Temperature Effect on Fatigue Crack Propagation in Short Carbon-Fiber Reinforced PPS

2016 ◽  
Vol 2016 (0) ◽  
pp. OS02-11
Author(s):  
Keisuke TANAKA ◽  
Kazuya OHARADA ◽  
Yuya HASEGAWA ◽  
Taiki YAMADA ◽  
Kenichi SHIMIZU
Keyword(s):  
Fatigue Crack ◽  
Carbon Fiber ◽  
Crack Propagation ◽  
Temperature Effect ◽  
Fatigue Crack Propagation ◽  
Fiber Reinforced ◽  
Short Carbon Fiber ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

scholarly journals Temperature effect on fatigue crack propagation in short-carbon-fiber reinforced PPS

2017 ◽  
Vol 83 (847) ◽  
pp. 16-00503-16-00503
Author(s):  
Keisuke TANAKA ◽  
Kazuya OHARADA ◽  
Yuya HASEGAWA ◽  
Kenichi SHIMIZU
Keyword(s):  
Fatigue Crack ◽  
Carbon Fiber ◽  
Crack Propagation ◽  
Temperature Effect ◽  
Fatigue Crack Propagation ◽  
Fiber Reinforced ◽  
Short Carbon Fiber ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

scholarly journals Effect of Thickness on Fatigue Crack Propagation in Injection Molded Short Carbon Fiber Reinforced Plastics

2018 ◽  
Vol 165 ◽  
pp. 07002 ◽  
Author(s):  
Kenichi Shimizu ◽  
Yuya Hasegawa ◽  
Keisuke Tanaka
Keyword(s):  
Carbon Fiber ◽  
Crack Propagation ◽  
Crack Opening Displacement ◽  
Crack Opening ◽  
Plate Thickness ◽  
Fiber Reinforced ◽  
Opening Displacement ◽  
Short Carbon Fiber ◽  
Carbon Fiber Reinforced ◽  
Short Carbon

The influence of plate thickness on the fatigue crack propagation behavior was studied by using center-notched specimens which were cut from injection-molded plates of short carbon-fiber reinforced polyphenylene sulfide (PPS) at two fiber angles relative to the molding flow direction (MFD), i. e. θ=0 deg. (MD), 90 deg. (TD). The short carbon-fiber reinforced plastics (SCFRP) plates have three-layer structure where the fiber orientation is parallel to MFD in the shell layer and is nearly perpendicular in the core layer. The fraction of the core layer increases with increase in the plate thickness. In the relation between the crack propagation rate, da/dN, and stress intensity factor, ΔK, da/dN increases with increase in thickness for MD specimen. Conversely, da/dN decreases for TD specimen. The crack opening displacement along the crack was measured by using the digital image correlation (DIC) method. The measured crack opening displacement become larger with increase in the plate thickness for MD specimens. Contrary, measured values become smaller with increase in the plate thickness for TD specimen. The crack-tip-opening radius, Δρ, was estimated from the parabolic approximation of the crack opening displacement distribution near the crack tip. The relationships between da/dN and Δρ for all specimens tend to merge into a unique relationship.

scholarly journals Effect of Geometric Parameters and Moisture Content on the Mechanical Performances of 3D-Printed Isogrid Structures in Short Carbon Fiber-Reinforced Polyamide

2021 ◽  
Author(s):  
Valerio Di Pompeo ◽  
Archimede Forcellese ◽  
Tommaso Mancia ◽  
Michela Simoncini ◽  
Alessio Vita
Keyword(s):  
Carbon Fiber ◽  
Moisture Content ◽  
Geometric Parameters ◽  
Fiber Reinforced ◽  
Compression Tests ◽  
Short Carbon Fiber ◽  
3D Printed ◽  
Carbon Fiber Reinforced ◽  
Mechanical Performances ◽  
Short Carbon

AbstractThe present paper aims at studying the effect of geometric parameters and moisture content on the mechanical performances of 3D-printed isogrid structures in short carbon fiber-reinforced polyamide (namely Carbon PA). Four different geometric isogrid configurations were manufactured, both in the undried and dried condition. The dried isogrid structures were obtained by removing the moisture from the samples through a heating at 120 °C for 4 h. To measure the quantity of removed moisture, samples were weighted before and after the drying process. Tensile tests on standard specimens and buckling tests on isogrid panels were performed. Undried samples were tested immediately after 3D printing. It was observed that the dried samples are characterized by both Young modulus and ultimate tensile strength values higher than those provided by the undried samples. Similar results were obtained by the compression tests since, for a given geometric isogrid configuration, an increase in the maximum load of the dried structure was detected as compared to the undried one. Such discrepancy tends to increase as the structure with the lowest thickness value investigated is considered. Finally, scanning electron microscopy was carried out in order to analyze the fractured samples and to obtain high magnification three-dimensional topography of fractured surfaces after testing.

Sign in / Sign up

Export Citation Format

Share Document