Numerical and experimental studies of damage generation in multi-layer composite materials at high strain rates

Taşdemirci, Alper; Hall, Ian W.

doi:10.1016/j.ijimpeng.2005.08.010

Cited by 49 publications

(24 citation statements)

References 36 publications

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“…Also, progress of the crack growth and the fracture conoid formation is depicted at di erent instants after the projectile Table 4. Johnson-Holmquist material parameters for 99.5% alumina tiles [44]. (kg/m 3 ) impact.…”

Section: Numerical Simulation Resultsmentioning

confidence: 99%

Experimental and numerical study on the effect of aluminum foil wrapping on penetration resistance of ceramic tiles

2017

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Abstract. In this work, energy absorption of ceramic tiles wrapped by aluminum foil on its impact face is experimentally and numerically studied. Penetration tests as well as numerical simulations are employed to obtain Ballistic Limit Velocity (BLV) of the tiles. Experimental and numerical results yield BLV of bare tiles as 145 2 and 141.5 m/s, respectively. For the wrapped tiles, these values are increased to 168 2 and 162 m/s, respectively. Therefore, 13% increase in BLV of the ceramic tiles is obtained by just 2.4% increase in its weight. Moreover, it is shown that energy absorption of the wrapped tiles is at least 11% greater than that of the bare ones. Based on the results, the increase in BLV and energy absorption is due to the increase in the fracture conoid angle which postpones crack propagation to the back plate.

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Section: Numerical Simulation Resultsmentioning

confidence: 99%

Experimental and numerical study on the effect of aluminum foil wrapping on penetration resistance of ceramic tiles

2017

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“…Understanding the behavior of the material during the first few reverberations may be critical to designing better multilayer materials and previous studies [23][24][25][26][27] by the present authors have provided the first precise theoretical and experimental insights into the details of stress wave propagation in these materials.…”

Section: Introductionmentioning

confidence: 81%

Development of novel multilayer materials for impact applications: A combined numerical and experimental approach

Taşdemirci

Hall

2009

Materials & Design

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a b s t r a c tA well-verified and validated numerical model was used to investigate stress wave propagation in a multilayer material subjected to impact loading. The baseline material consisted of a ceramic faceplate and composite backing plate separated by a rubber or teflon foam interlayer: several variants were investigated in which the number, type, and total thicknesses of the interlayers were altered. Comparison of the variants showed that the use of multiple teflon foam interlayers could drastically reduce the average stress in the multilayer material. Based on the numerical results, further experimental work was undertaken upon one of the variants. Very large and unexpected tensile stress oscillations were observed in the ceramic layers, leading to a refinement of the numerical model which successfully reproduced the oscillations and also demonstrated that separation of the sample layers led to trapping of the stress wave within the layers. Use of the validated numerical model allowed detailed analysis of the processes of wave transmission and demonstrates the important synergy that can exist between experimental and modeling studies. The current study provides a valuable starting point for designing future multilayer materials with specific, controlled properties.

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“…Early development and validation of the model have been previously reported [11][12][13], principally for elastic deformation in multi-layer materials, but the present report concerns the first application to damage and fracture in a composite material. Briefly, if the output of the SHPB simulation exactly matches the experimentally measured response then the model is accurately capturing the details of wave propagation and damage generation inside the sample.…”

Section: Experiments and Modelingmentioning

confidence: 99%

Numerical and experimental studies of damage generation in a polymer composite material at high strain rates

Taşdemirci

Hall

2006

Polymer Testing

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Samples of S2-glass/epoxy composites have been subjected to microstructural investigation after testing in compression at quasi-static and high strain rates using the split Hopkinson pressure bar. A numerical model was developed that accurately describes the high strain rate mechanical response of the samples. Moreover, in contrast with earlier phenomenological or constitutive models, the model can also predict a variety of failure modes such as delamination, matrix cracking or fiber crushing. High-speed photography was used to check the model results. Interrupted tests, followed by metallographic examination, have revealed that the sequence of damage events differs between quasi-static and high strain rate regimes. The effect of sample size on measured mechanical properties is noted and is confirmed via numerical modeling. r

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Numerical and experimental studies of damage generation in multi-layer composite materials at high strain rates

Cited by 49 publications

References 36 publications

Experimental and numerical study on the effect of aluminum foil wrapping on penetration resistance of ceramic tiles

Experimental and numerical study on the effect of aluminum foil wrapping on penetration resistance of ceramic tiles

Development of novel multilayer materials for impact applications: A combined numerical and experimental approach

Numerical and experimental studies of damage generation in a polymer composite material at high strain rates

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