Strain-hardening during compression of closed-cell Al/Si/SiC + (TiB2 &amp; Mg) foam

Bayani, Hossein; Mirbagheri, S. M. H.

doi:10.1016/j.matchar.2016.01.017

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…The E max / E lin values can be used to evaluate the degree of strain-hardening. 31,32 Figure 8c shows that PORON XRD has the largest degrees of strain-hardening at high strain rates, and both PORON XRD and D3O have larger degrees of strain-hardening than DEFLEXION. Overall, it can be concluded that the strain rate shows obvious effects on the degree of strain-hardening for D3O and PORON XRD, and PORON XRD possesses the highest degree of strain-hardening when subjected to the highest strain rate as applied in this study.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, it can be seen from Figure b that DEFLEXION has the highest E max values, PORON XRD has the lowest E max values, and D3O has intermediate E max values at low strain rates; however, the E max values for PORON XRD increase with an increasing strain rate and eventually become significantly higher than those for D3O and DEFLEXION at the highest two strain rates as applied in the study, possibly associated with the added SiO 2 fillers in PORON XRD. The E max / E lin values can be used to evaluate the degree of strain-hardening. , Figure c shows that PORON XRD has the largest degrees of strain-hardening at high strain rates, and both PORON XRD and D3O have larger degrees of strain-hardening than DEFLEXION. Overall, it can be concluded that the strain rate shows obvious effects on the degree of strain-hardening for D3O and PORON XRD, and PORON XRD possesses the highest degree of strain-hardening when subjected to the highest strain rate as applied in this study.…”

Section: Resultsmentioning

confidence: 99%

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Dependences of Rheological and Compression Mechanical Properties on Cellular Structures for Impact-Protective Materials

et al. 2017

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In this study, three typical impact-protective materials, D3O, PORON XRD, and DEFLEXION were chosen to explore the dependences of rheological and compression mechanical properties on the internal cellular structures with polymer matrix characteristics, which were examined using Fourier transform infrared spectroscopy, thermogravimetric analyses, and scanning electron microscopy with energy dispersive spectroscopy. The rheological property of these three foaming materials were examined using a rheometer, and the mechanical property in a compression mode was further examined using an Instron universal tensile testing machine. The dependences of rheological parameters, such as dynamic moduli, normalized moduli, and loss tangent, on angular frequency, and the dependences of mechanical properties in compression, such as the degree of strain-hardening, hysteresis, and elastic recovery, on the strain rate for D3O, PORON XRD, and DEFLEXION can be well-correlated with their internal cellular structural parameters, revealing, for example, that D3O and PORON XRD exhibit simultaneously high strength and great energy loss in a high-frequency impact, making them suitable for use as soft, close-fitting materials; however, DEFLEXION dissipates much energy whether it suffers a large strain rate or not, making it suitable for use as a high-risk impact-protective material. The rheometry and compression tests used in this study can provide the basic references for selecting and characterizing certain impact-protective materials for applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Dependences of Rheological and Compression Mechanical Properties on Cellular Structures for Impact-Protective Materials

et al. 2017

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“…The third part of the curve is the densification region, which starts immediately after the second stage and the amount of stress after the densification point increases exponentially and becomes asymptotic to the vertical strain line as like the mIR model. [ 17 ] This region can be seen in Figure 4, at 65% up to 80% strains. Another noteworthy point is the synchrony of the true and engineering stress–strain curves of both 3D‐RP and 3D‐RP‐Ni samples, which shows a perfect similarity two kinds of samples up to the initial densification point.…”

Section: Resultsmentioning

confidence: 83%

Section: Compressive Behavior and Fracture Mechanismmentioning

confidence: 78%

“…The yellow zone shows that all samples break at about 45 angles. [ 17 ] It is obvious that the principal frames (see Figure 2f) in the core are narrow columns perpendicular to upper and bottom panels, resistant to buckling and deformation, and lead to fractures in other directions. However, the shear stress should be the reason for the oblique fracture.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of Energy Absorption Behavior of Light Sandwich Panel with Nickel/Polymer Open‐Cell Foam Core during Compression

et al. 2022

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This investigation aims to assess the mechanical behavior and energy absorption properties of the light sandwich panels made of open‐cell polymer and nickel/polymer foam. A portion of the ultralightweight foam sandwich panels (14.23 g) is produced by 3D printing and electrodeposition methods with 35, 45, and 55 seeds numbers, which lead to 4, 5, and 6 pores per inch (PPI); then a uniaxial compression test is applied to measure maximum compressive strength, strength‐to‐weight ratio, energy absorption density, efficiency, and complementary energy. The results indicate that compared with typical open‐cell nickel foams and polymer precursors when the thickness of the nickel layer is about 50 micrometers, the aforementioned properties of the sandwich panel shows a significant improvement. Improvement of properties changes by increasing PPI and CAD seed numbers. In a nickel/polymer sandwich panel with 6 PPI, the first maximum compressive strength, specific energy absorption, and energy absorption efficiency reach 0.93 (MPa), 0.93 (J.boldg−1), and 60%, respectively. 3D‐RP‐Ni‐6 improves 3D‐RP‐6 first maximum compressive strength and specific energy absorption by six times and two times, respectively. These significant improvements in the properties of these sandwich panels make these advanced materials a suitable candidate for the high strength applications.

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