Modeling the mechanical properties of notched aluminum—epoxy particulate composites

Papanicolaou, George; Xepapadaki, A. G.; Angelakopoulos, G.A.

doi:10.1002/app.36823

Cited by 11 publications

(10 citation statements)

References 31 publications

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“…As observed clearly in Figure (a) the adhesion between the filler and the matrix is bad. In general, the main disadvantage of natural filers as reinforcements to polymer matrices is the poor compatibility between filler and matrix and their relative high moisture absorption …”

Section: Resultsmentioning

confidence: 99%

“…These findings were experimentally verified through both SEM photography and relevant sources as taken from Refs. . It was proved that the RPM model predicted perfectly well and much better than the two other models the stress relaxation behavior of the composites investigated and above all it can predict well both the linear and the nonlinear viscoelastic behavior. Finally, it was found that the relaxation times as calculated from the RPM model application, depend both on the applied deflection and the filler weight fraction.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Stress relaxation behavior of starch powder‐epoxy resin composites

Papanicolaou

Kontaxis

Koutsomitopoulou³

et al. 2014

J of Applied Polymer Sci

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The purpose of the present study is to investigate the quasi-static and the viscoelastic behavior of epoxy resin reinforced with starch powder. An increase in the elastic modulus on the order of 42% was achieved; a behavior that was predicted by the modulus prediction model (MPM). Next, the composite was subjected to flexural relaxation experiments, in order to determine the relaxation modulus, at different filler-weight fractions and flexural deflections imposed. The viscoelastic models of the standard linear solid, the power law model and the residual property model (RPM) were applied in order to simulate/predict the stress relaxation curves. Predicted values derived from the application of the above models were compared to each-other as well as to respective experimental findings. From the above comparison it was proved the superiority of the RPM model in predicting both the linear and the nonlinear viscoelastic response of the materials investigated.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Stress relaxation behavior of starch powder‐epoxy resin composites

Papanicolaou

Kontaxis

Koutsomitopoulou³

et al. 2014

J of Applied Polymer Sci

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“…This result may be explained for the solid particles are sharing a larger portion of the load than the comparatively soft matrix [42]. Moreover, the Al particles have much higher modulus in comparison with polymer and so as volume fraction is increasing, the initial modulus of the propellant is increasing too [43].…”

Section: Effect Of Al Contentmentioning

confidence: 99%

Effects of Aluminum and Temperature on the Tensile Mechanical Properties of Lithium‐Perchlorate/Polyvinyl Alcohol‐Based Electrically Controlled Solid Propellants

Xia

et al. 2019

Propellants Explo Pyrotec

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To study the mechanical properties of lithium‐perchlorate/polyvinyl alcohol‐based aluminized electrically controlled solid propellant (LP/PVA‐Al‐ECSP), the effects of Al particle size, grading, and content on the mechanical properties of the propellant at various temperatures were investigated. The uniaxial tensile experiments were conducted over the temperature range from −40 °C to +50 °C using universal testing machine with a crosshead speed of 100 mm min−1. A scanning electron microscope (SEM) was employed to observe the fracture surface morphologies of the specimens. The results indicate that Al powder and temperature greatly affects the mechanical properties of the composite propellant. From experiments in which the size and the fine‐to‐coarse ratio of Al were changed at constant solid loading, the tensile strength and initial modulus of the propellant are improved with the increase of Al particle size and coarse‐to‐fine ratio at 25 °C. The increase in Al content improves the tensile strength and initial modulus of the propellant, whereas reduces the elongation. The results of experiments in which the temperature changed indicate that the tensile strength and initial modulus of the propellant are improved at low temperatures, whereas the mechanical properties of the propellants deteriorate at high temperatures. The elongation of the propellants is greatly reduced at low temperatures. The stress−strain curve of ECSP shows three regions at low temperatures and five regions at room temperature and high temperatures. The LP/PVA‐Al‐ECSP has poor tensile strength and initial modulus, whereas its elongation is extremely high at room temperature. The propellant with 5 μm Al to 65 μm Al ratio of 3/7 exhibits the best comprehensive mechanical properties.

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“…[21][22][23] In the present work, the RPM has been applied in order to predict the residual compressive strength of five different materials systems as a function of the additives concentration. In all cases and independently of the material system under consideration, function M was found as: M ¼ C 2 , where C is the percentage concentration of the phase added.…”

Section: The Rpm Model Presentation and Applicationmentioning

confidence: 99%

“…The RPM model has already been successfully applied to all the above-mentioned cases as well as to many others such as materials property degradation after thermal shock cycling, and strength reduction due to materials discontinuities (central hole, edge cracking, etc.). 21–23…”

Section: Residual Property Modeling and Porosity Estimationsmentioning

confidence: 99%

Influence of artificially-induced porosity on the compressive strength of calcium phosphate bone cements

et al. 2016

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The biological and mechanical nature of calcium phosphate cements (CPC's) matches well with that of bone tissues, thus they can be considered as an appropriate environment for bone repair as bone defect fillers. The current study focuses on the experimental characterization of the mechanical properties of CPCs that are favorably used in clinical applications. Aiming on evaluation of their mechanical performance, tests in compression loading were conducted in order to determine the mechanical properties of the material under study. In this context, experimental results occurring from the above mechanical tests on porous specimens that were fabricated from three different porous additives, namely albumin, gelatin and sodium alginate, are provided, while assessment of their mechanical properties in respect to the used porous media is performed. Additionally, samples reinforced with hydroxyapatite crystals were also tested in compression and the results are compared with those of the above tested porous CPCs. The knowledge obtained allows the improvement of their biomechanical properties by controlling their structure in a micro level, and finds a way to compromise between mechanical and biological response.

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Modeling the mechanical properties of notched aluminum—epoxy particulate composites

Cited by 11 publications

References 31 publications

Stress relaxation behavior of starch powder‐epoxy resin composites

Stress relaxation behavior of starch powder‐epoxy resin composites

Effects of Aluminum and Temperature on the Tensile Mechanical Properties of Lithium‐Perchlorate/Polyvinyl Alcohol‐Based Electrically Controlled Solid Propellants

Influence of artificially-induced porosity on the compressive strength of calcium phosphate bone cements

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