Bead optimization in long fiber reinforced polymer structures: Consideration of anisotropic material properties resulting from the manufacturing process

2020 ◽  
Vol 149 ◽  
pp. 102891
Author(s):  
Sven Revfi ◽  
Marvin Mikus ◽  
Kamran Behdinan ◽  
Albert Albers
Keyword(s):  
Material Properties ◽  
Anisotropic Material ◽  
Manufacturing Process ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Reinforced Polymer

Characterizing Interphase Properties in Fiber Reinforced Polymer Composite with Advanced AFM Based Tools

2010 ◽  
Vol 123-125 ◽  
pp. 403-406 ◽  
Author(s):  
Si Qun Wang ◽  
San Deep Nair ◽  
Donna Hurley ◽  
Seung Hwan Lee
Keyword(s):  
Material Properties ◽  
Fiber Reinforced Polymer ◽  
Phase Imaging ◽  
Fiber Reinforced ◽  
Scanning Thermal Microscopy ◽  
Maleated Polypropylene ◽  
Force Microscopy ◽  
Reinforced Polymer ◽  
Microscopy Techniques ◽  
Contact Resonance

Advanced atomic force microscopy techniques such as contact resonance force microscopy, noncontact mode phase imaging, and scanning thermal microscopy techniques have been used to characterize material properties in the interphase of fiber reinforced polymer composites. With contact resonance force microscopy, the average interphase thickness was found to be (49 ± 5) nm, (64 ± 12) nm, and (139 ± 21) nm for samples containing lyocell fibers in matrix materials consisting of 100 % polypropylene (PP)/0 % maleated polypropylene (MAPP), 95 % PP/5 % MAPP, and 90 % PP/10 % MAPP, respectively. Clear distinctions in modulus values between the fiber, interphase zone, and matrix are clearly visible in modulus images. A gradient of modulus was observed across the interphase region that ranged between the modulus values of fiber and the polymer matrix. Noncontact mode images showed a clear phase difference between the fiber, interphase, and matrix owing to the difference in material properties between the components. Interphase regions were observed to possess higher thermal conductivity than the matrix polymer due to cross-linking within the interphase.

Buckling Analysis of Pultruded Fiber Reinforced Polymer Plastic Plate: Application of Simplified Buckling Analysis

2017 ◽  
Vol 753 ◽  
pp. 103-108
Author(s):  
Jong Ho Yoo ◽  
Sun Hee Kim ◽  
Won Chang Choi ◽  
Soon Jong Yoon
Keyword(s):  
Material Properties ◽  
Orthotropic Material ◽  
Geometric Mean ◽  
Buckling Analysis ◽  
Fiber Reinforced Polymer ◽  
Analysis Method ◽  
Fiber Reinforced ◽  
Buckling Strength ◽  
Advantages And Disadvantages ◽  
Reinforced Polymer

The pultruded fiber reinforced polymer plastic (PFRP) is one of the most actively studied materials for structural member in construction industries. In this study, a buckling analysis of PFRP plate is conducted by two analysis methods. First, a buckling strength of PFRP plate is calculated by the exact orthotropic plate buckling analysis. Second, simplified buckling analysis for PFRP plate is conducted by using approximate orthotropic material properties. The approximate orthotropic material properties are geometric mean value of longitudinal and transverse material properties of original PFRP plate. As a result of buckling analysis, buckling strength of PFRP plate for each analysis method can be obtained. From the comparison between these results, advantages and disadvantages of each analysis method are discussed. In addition, it is also discussed whether the simplified buckling analysis method for PFRP plate is applicable for the design.

Tensile properties of CFRP manufactured by resin transfer molding considering stacking sequences at various strain rates

2019 ◽  
Vol 53 (14) ◽  
pp. 2015-2030 ◽  
Author(s):  
Jesung Yoo ◽  
Hoon Huh ◽  
Jaeyoung Lim ◽  
Taehwa Lee
Keyword(s):  
Carbon Fiber ◽  
Tensile Test ◽  
Material Properties ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Strain Rates ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced ◽  
Auto Body

This paper is concerned with the improvement of a tensile test method and the material properties of carbon fiber reinforced polymer manufactured by resin transfer molding considering stacking sequences at various strain rates for auto-body. Auto-body structure experiences the strain rates up to several hundreds per second during car crash. In order to apply the carbon fiber reinforced polymer panel into auto-body structures, it is critical to acquire the material properties of carbon fiber reinforced polymer at various strain rates considering stacking sequences. The tensile test method is improved for acceptable test results. Test specimens are modified for high-speed tensile tests of carbon fiber reinforced polymer in order to achieve designated strain rates and eliminate the effect from unfavorable conditions of inhomogeneity of deformation. Various types of grip tab materials are employed for acceptable failure modes. Tensile tests have been carried out with non-crimp fabric made by 50K high strength carbon fiber (NCF) and woven fabric made by a 2/2 twill pattern of 3K high strength carbon fiber (TWILL) with different stacking sequences of 0° and 90° unidirectional cases as well as [0°/90°] and [45°/−45°] symmetric cases. Digital image correlation method and force equilibrium grid method are adopted for strain and stress measurement of a carbon fiber reinforced polymer specimen during a tensile test. The material properties acquired indicate that the carbon fiber has little rate dependency, while the epoxy matrix has remarkable rate hardening at strain rates from 0.001 s−1 to 100 s−1.

Experimental Study on the Durability of Glass Fiber Reinforced Polymer Pole and Tower for Power Transmission

2010 ◽  
Vol 168-170 ◽  
pp. 1717-1724 ◽  
Author(s):  
Ling Ling Zhang ◽  
Qing Sun ◽  
Ling Zhang
Keyword(s):  
Glass Fiber ◽  
Material Properties ◽  
Power Transmission ◽  
Protective Coatings ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Temperature Environment

This paper studied the durability of Glass Fiber Reinforced Polymer (GFRP) Pole and Tower for power transmission under the UV and adverse temperature environment. The results show that both UV and adverse temperature environment influence the performance of GFRP material, with its strength significantly reduced, and its elastic modulus increased, while the Poisson's ratio changed slightly. Xenon lamp aging affects the material properties of the specimens with protective coatings more slightly than those without any protective coatings. High temperature environment affects the material properties of specimens more obviously than low temperature environment does. Therefore, when designing the GFRP Pole and Tower for power transmission exposed in UV and adverse temperature environment long-term, designers should consider the negative impacts of the external environment, and take appropriate protective treatments.

scholarly journals On Complexities of Impact Simulation of Fiber Reinforced Polymer Composites: A Simplified Modeling Framework

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
M. Alemi-Ardakani ◽  
A. S. Milani ◽  
S. Yannacopoulos
Keyword(s):  
Polymer Composites ◽  
Material Properties ◽  
Fiber Reinforced Polymer ◽  
Impact Response ◽  
Dynamic Force ◽  
Fiber Reinforced ◽  
Modeling Framework ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Simplified Modeling

Impact modeling of fiber reinforced polymer composites is a complex and challenging task, in particular for practitioners with less experience in advanced coding and user-defined subroutines. Different numerical algorithms have been developed over the past decades for impact modeling of composites, yet a considerable gap often exists between predicted and experimental observations. In this paper, after a review of reported sources of complexities in impact modeling of fiber reinforced polymer composites, two simplified approaches are presented for fast simulation of out-of-plane impact response of these materials considering four main effects: (a) strain rate dependency of the mechanical properties, (b) difference between tensile and flexural bending responses, (c) delamination, and (d) the geometry of fixture (clamping conditions). In the first approach, it is shown that by applying correction factors to the quasistatic material properties, which are often readily available from material datasheets, the role of these four sources in modeling impact response of a given composite may be accounted for. As a result a rough estimation of the dynamic force response of the composite can be attained. To show the application of the approach, a twill woven polypropylene/glass reinforced thermoplastic composite laminate has been tested under 200 J impact energy and was modeled in Abaqus/Explicit via the built-in Hashin damage criteria. X-ray microtomography was used to investigate the presence of delamination inside the impacted sample. Finally, as a second and much simpler modeling approach it is shown that applying only a single correction factor over all material properties at once can still yield a reasonable prediction. Both advantages and limitations of the simplified modeling framework are addressed in the performed case study.

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