scholarly journals Investigation of Deformation Analysis of Glass Fiber Reinforced Polymer Injection Molded Component

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Pratik Sonawane ◽  
Mahesh Zope ◽  
Deepti Marathe
Keyword(s):  
Flow Simulation ◽  
Simulation Software ◽  
Fiber Content ◽  
Deformation Analysis ◽  
Polymer Injection ◽  
Factors Affecting ◽  
Molded Part ◽  
Glass Fiber Reinforced ◽  
Predominant Factor ◽  
Injection Molded

Warpage is one of the most crucial problems in injection molded products. Factors affecting warpage include Material, Part geometry, gate location, Fiber content & orientation, temperature, etc. Since many factors cause shrinkage and warpage, it is very difficult to distinguish the predominant factor. In the present study, we have focused on contribution of fiber content on warpage of injection molded part. Basic requirement of the part is flatness at sealing area within given tolerance. The required flatness should be within a given tolerance for effective functioning of the component. Flow simulation software has been used to assess the effect of fiber content on warpage and in turn flatness of the component.

scholarly journals A Sequential Approach for Simulation of Thermoforming and Squeeze Flow of Glass Mat Thermoplastics

2021 ◽  
Author(s):  
Dominik Dörr ◽  
Stanislav Ivanov ◽  
Ryan Gergely ◽  
Nils Meyer ◽  
Frank Henning ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Flow Simulation ◽  
Simulation Software ◽  
Squeeze Flow ◽  
Lagrangian Description ◽  
State Variables ◽  
Sequential Approach ◽  
Glass Fiber Reinforced ◽  
Thermomechanical Simulation ◽  
Glass Mat

In this study, a sequential thermoforming and squeeze flow simulation approach for Glass Mat Thermoplastic (GMT) material is proposed and applied to a hat section geometry using input properties based upon Tepex flowcore, a long glass fiber reinforced polyamide (PA/GF) mat manufactured by Lanxess. First, a fully-coupled thermomechanical simulation is conducted based on a purely Lagrangian description, to efficiently capture thermoforming. Subsequently, relevant state variables are mapped and initialized for a Coupled-Eulerian-Lagrangian (CEL) approach. The CEL approach is adopted to accurately capture squeeze flow, which is not possible by a purely Lagrangian description. While numerical techniques differ, both approaches use the same three-dimensional and thermomechanical constitutive equations including an equation of state, a nonlinear viscosity model, and crystallization kinetics, implemented through a material user-subroutine (VUMAT) for the commercially available simulation software package ABAQUS/Explicit.

scholarly journals Mold-Face Heating Mechanism, Overflow-Well Design, and Their Effect on Surface Weldline and Tensile Strength of Long-Glass-Fiber-Reinforced Polypropylene Injection Molding

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2474 ◽  
Author(s):  
Po-Wei Huang ◽  
Hsin-Shu Peng ◽  
Wei-Huang Choong
Keyword(s):  
Tensile Strength ◽  
Injection Molding ◽  
Structural Strength ◽  
Infrared Heating ◽  
Mold Cavity ◽  
Heating Method ◽  
Molded Part ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber ◽  
Injection Molded

Long-fiber polymers offer the advantage of a lower production cost because specific tool designs are required for conventional injection molding equipment to produce long-fiber polymer parts. The use of long fibers allows relatively high fiber aspect ratios to be obtained, thereby enhancing composite stiffness, strength, creep endurance, and fatigue endurance. However, the multigate design of the injection-molded part can result in weldline formation during the molding process, which reduces the structural strength of the molded part. Therefore, in this study, the surface quality, fiber compatibility, and structural strength of long-glass-fiber-reinforced polypropylene (PP/LGF) injection-molded samples were compared in the use versus nonuse of a mold-cavity overflow-well area and the mold-face infrared heating method. The experimental results indicate that the mold-cavity overflow-well area more greatly improved the surface roughness of the PP/LGF molded samples. Moreover, the infrared heating of the mold-face decreased the weldline depth of the samples. Optical-microscopy images and mold-cavity pressure distributions indicated that the weldline tensile strength and the interface compatibility between fibers and melts at the weldline region during the molding stage were higher in the use than in the nonuse of the mold-cavity overflow-well and mold-face infrared heating method.

Weld line strength factors in a reinforced injection molded part: Relationship with predicted fiber orientation

2019 ◽  
Vol 39 (5-6) ◽  
pp. 219-230
Author(s):  
Maria C Quintana ◽  
Patricia Frontini
Keyword(s):  
Fiber Orientation ◽  
Line Strength ◽  
Weld Line ◽  
Process Condition ◽  
Simulation Software ◽  
Process Conditions ◽  
Significant Variable ◽  
Orientation Factor ◽  
Molded Part ◽  
Injection Molded

In this work, the residual strength of a fiber-reinforced injection molded part containing a hot weld line—or meld line—was evaluated. Injected plates were generated using a double-gated mold under four different process conditions. Quantification of the weld line detrimental effect was made in base on a fracture mechanics experiment. Specimens with and without the weld line—obtained from the same plates—were tested under a clamped single edge notched tension (SENT) configuration. For each set of process conditions, a relative weld line strength factor was defined in terms of the maximum applied stress intensity factor (KImax) as: KImax of specimens with weld line/KImax of specimens without weld line. In parallel, the fiber distribution pattern was obtained by process simulation software Moldex3D. An orientation factor was determined from simulation in order to quantify the effect of the local fiber orientation around the weld line. Optimal process condition and the most significant variable influencing the weld line strength were calculated via statistical analysis. Results showed a clear correlation between the weld line strenght factors and the orientaion factor. It was demonstrated that the fracture performance of the weld line region is controlled by the fiber orientation arrangement developed on that zone.

Computer Simulation of an Engine Environmental Control System

2013 ◽  
Vol 850-851 ◽  
pp. 355-358
Author(s):  
Dong Du
Keyword(s):  
Control System ◽  
Distribution System ◽  
Environmental Control ◽  
Cooling System ◽  
Flow Simulation ◽  
Aircraft Engine ◽  
Simulation Software ◽  
Temperature Decrease ◽  
Environmental System ◽  
Passenger Aircraft

This paper describes the use of Fluid Flow Simulation Software to model a passenger aircraft engine environmental control system. The analysis simulates the cooling pack and the engine distribution system in a single model.The engine environmental system is very important for engine working efficiently. Using AMEsim software to simulate the cooling system can make it easily and clearly. The influence of the heat component and the fan operating is studied also. Through the analysis of the cooling system, we know that with the help of fan, the system can get additional air in the radiator and make the temperature decrease consequently.

Future Directions in Instrumentation, Control and Automation in the Water and Wastewater Industry

1993 ◽  
Vol 28 (11-12) ◽  
pp. 9-14 ◽  
Author(s):  
Troy D. Vassos
Keyword(s):  
Control Strategies ◽  
Treatment Plant ◽  
Dynamic Modelling ◽  
Simulation Software ◽  
Plant Performance ◽  
Limiting Factors ◽  
Time Data ◽  
Training Environment ◽  
Factors Affecting ◽  
Water And Wastewater

The need to optimize treatment plant performance and to meet increasingly stringent effluent criteria are two key factors affecting future development of instrumentation, control and automation (ICA) applications in the water and wastewater industry. Two case studies are presented which highlight the need for dynamic modelling and simulation software to assist operations staff in developing effective instrumentation control strategies, and to provide a training environment for the evaluation of such strategies. One of the limiting factors to date in realizing the potential benefits of ICA has been the inability to adequately interpret the large number of existing instrumentation inputs available at treatment facilities. The number of inputs can exceed the number of control loops by up to three orders of magnitude. The integration of dynamic modelling and expert system software is seen to facilitate the interpretation of real-time data, allowing both quantitative (instrumented) and qualitative (operator input) information to be integrated for process control. Improvements in sensor reliability and performance, and the development of biological monitoring sensors and control algorithms are also discussed.

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