A Numerical Approach to Predict Fracture in Bio-inspired Composites Using Ultrasonic Waves

Loving, Jacob; Fielder, Marco; Nair, Arun K.

doi:10.1007/s10921-018-0497-x

Cited by 4 publications

(1 citation statement)

References 38 publications

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“…First, it allows for the quantitative assessment and comparison of the ultrasound properties of samples that undergo slight variations in their manufacturing process, induced either by the curing or by the varying volume fractions. Second, it allows constituting a dataset of experimentally measured ultrasound characteristics for photopolymer materials, which will be valuable for the computational calibration and validation of models involving more complex spatial arrangements towards the design of programmable acoustic responses (Kruisov a et al, 2016;Loving et al, 2018;Miniaci et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Ultrasound characterization of the viscoelastic properties of additively manufactured photopolymer materials

Gattin

Bochud

Rosi

et al. 2022

The Journal of the Acoustical Society of America

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Photopolymer-based additive manufacturing has received increasing attention in the field of acoustics over the past decade, specifically towards the design of tissue-mimicking phantoms and passive components for ultrasound imaging and therapy. While these applications rely on an accurate characterization of the longitudinal bulk properties of the materials, emerging applications involving periodic micro-architectured media also require the knowledge of the transverse bulk properties to achieve the desired acoustic behavior. However, a robust knowledge of these properties is still lacking for such attenuating materials. Here, we report on the longitudinal and transverse bulk properties, i.e., frequency-dependent phase velocities and attenuations, of photopolymer materials, which were characterized in the MHz regime using a double through-transmission method in oblique incidence. Samples were fabricated using two different printing technologies (stereolithography and polyjet) to assess the impact of two important factors of the manufacturing process: curing and material mixing. Overall, the experimentally observed dispersion and attenuation could be satisfactorily modeled using a power law attenuation to identify a reduced number of intrinsic ultrasound parameters. As a result, these parameters, and especially those reflecting transverse bulk properties, were shown to be very sensitive to slight variations of the manufacturing process.

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Section: Introductionmentioning

confidence: 99%