a detailed methodology for experimental measurement of fiber orientation distribution in injection-molded discontinuous fiber composites using the method of ellipses on two-dimensional cross sections. Best practices to avoid biases occurring during surface preparation and optical imaging of carbon-fiber-reinforced thermoplastics are discussed. A marker-based watershed transform routine for efficient image segmentation and the separation of touching fiber ellipses is developed. The sensitivity of the averaged orientation tensor to the image sample size is studied for the case of long-fiber thermoplastics. A Mori–Tanaka implementation of the Eshelby model is then employed to quantify the sensitivity of elastic stiffness predictions to biases in the fiber orientation distribution measurements.

Evaluation of Fiber Orientation Prediction of Moldflow Using an Injection Molded IP Panel

2013 ◽  
Author(s):  
Xianjun Sun ◽  
Yuan Gan ◽  
John Lasecki ◽  
Danielle Zeng ◽  
Li Qi ◽  
...  
Keyword(s):  
Fiber Orientation ◽  
Principal Eigenvalue ◽  
Orientation Distribution ◽  
Thermoplastic Composites ◽  
Orientation Tensor ◽  
X Ray ◽  
Fiber Orientation Distribution ◽  
Average Distribution ◽  
Injection Molded ◽  
Component Image

The fiber orientation distribution is one of the important microstructural variables for thermoplastic composites reinforced with discontinuous fibers. In this article, Moldflow is used to predict the fiber orientation distribution in an automotive component. Image analysis by MATLAB is adopted to validate the simulated results after taking pictures of fibers by X-ray CT. It is shown that the Moldflow predicts the average distribution in direction of the thickness accurately, with predicted eigenvalue of the orientation tensor within 5% of that measured. However, it failed to capture the change of principal eigenvalue in thickness direction.

Effect of Fiber Orientation on the Tensile Strength in Fiber-Reinforced Polymeric Composite Materials

2005 ◽  
Vol 297-300 ◽  
pp. 2897-2902 ◽  
Author(s):  
Jin Woo Kim ◽  
Jung Ju Lee ◽  
Dong Gi Lee
Keyword(s):  
Tensile Strength ◽  
Composite Material ◽  
Fiber Orientation ◽  
Polymeric Composite ◽  
Orientation Distribution ◽  
Fiber Content ◽  
Fiber Reinforced ◽  
Composite Sheet ◽  
Content Ratio ◽  
Fiber Orientation Distribution

The study for strength calculation of one way fiber-reinforced composites and the study measuring precisely fiber orientation distribution were presented. However, because the DB that can predict mechanical properties of composite material and fiber orientation distribution by the fiber content ratio was not constructed, we need the systematic study for that. Therefore, in this study, we investigated what effect the fiber content ratio and fiber orientation distribution have on the strength of composite sheet after making fiber reinforced polymeric composite sheet by changing fiber orientation distribution with the fiber content ratio. The result of this study will become a guide to design data of the most suitable parts design or fiber reinforced polymeric composite sheet that uses the fiber reinforced polymeric composite sheet in industry spot, because it was conducted in terms of developing products. We studied the effect the fiber orientation distribution has on tensile strength of fiber reinforced polymeric composite material and achieved this results below. We can say that the increasing range of the value of fiber reinforced polymeric composite’s tensile strength in the direction of fiber orientation is getting wider as the fiber content ratio increases. It shows that the value of fiber reinforced polymeric composite’s tensile strength in the direction of fiber orientation 90° is similar with the value of polypropylene’s intensity when fiber orientation function is J= 0.7, regardless of the fiber content ratio. Tensile strength of fiber reinforced polymeric composite is affected by the fiber orientation distribution more than by the fiber content ratio.

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