Experimental and numerical characterization of a polymeric Hopkinson bar by DTMA

Sasso, M.; Antonelli, Michele Gabrio; Mancini, Edoardo; Radoni, Mario; Amodio, D.

doi:10.1016/j.ijimpeng.2016.12.020

Cited by 26 publications

(11 citation statements)

References 31 publications

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“…Quasi-static compression tests were performed by using an electro-mechanical tensile machine (Zwick/Roell Z050, Genova, Italy), while dynamic compression tests were performed by using the self-designed SHB facility installed at Università Politecnica delle Marche (Ancona, Italy) [ 29 , 30 ] ( Figure 2 ). The quasi-static tests were conducted at a strain rate of 10 −3 s −1 , whereas dynamic tests were conducted at approximately 3·10 2 s −1 .…”

Section: Methodsmentioning

confidence: 99%

Failure Mechanisms of an Al 6061 Alloy Foam under Dynamic Conditions

et al. 2021

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The interesting properties of Al 6061 aluminum foams have boosted the research on the correlation between foam composition and morphology and its mechanical response under dynamic conditions. In this study, ingots of an Al 6061-T4 foam were sectioned and analyzed in order to determine their microstructural and morphological characteristics, and then quasi-static and dynamic tests (10−3 to 3 × 102 s−1) were carried out to determine the material mechanical behavior. Dynamic tests, carried out by using the split Hopkinson bar, highlighted that the studied foam is characterized by a very good energy absorption capability, due to its ductile behavior. Nevertheless, the conducted research showed that cell morphology and distribution affect its mechanical behavior in dynamic conditions in which localized cell collapse may result in a decreased energy absorption and efficiency of the foam.

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Section: Methodsmentioning

confidence: 99%

Failure Mechanisms of an Al 6061 Alloy Foam under Dynamic Conditions

et al. 2021

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“…Then, a composite sandwich beam with a 3D printed core was manufactured to verify the proposed model consistency. The model consistency was verified also through a comparison in terms of strain maps through a DIC analysis carried out on the core lateral side [14].…”

Section: Introductionmentioning

confidence: 93%

Influence of Core Cellular Structures on Collapse Mechanisms Maps of Sandwich Beams

Utzeri

Morichelli

Lattanzi

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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The main advantage of 3D printing is manufacturing complex and innovative shapes which guarantee high mechanical properties. Therefore, it is necessary easily figure out the most suitable structure for the required design requirements. The well-known strategy to design sandwich panels is evaluating collapse maps as they determine the panel performances based on their geometrical features. The aim of this study is to update the traditional collapse maps by showing how the core shape can improve the sandwich beam performance. The collapse maps proposed are based on advanced analytical models than the traditional Gibson theories. The analytical modelling of the indentation phenomenon is based on Vlasov’s model. The analytical modelling of the bending phenomenon is based on the First Shear Order Theory. The overall panel stress and strain maps are computed superposing both effects. A composite sandwich panels with Gyroid core based are analyzed to verify the proposed model consistency. A core failure criterion is chosen by experimental testing evidence on the representative core structure. Once the computed stress state overtakes failure criterion ones, the critical load is defined. In the end, the model is exploited to compare the performances of four sandwich panels with cores based on different lattice structures.

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“…Voltage signals are acquired by a 16-bit DAQ card (NI© PCI-6120) and then converted to strains. Further details of this SHB device and applications can be found in [23,[26][27][28].…”

Section: Compression Testsmentioning

confidence: 99%

High strain rate compression behaviour of 3D printed Carbon-PA

Utzeri

Farotti

Coccia

et al. 2021

Journal of Materials Research

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In the last few years, Fused Filament Fabrication is growing in the industrial field for the manufacture of final products by using new materials with high mechanical performances. Among those, one of the strongest is Carbon-PA. This is a composite material made by Nylon thermoplastic matrix filled with short carbon fibers reinforces. The aim of this work is to investigate its mechanical properties in static and dynamic conditions. Cylindrical specimens were produced by extruding the material in the three main printing directions. Then, uniaxial quasi-static and dynamic compression tests have been performed to evaluate its strain rate sensitivity. Dynamic tests have been carried out through a direct Split Hopkinson Bar setup with a pulse-shaping technique. The results show a compression behaviour dependent on the printing direction and strain rate. The behaviour of Carbon-PA was different between static and dynamic condition, passing from ductile to brittle. Moreover, a tomography analysis was carried out on the samples to evaluate the voids distribution. Graphic abstract

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Experimental and numerical characterization of a polymeric Hopkinson bar by DTMA

Cited by 26 publications

References 31 publications

Failure Mechanisms of an Al 6061 Alloy Foam under Dynamic Conditions

Failure Mechanisms of an Al 6061 Alloy Foam under Dynamic Conditions

Influence of Core Cellular Structures on Collapse Mechanisms Maps of Sandwich Beams

High strain rate compression behaviour of 3D printed Carbon-PA

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