Experimental investigation on the dynamic response of additive manufactured PETG composite beams reinforced with organically modified montmorillonite nanoclay and short carbon fiber

This work aims to explore the effect of organo-modified montmorillonite nanoclay (O-MMT) on the mechanical, thermo-mechanical, and thermal properties of carbon fiber-reinforced phenolic composites (CFRP). CFRP at variable O-MMT contents (from 0 to 2.5 wt%) were prepared. The addition of 1.5 wt% O-MMT was found to give the heat resistant polymer composite optimum properties. Compared to the CFRP, the CFRP with 1.5 wt% O-MMT provided a higher tensile strength of 64 MPa (+20%), higher impact strength of 49 kJ/m2 (+51%), but a little lower bending strength of 162 MPa (−1%). The composite showed a 64% higher storage modulus at 30 °C of 6.4 GPa. It also could reserve its high modulus up to 145 °C. Moreover, it had a higher heat deflection temperature of 152 °C (+1%) and a higher thermal degradation temperature of 630 °C. This composite could maintain its mechanical properties at high temperature and was a good candidate for heat resistant material.

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Effect of short carbon fiber content on the mechanical properties of TiB 2 ‐based composites prepared by spark plasma sintering

International Journal of Applied Ceramic Technology ◽

10.1111/ijac.13779 ◽

2021 ◽

Author(s):

Fateme Ghafuri ◽

Rahmatollah Emadi ◽

Mehdi Ahmadian ◽

Mohammad Zakeri

Keyword(s):

Mechanical Properties ◽

Carbon Fiber ◽

Spark Plasma Sintering ◽

Fiber Content ◽

Short Carbon Fiber ◽

Plasma Sintering ◽

Spark Plasma ◽

Short Carbon

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

Journal of Materials Engineering and Performance ◽

10.1007/s11665-021-05659-7 ◽

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.

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