Developing a laser shockwave model for characterizing diffusion bonded interfaces

Lacy, Jeffrey M.; Smith, James A.; Rabin, B. H.

doi:10.1063/1.4914752

Cited by 4 publications

(5 citation statements)

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“…The basic experimental setup is shown in Fig. 1(a) and discussed in detail in [3][4][5][6][7][8][9]. As shown in Fig 1(a), a high-energy laser pulse (up to 2.4 J) generates a shock wave that propagates through the test sample.…”

Section: Experiments and Discussionmentioning

confidence: 99%

“…The current LS system uses an F-P etalon to measure surface velocities. The LS F-P velocimeter is well documented in previous research [3][4][5][6][7][8][9]17]. The F-P velocimeter consists of a resonant optical cavity made from two parallel reflecting surfaces (i.e., thin mirrors).…”

Section: Fabry-perot Interfeometermentioning

confidence: 99%

“…A Fabry-Perot (F-P) velocimeter measures the shockwave energy at the backside of the sample, Fig. 1(a) [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. The measured back surface velocity, Fig.…”

Section: Introductionmentioning

confidence: 99%

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Development Of A Photonic Doppler Velocimeter To Verify A Fabry-Perot Velocimeter

Smith

Benefiel

Evans

2023

2023 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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The laser shock system uses acoustic shockwaves to measure the interface strength of newly designed nuclear fuel plates. The quantitative measurement of interface strength will help understand fuel performance during irradiation. The laser shock technique imparts laser energy into a plate that then creates an acoustic shockwave. The amount of energy in the plate is proportional to the surface velocities measured on the back side of the plate. An accurate determination of surface velocity will enable better fuel performance predictions. The focus of this paper is on the implementation of a Photonic Doppler Velocimeter to corroborate the Fabry-Perot measurements from the laser shock system. Currently, a Fabry-Perot velocimeter takes the velocity measurements that are converted in stress. We have designed and implemented a Photonic Doppler Velocimeter to corroborate the Fabry-Perot measurements, which we discuss here along with implementing the short time fast Fourier transform to demodulate the heterodyne beat frequency into velocities. The Photonic Doppler Velocimeter has successfully corroborated the Fabry-Perot measurements.

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Section: Experiments and Discussionmentioning

confidence: 99%

Section: Fabry-perot Interfeometermentioning

confidence: 99%

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Development Of A Photonic Doppler Velocimeter To Verify A Fabry-Perot Velocimeter

Smith

Benefiel

Evans

2023

2023 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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“…For the specific case of Al-6061-O, rate dependence data from [24] was employed to identify the rate parameter C=0.07. Examining the data from the computational model of the Laser Shock test [21], reveals a characteristic strain rate on the order of 10 5 s -1 producing a rate dependence factor of 1.81 for this particular material. Employing values for Y0 and and 0.33 respectively, we predict an HEL value of 196 MPa in the laser shock tests of 6061-O.…”

Section: -4mentioning

confidence: 97%

“…For the moment we restrict ourselves to examination of the load rate effect. In previous work [21,22] we developed a parameter set for the Johnson-Cook [23] elastic-plastic constitutive model for aluminum 6061-O. The J-C model is written as (11) with terms for initial yield (A); work hardening ( …”

Section: Rate Dependence Of the Helmentioning

confidence: 99%

Use of the Hugoniot elastic limit in laser shockwave experiments to relate velocity measurements

Smith¹,

Lacy²,

Lévesque³

et al. 2016

AIP Conference Proceedings

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Compressive strength measurements in aluminum for shock compression over the stress range of Journal of Applied Physics 98, 033524 (2005) Abstract. The US National Nuclear Security Agency has a Global Threat Reduction Initiative (GTRI) with the goal of reducing the worldwide use of high-enriched uranium (HEU). A salient component of that initiative is the conversion of research reactors from HEU to low enriched uranium (LEU) fuels. An innovative fuel is being developed to replace HEU in high-power research reactors. The new LEU fuel is a monolithic fuel made from a U-Mo alloy foil encapsulated in Al-6061 cladding. In order to support the fuel qualification process, the Laser Shockwave Technique (LST) is being developed to characterize the clad-clad and fuel-clad interface strengths in fresh and irradiated fuel plates. This fuel-cladding interface qualification will ensure the survivability of the fuel plates in the harsh reactor environment even under abnormal operating conditions. One of the concerns of the project is the difficulty of calibrating and standardizing the laser shock technique. An analytical study under development and experimental testing supports the hypothesis that the Hugoniot Elastic Limit (HEL) in materials can be a robust and simple benchmark to compare stresses generated by different laser shock systems.

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Further investigation of surface velocity measurements for material characterization in laser shockwave experiments

Smith

Lacy

Scott

et al. 2018

AIP Conference Proceedings

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Developing a laser shockwave model for characterizing diffusion bonded interfaces

Cited by 4 publications

References 0 publications

Development Of A Photonic Doppler Velocimeter To Verify A Fabry-Perot Velocimeter

Development Of A Photonic Doppler Velocimeter To Verify A Fabry-Perot Velocimeter

Use of the Hugoniot elastic limit in laser shockwave experiments to relate velocity measurements

Further investigation of surface velocity measurements for material characterization in laser shockwave experiments

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