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纳米力学科学与技术:国际期刊

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ISSN 打印: 2572-4258

ISSN 在线: 2572-4266

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.7 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00023 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.11 SJR: 0.244 SNIP: 0.521 CiteScore™:: 3.6 H-Index: 14

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FABRICATION AND CHARACTERIZATION OF POLYVINYL ALCOHOL INFILTRATED POLYURETHANE FOAMS FOR ENERGY ABSORPTION APPLICATIONS

卷 10, 册 2, 2019, pp. 157-168
DOI: 10.1615/NanoSciTechnolIntJ.2019031314
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摘要

The present research is aimed at fabricating and characterizing PU/PVA composites. This is achieved through partial infiltration of PU foam with PVA solution in varying wt.% (1, 5, and 10). The PVA infiltrated PU foam samples are freezed followed by freeze drying. The PVA infiltration leads to a rise in the density conforming partial infiltration of PVA to PU foam. The microstructure and compressive mechanical properties of PVA infiltrated PU foam is compared with a neat PU foam. The microstructure of a PVA infiltrated PU foam shows hierarchical microstructure with small pores of PVA (40–50 μm) engulfed within larger pores of PU foam (500–600 μm). The uniaxial multiple cycle compression tests are carried out at a strain rate of 0.02 s–1. The specific elastic modulus, specific plateau stress, and specific densification showed a rise of 41%, 17%, and 5% for 1 wt.% with respect to the neat PU foam sample. A 1 wt.% PVA infiltrated sample shows the energy loss coefficient comparable to the neat PU foam during each cycle. This can be attributed to formation of stiffer cell walls with PVA infiltration. The peak efficiency parameter, indicating the absorbed energy normalized with peak stress shows an increase of 5% that to even at stress values similar for the neat PU foam sample.

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