Automated Fiber Extraction From SEM Images With Application to Quality Control of Fiber-Reinforced Composites Manufacturing

2018 ◽  
Author(s):  
Md. Fashiar Rahman ◽  
Jianguo Wu ◽  
Bill Tseng
Keyword(s):  
Hough Transform ◽  
Decisive Role ◽  
Fiber Reinforced ◽  
Sem Images ◽  
Composites Manufacturing ◽  
Fiber Extraction ◽  
Morphology Analysis ◽  
Spatial Uniformity ◽  
Gradient Based ◽  
Opening Method

The morphology of fibers (e.g., spatial uniformity and orientation) plays a decisive role in determining the material properties or fabrication quality of fiber-reinforced nanocomposites. The existing literature lacks a reliable and automatic fiber extraction method for morphology analysis based on the scanning electron microscope (SEM) images. This paper proposes four different methods, namely, the simple Hough Transform, opening method, partitioning Hough Transform and gradient based Hough Transform, to automatically identify the fibers from SEM images to expedite the morphology analysis. The performance of these methods are thoroughly evaluated and compared through simulation studies and real case studies.

scholarly journals From SEM images to elastic responses: A stochastic multiscale analysis of UD fiber reinforced composites

2018 ◽  
Vol 189 ◽  
pp. 206-227 ◽  
Author(s):  
Ling Wu ◽  
Chi Nghia Chung ◽  
Zoltan Major ◽  
Laurent Adam ◽  
Ludovic Noels
Keyword(s):  
Multiscale Analysis ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Sem Images ◽  
Elastic Responses

scholarly journals Glass Fiber Reinforced Composite Orthodontic Retainer: In Vitro Effect of Tooth Brushing on the Surface Wear and Mechanical Properties

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1028 ◽  
Author(s):  
Maria Francesca Sfondrini ◽  
Pekka Kalevi Vallittu ◽  
Lippo Veli Juhana Lassila ◽  
Annalisa Viola ◽  
Paola Gandini ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Resin Composite ◽  
Maximum Load ◽  
Tooth Brushing ◽  
Bending Test ◽  
Bending Stress ◽  
Fiber Reinforced ◽  
Sem Images ◽  
Surface Cover

Fiber reinforced composites (FRCs) are metal free materials that have many applications in dentistry. In clinical orthodontics, they are used as retainers after active treatment in order to avoid relapse. However, although the modulus of the elasticity of FRCs is low, the rigidity of the material in the form of a relatively thick retainer with a surface cover of a flowable resin composite is known to have higher structural rigidity than stainless steel splints. The aim of the present study is to measure load and bending stress of stainless steel wires, as well as flowable resin composite covered and spot-bonded FRC retainer materials after tooth brushing. These materials were tested with a three point bending test for three different conditions: no brushing, 26 min of brushing, and 60 min of brushing. SEM images were taken before and after different times of tooth brushing. Results showed that stainless steel was not significantly affected by tooth brushing. On the other hand, a significant reduction of values at maximum load at fracture was reported for both FRC groups, and uncovered FRCs were most affected. Concerning maximum bending stress, no significant reduction by pretreatment conditions was reported for the materials tested. SEM images showed no evident wear for stainless steel. Flowable resin composite covered FRCs showed some signs of composite wear, whereas spot-bonded FRCs, i.e., without the surface cover of a flowable resin composite, showed signs of wear on the FRC and exposed glass fibers from the FRC’s polymer matrix. Because of the significant changes of the reduction of maximum load values and the wear for spot-bonded FRCs, this technique needs further in vitro and in vivo tests before it can be performed routinely in clinical practice.

Gradient-based Hough transform for the detection and characterization of defects during nondestructive inspection

1997 ◽  
Author(s):  
Lew F. L. Y. Voon ◽  
Patrice Bolland ◽  
Olivier Laligant ◽  
Patrick Gorria ◽  
B. Gremillet ◽  
...  
Keyword(s):  
Hough Transform ◽  
Nondestructive Inspection ◽  
Gradient Based

scholarly journals Gradient based progressive probabilistic Hough transform

2001 ◽  
Vol 148 (3) ◽  
pp. 158 ◽  
Author(s):  
C. Galambos ◽  
J. Kittler ◽  
J. Matas
Keyword(s):  
Hough Transform ◽  
Gradient Based

scholarly journals Experimental Study on Unconfined Compressive Strength of Basalt Fiber Reinforced Clay Soil

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Lei Gao ◽  
Guohui Hu ◽  
Nan Xu ◽  
Junyi Fu ◽  
Chao Xiang ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Clay Soil ◽  
Soil Column ◽  
Basalt Fiber ◽  
Dry Density ◽  
Fiber Reinforced ◽  
Maximum Dry Density ◽  
Sem Images ◽  
Reinforced Clay

In order to study the mechanism and effect of basalt fiber reinforced clay soil, a series of unconfined compressive strength tests conducted on clay soil reinforced with basalt fiber have been performed under the condition of optimum water content and maximum dry density. Both the content and length of basalt fiber are considered in this paper. When the effect of content is studied, the 12 mm long fibers are dispersed into clay soil at different contents of 0.05%, 0.1%, 0.15%, 0.20%, 0.25%, 0.30%, and 0.35%. When the effect of length is researched, different lengths of basalt fibers with 4 mm, 8 mm, 12 mm, and 15 mm are put into soil at the same content of 0.05%. Experimental results show that basalt fiber can effectively improve the UCS of clay soil. And the best content and length are 0.25% and 12 mm, respectively. The results also show that the basalt fiber reinforced clay soil has the “poststrong” characteristic. About the reinforcement mechanism, the fiber and soil column-net model is proposed in this paper. Based on this model and SEM images, the effect of fiber content and length is related to the change of fiber-soil column and formation of effective fiber-soil net.

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