Mechanical ageing protocol selection affects macroscopic performance and molecular level properties of ethylene vinyl acetate (EVA) running shoe midsole foam

被引：10

作者：

Lippa, Nadine ^{[1
,2
]}

Hall, Elise ^{[3
]}

Piland, Scott ^{[2
]}

Gould, Trent ^{[2
]}

Rawlins, James ^{[1
]}

机构：

[1] Univ So Mississippi, Sch Polymers & High Performance Mat, Hattiesburg, MS 39406 USA

[2] Univ So Mississippi, Sch Human Performance & Recreat, Hattiesburg, MS 39406 USA

[3] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA

来源：

ENGINEERING OF SPORT 10 | 2014年 / 72卷

关键词：

Footwear; Running; Cyclic Protocol; Mechanical Ageing; Foams; ENVIRONMENTAL-TEMPERATURE; PV MODULES; ENCAPSULANT;

D O I：

10.1016/j.proeng.2014.06.082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Existing attempts to evaluate footwear via cyclic compression fail to sufficiently represent biofidelic force-time curves or provide the underlying mechanism of EVA foam fatigue. A uniaxial biofidelic waveform was compared to a sine wave of the same frequency to examine differences in (1) net displacement, (2) absorbed energy, and (3) peak force from ASTM F1614. A non-destructive molecular-level technique (ATR-FTIR) recorded differences in hydroxyl, ester, and unsaturated moieties due to EVA degradation. It was concluded that (1) biofidelic waveforms may better simulate human running, (2) material degradation is discernible, and (3) inferences regarding polymeric degradation and macroscopic performance require further investigation. (C) 2014 Elsevier Ltd.

引用

页码：285 / 291

页数：7

共 21 条

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