An Empirical Approach for Prediction of Natural Fiber Reinforced Polypropylene Composite Properties

2014 ◽  
Vol 534 ◽  
pp. 69-73
Author(s):  
Ritu Gupta ◽  
Norrozila Sulaiman ◽  
Mohammed Dalour Hossain Beg ◽  
Arun Gupta

In this paper, empirical models are proposed using multiple non linear regressions technique to predict the influence on the Youngs modulus and the tensile strength of the natural fiber reinforced plastic composites (NFRPC). Maleic Anhydride grafted polypropylene (MAPP) has been a proven coupling agent (CA) used to improve the interfacial bonding between the fibers and the plastics material. It is important to include the factor of coupling agent, when making predictions the properties of the composites through the models. For the development of the model, data was collected from various research journals presented in literature. Non linear regression analysis was performed to obtain the empirical model using polymath scientific software. The results were found to be within the acceptable range.

2008 ◽  
Vol 47-50 ◽  
pp. 149-152 ◽  
Author(s):  
Min Zhi Rong ◽  
Su Ping Wu ◽  
Ming Qiu Zhang

In this work, a simple but effective approach was reported for preparing natural fiber reinforced plastic foams based on plant oil with excellent compressive performance and biodegradability. Firstly, epoxidized soybean oil (ESO) was converted into its acrylate ester AESO, which can be free-radically copolymerized with reactive diluents like styrene to give thermosetting resins and their foam plastics. Then the bio-foam composites were produced using short sisal fiber as the reinforcement. Effects of fiber loading, length and surface treatment on properties of the foam composites were investigated. It was found that exposure of the fibers to gas cells of the foam reduced the effectiveness of interfacial effect, which is different from conventional bulk composites. As a result, reinforcing ability of sisal fibers became a function of fiber length, loading, etc. Furthermore, the plastic foams based on plant oil resin were proved to be biodegradable in soil burial or in the presence of fungi.


2011 ◽  
Vol 53 (4) ◽  
pp. 229-232 ◽  
Author(s):  
A. Khalina ◽  
Aidy Ali ◽  
H. Jalaluddin ◽  
M. Z. Hasniza ◽  
W. H. W. M. Haniffah ◽  
...  

Author(s):  
Vishwajith Kaushik R ◽  
Vigneshwaran S ◽  
Joseph S ◽  
Bharath Shakthivel B. R.

Author(s):  
Christian Doersch ◽  
Joerg Muessig ◽  
Dieter H. Mueller

In recent years a growing demand for natural fiber-reinforced plastic components and structures has been observed. One important area of application is transportation, particularly in the automotive industry. Due to market demand, innovative process technologies for fast, cost-effective and quality-driven manufacture of natural fiber-reinforced plastic components is required. This paper will focus on the development of technologies for automised manufacturing of NFRP-components with resin infusion processes. At present NFRP-components are manufactured automatically but without flexibility concerning the deviations of material properties or part geometries. This lack of control in manufacturing results in long cycle times, low process control and high costs. The Bremen Institute for Engineering Design (BIK) is developing and improving machine and process technologies for automised textile handling. The handling system has to meet the requirements of large, limp textile material. The authors have mutually developed methods for the simplified simulation of textiles. The simulation supports the evaluation of textiles and handling devices concerning the ability for better control in manufacturing. To meet these requirements, a simulation of the textile material with the “Finite Element Analysis” method supports the part and process design by reducing developing time and costs. For this purpose, the authors showed a simplified model with a reduced set of material data which is required for the FEA-model.


Author(s):  
Yibin Xue ◽  
Scott A. Fletcher ◽  
Kunpeng Wang

Micromechanics-based simulations were conducted to evaluate the linear and nonlinear properties of natural fiber-reinforced plastic composites with fibers in various waving and kinked forms. Natural fibers, such as woodfibers and fibers from plants, have length-aspect ratio of longitudinal and transverse at or greater than 20. At such high aspect ratio, the natural fiber normally presents in waving, bending, twisting, kinking morphology in the composites. This paper presents a series of micromechanical simulations to predict the elastic and nonlinear elastic behaviors of natural fiber-reinforced plastic composites (NF-PCs) considering the effects of fiber kinking, waving, and arrangements on the stress-strain relationship. A set of three-dimensional unit cells (UC) were developed to mimic various fiber morphologies with the fiber volume fraction of fifty percent, a typical fiber volume fraction for the natural fiber plastic composites. Periodic displacement boundary conditions were implemented on the UC to simulate a unidirectional strain field. The homogenized anisotropic stress-strain relations for NF-PCs were predicted by postulating nonlinear behavior of plastic matrix and perfect and imperfect interface between the NF and the matrix. Stress distributions in the natural fiber were presented as a function of the fiber aspect ratio and the fiber waving and kinking forms. Even though, the high fiber aspect ratio provides relatively high elastic modulus and nonlinear hardening, it also induces high stresses or stress concentration in the fiber that may result in earlier failure of the fiber when the composites undergone a relatively large deformations (> 4%).


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