Fiber Orientation and Strain Rate-Dependent Tensile and Compressive Behavior of Injection Molded Polyamide-6 Reinforced with 20% Short Carbon Fiber

Abstract

As the interest in short-fiber reinforced polymer (SFRP) composites manufactured by injection molding increases, predicting the failure of SFRP structures becomes important. This study aims to systemize the prediction of failure of SFRP through mechanical property evaluation considering the anisotropy and strain rate dependency. To characterize the mechanical properties of polyamide-6 reinforced with carbon fiber of a weight fraction of 20% (PA6-20CF), tensile and compressive experiments were conducted with different load-applying directions and strain rates. Additionally, the results were discussed in detail by SEM image analysis of the fracture faces of the specimen. FE simulations based on the experimental condition were constructed, and the numerical model coefficients were derived through comparison with experimental results. The coefficients obtained were verified by bending tests of the specimens manufactured from composite cross members fabricated by injection molding. Predicting under static and high strain rate conditions, small errors of about 9.6% and 9.3% were shown, respectively. As a result, it proves that explained procedures allow for better failure prediction and for contribution to the systematization of structural design.

Design and analysis of three-dimensional braiding machine with track change interlocking

“…[1][2][3] Braided fabric are suitable for onetime forming of complicated structures, with changeable cross-section characteristics, impact resistance and creep resistance, 4,5 and have been widely used in automotive, aviation, wind turbine blades and other areas. [6][7][8][9] Due to braiding's higher levels of conformability and structural integrity, three-dimensional braided composites offer superior impact damage tolerance than flat braided composites. 10,11 Threedimensional braiding is a type of braided preforms, which the horn gear move two sets of carriers in opposite direction, so that the yarns interlace to form perfect braided structure.…”

Waste Management after the Injection Process by Manufacturing Polyamide Products Based on Regranulate

“…A cold runner in the injection mold type is shown in Figure 1. The function of t is to deliver the plasticized material to the cavities to produce the finishe Short-fiber-reinforced thermoplastic polymers are often used in industry d riety, recyclability, and low cost and cycle times associated with the inje process [17]. The characteristic waste of a runner in a cold runner system is ure 2.…”

Single and Multiple Gate Design Optimization Algorithm for Improving the Effectiveness of Fiber Reinforcement in the Thermoplastic Injection Molding Process

“…Another important aspect relevant to all fibers-reinforced composites (FRC), which also applies to the TIM process, is the influence of the fiber orientation distribution (FOD) on the mechanical performance of the component. As shown in recent literature studies, the FOD affects the static strength and fatigue life [ 11 , 12 , 13 ], the effect of the stress triaxiality and loading conditions on the failure behavior [ 14 , 15 , 16 ], and notch sensitivity [ 17 , 18 ].…”