Characterization of a New Fully Recycled Carbon Fiber Reinforced Composite Subjected to High Strain Rate Tension

Abstract

The aim of this study is the complete physicochemical characterization and strain rate effect multi-scale analysis of a new fully recycled carbon fiber reinforced composites for automotive crash application. Two composites made of 20% wt short recycled carbon fibers (CF) are obtained by injection molding. The morphology and the degree of dispersion of CF in the matrixes were examined using a new ultrasonic method and SEM. High strain tensile behavior up to 100 s-1 is investigated. In order to avoid perturbation due to inertial effect and wave propagation, the specimen geometry was optimized. The elastic properties appear to be insensitive to the strain rate. However, a high strain rate effect on the local visco-plasticity of the matrix and fiber/matrix interface viscodamageable behavior is emphasized. The predominant damage mechanisms evolve from generalized matrix local ductility at low strain rate regime to fiber/matrix interface debonding and fibers pull-out at high strain rate regime.

Thermal aging kinetic and effects on mechanical behavior of fully recycled composite based on polypropylene/polyethylene blend

“…Dynamic tests were realized at 10 s −1 strain rate using a servo‐hydraulic test machine (Schenck) equipped with a high speed camera (FASTCAM‐APX RS) with the capacity of 250,000 frames per second to be able to record the pictures during high speed tensile test. The geometry of the specimen was optimized using ABAQUS finite element code in order to obtain a homogeneous strain distribution and a continued strain rate in the specimen's effective zone . The quasi‐static tests were performed at 10 −2 s −1 , using INSTRON tensile‐compression electromechanical device on specimen respecting ISO 527‐2:1996 type 5A.…”

“…The geometry of the specimen was optimized using ABAQUS finite element code in order to obtain a homogeneous strain distribution and a continued strain rate in the specimen's effective zone. 20 The quasi-static tests were performed at 10 22 s 21 , using INSTRON tensile-compression electromechanical device on specimen respecting ISO 527-2:1996 type 5A.…”

Multi‐scale analysis of short glass fiber‐reinforced polypropylene under monotonic and fatigue loading

“…The ultrasonic wave propagation measurement is used to characterize the orientation and spatial distribution in a short glass reinforced composite plate. Indeed, several authors [34,35] used an innovative ultrasonic immersion method to characterize the fiber orientation of short fiber-reinforced polymers. Here, the same characterization method is used.…”

Thermal aging influence on the damage mechanisms of fully recycled composite‐reinforced polypropylene/polyethylene blend

“…The composite was elaborated by compounding the RPP granulates and 20% wt fibers using a twin screw extruder Haake Termo PTW 16 -40D. The extruder was operating at a total throughput of 700 g/h with a screw speed of 150 rpm and a die temperature of 210 C. Once the RPP-CF 180 compound was made, it was transferred into an injection molding machine to obtain rectangular plates of 2.5-mm thickness [22]. Microscopic investigation of the composite microstructure was performed using SEM (see Fig.…”

“…SEM observations reveal a microstructure carracterized by a shell–core layer formation through the material thickness. Such microstuctrure is frequent for thermoplastic composite elaborated by injection molding process . The shell layers are characterized by oriented fibers in the same mold flow direction (MFD) and are the most dominant with 85% of the plate thickness.…”