Fatigue and fracture of foam cores used in sandwich composites.

机译：夹芯复合材料中使用的泡沫芯的疲劳和断裂。

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This study focused on the fracture and fatigue crack growth behavior in polyvinylchloride (PVC) and polyethersulfone (PES) foams. A new sandwich double cantilever beam (DCB) test specimen was implemented. Elastic foundation and finite element analysis and experimental testing confirmed that the DCB specimen is appropriate for static and cyclic crack propagation testing of soft polymer foams. A comprehensive experimental mechanical analysis was conducted on PVC foams of densities ranging from 45 to 100 kg/m3 and PES foams of densities ranging from 60 to 130 kg/m3. An in-situ scanning electron microscope study on miniature foam fracture specimens showed that crack propagation in the PVC foam was inter-cellular and in the PES foam, failure occurred predominately by extensional failure of vertical cell edges. Sandwich DCB specimens were loaded cyclically as well. For the PVC foams, the crack growth rates were substantially influence by the density. For the PES foams, there was no clear indication about the influence of foam density on the crack growth rate.

机译：这项研究的重点是聚氯乙烯（PVC）和聚醚砜（PES）泡沫的断裂和疲劳裂纹扩展行为。实施了新的夹层双悬臂梁（DCB）测试样品。弹性基础和有限元分析以及实验测试证实，DCB试样适用于软质聚合物泡沫的静态和循环裂纹扩展测试。对密度范围为45至100 kg / m3的PVC泡沫和密度范围为60至130 kg / m3的PES泡沫进行了全面的实验力学分析。对微型泡沫破裂样品的原位扫描电子显微镜研究表明，PVC泡沫中的裂纹扩展是孔间的，而PES泡沫中的裂纹主要是由垂直孔边缘的延伸破坏引起的。夹心DCB标本也周期性地加载。对于PVC泡沫，裂纹的扩展速率基本上受密度的影响。对于PES泡沫，没有明确的迹象表明泡沫密度对裂纹扩展速率有影响。

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作者
Saenz, Elio.;
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作者单位

Florida Atlantic University.;

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授予单位 Florida Atlantic University.;
学科 Engineering Mechanical.;Engineering Materials Science.
学位 M.S.
年度 2012
页码 203 p.
总页数 203
原文格式 PDF
正文语种 eng
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专利

1. 高温下泡沫夹芯材料Ⅰ/Ⅱ混合型界面断裂特性试验 [J] . 王璐, 殷春详, 司奇楠南京航空航天大学学报（英文版） . 2020,第001期
2. Low temperature mixed-mode debond fracture and fatigue characterisation of foam core sandwich [J] . Journal of Sandwich Structures and Materials . 2020,第4期

机译：低温混合模式泡沫骨架骨折和泡沫芯三明治疲劳表征
3. In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets [J] . Sha J.B., Yip T.H., Wong S.K.M. Materials Science and Technology . 2006,第1期

机译：泡沫铝芯与金属面板夹芯梁弯曲条件下断裂和疲劳行为的原位表面位移分析
4. In situ surface displacement analysis of fracture and fatigue behaviour under bending conditions of sandwich beam consisting of aluminium foam core and metallic face sheets [J] . Sha JB, Yip TH, Wong SKM Materials Science and Technology: MST: A publication of the Institute of Metals . 2006,第1期

机译：泡沫铝芯和金属面板夹芯梁弯曲条件下断裂和疲劳行为的原位表面位移分析
5. MIXED MODE FRACTURE BEHAVIOR OF CELLULAR FOAM CORES USED IN SANDWICH STRUCTURES [C] . A. Siriruk, D. Penumadu, K. G. Thomas International Conference on Composite Materials . 2011

机译：三明治结构中使用的细胞泡沫芯的混合模式断裂行为
6. Design of a Material Test Kit for Use from 1.6 GHz to 26.5 GHz and its Use in Evaluation of Dielectric Properties of Foam Core Materials Used in Sandwich Composites. [D] . Sankranthi, Naveen Kumar. 2012

机译：设计用于1.6 GHz至26.5 GHz的材料测试套件，并将其用于评估夹芯复合材料中所用泡沫芯材料的介电性能。
7. Flexural Response of Degraded Polyurethane Foam Core Sandwich Beam with Initial Crack between Facesheet and Core [O] . Gurpinder Singh Dhaliwal, Golam M. Newaz 2020

机译：具有面板和核心初始裂纹的降解聚氨酯泡沫芯夹层梁弯曲响应
8. Effect of Crack Arrester on Fatigue Crack Growth in Foam Core Sandwich Panel under Mode II Type Loading [O] . Hirokazu MATSUDA, Masaki HOJO, Go MATSUBARA, 2017

机译：裂缝避雷器对模式II型载荷下泡沫芯夹层板疲劳裂纹生长的影响

Fatigue and fracture of foam cores used in sandwich composites.

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