Dynamic Compressive Response and Failure Behavior of an Epoxy Syntactic Foam

2004 ◽  
Vol 38 (11) ◽  
pp. 915-936 ◽  
Author(s):  
Bo Song ◽  
Weinong Chen ◽  
Danny J. Frew
Keyword(s):  
Syntactic Foam ◽  
Failure Behavior ◽  
Compressive Response

Strength Analysis of Syntactic Foams Using a Three-Dimensional Continuum Damage Finite Element Model

2015 ◽  
Vol 82 (2) ◽  
Author(s):  
Yejie Shan ◽  
Guodong Nian ◽  
Qiang Xu ◽  
Weiming Tao ◽  
Shaoxing Qu
Keyword(s):  
Finite Element ◽  
Tensile Strength ◽  
Volume Fraction ◽  
Three Dimensional ◽  
Syntactic Foam ◽  
Interfacial Strength ◽  
Strength Analysis ◽  
Failure Behavior ◽  
Fe Model ◽  
Syntactic Foams

The failure behavior of the syntactic foams is investigated based on a three-dimensional (3D) micromechanical finite element (FE) model, by varying the volume fraction, the wall thickness of the hollow particles, and the interfacial strength. The maximum principal stress criterion is adopted to determine the state (damaged or undamaged) for both interface and matrix. Material property degradation is used to describe the mechanical behavior of those damaged elements. The current model can reasonably predict the tensile strength of the syntactic foams with high volume fractions (40%–60%). The failure mechanism of the syntactic foam under uniaxial tension is captured by analyzing the stress–strain curves and the contours of damaging evolution process. Results from the quantitative simulations demonstrate that the tensile strength of the syntactic foam can be improved effectively by enhancing the interfacial strength.

Dynamic compressive response and failure behavior of fiber polymer composites embedded with tetra-needle-like ZnO nanowhiskers

2010 ◽  
Vol 92 (12) ◽  
pp. 2984-2991 ◽  
Author(s):  
Mao-Sheng Cao ◽  
Wei-Li Song ◽  
Wei Zhou ◽  
Da-Wei Wang ◽  
Ji-Li Rong ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Failure Behavior ◽  
Compressive Response

Quasi-Static and High Strain Rate Compressive Response of Injection-Molded Cenosphere/HDPE Syntactic Foam

JOM ◽  
2016 ◽  
Vol 68 (7) ◽  
pp. 1861-1871 ◽  
Author(s):  
B. R. Bharath Kumar ◽  
Ashish Kumar Singh ◽  
Mrityunjay Doddamani ◽  
Dung D. Luong ◽  
Nikhil Gupta
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Syntactic Foam ◽  
Compressive Response ◽  
Injection Molded

Graphene nanofillers as a player to improve the dynamic compressive response and failure behavior of carbon/epoxy composite

2020 ◽  
Vol 31 (42) ◽  
pp. 425709
Author(s):  
M Chihi ◽  
M Tarfaoui ◽  
Y Qureshi ◽  
H Benyahia ◽  
C Bouraoui
Keyword(s):  
Epoxy Composite ◽  
Failure Behavior ◽  
Compressive Response

Modelling the dynamic compressive response of syntactic foam with hierarchical cell structure

2021 ◽  
Vol 124 ◽  
pp. 104248
Author(s):  
Zhiqiang Fan ◽  
Fei Zhang ◽  
Bingbing Zhang ◽  
Tianming He ◽  
Peng Xu ◽  
...  
Keyword(s):  
Cell Structure ◽  
Syntactic Foam ◽  
Compressive Response

Compressive response of some agricultural soils influenced by the mineralogy and moisture

2013 ◽  
Vol 27 (3) ◽  
pp. 239-246 ◽  
Author(s):  
A.E. Ajayi ◽  
M.S. Dias Junior ◽  
N. Curi ◽  
I. Oladipo
Keyword(s):  
Agricultural Soils ◽  
Tropical Soils ◽  
Homogeneity Test ◽  
Confined Compression ◽  
Moisture Retention ◽  
Soil Mineralogy ◽  
Undisturbed Soil ◽  
Statistical Homogeneity ◽  
Compressive Response ◽  
Fine Clay

Abstract This study aimed to investigate the mineralogy, moisture retention, and the compressive response of two agricultural soils from South West Nigeria. Undisturbed soil cores at the A and B horizons were collected and used in chemical and hydrophysical characterization and confined compression test. X-ray diffractograms of oriented fine clay fractions were also obtained. Our results indicate the prevalence of kaolinite minerals relating to the weathering process in these tropical soils. Moisture retention by the core samples was typically low with pre-compression stress values ranging from50 to 300 kPa at both sites. Analyses of the shape of the compression curves highlight the influence of soil moisture in shifts from the bi-linear to S-shaped models. Statistical homogeneity test of the load bearing capacity parameters showed that the soil mineralogy influences the response to loading by these soils. These observations provide a physical basis for the previous classification series of the soils in the studied area. We showed that the internal strength attributes of the soil could be inferred from the mineralogical properties and stress history. This could assist in decisions on sustainable mechanization in a datapoor environment.

Interpreting Laser-Based Fault Localization Results: Case Studies

2019 ◽  
Author(s):  
Sukho Lee ◽  
John van den Biggelaar ◽  
Marc van Veenhuizen
Keyword(s):  
Case Studies ◽  
Circuit Design ◽  
High Sensitivity ◽  
Failure Behavior ◽  
Process Technology ◽  
Resistance Change ◽  
Voltage Imaging ◽  
Root Cause ◽  
First Case ◽  
Proper Interpretation

Abstract Laser-based dynamic analysis has become a very important tool for analyzing advanced process technology and complex circuit design. Thus, many good reference papers discuss high resolution, high sensitivity, and useful applications. However, proper interpretation of the measurement is important as well to understand the failure behavior and find the root cause. This paper demonstrates this importance by describing two insightful case studies with unique observations from laser voltage imaging/laser voltage probing (LVP), optical beam induced resistance change, and soft defect localization (SDL) analysis, which required an in-depth interpretation of the failure analysis (FA) results. The first case is a sawtooth LVP signal induced by a metal short. The second case, a mismatched result between an LVP and SDL analysis, is a good case of unusual LVP data induced by a very sensitive response to laser light. The two cases provide a good reference on how to properly explain FA results.

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