Measurement of Strength of EN3B Mild Steel Using Lateral Gauges

Hammond, R. I.; Winter, R. E.; Harris, E. J.

doi:10.1063/1.2263554

Cited by 2 publications

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“…For all of the simulations presented in this paper the gauge was mounted 2 mm from the impact surface, the shock was delivered by a copper plate of 5.6 mm thickness and 400 m s −1 velocity, and the target or 'matrix' material was steel. Based on comparisons by Hammond et al [9] of code simulations with experimental results from [10], a constant strength of 1.8 GPa was assumed for the steel. From experimental data published by Rosenberg et al [3], the manganin in the Micro-Measurements gauges studied in this work was assumed to have a yield strength of 0.75 GPa [3].…”

Section: Baseline Configurationmentioning

confidence: 99%

The effect of shape and mounting on the piezo-resistive response of embedded manganin conductors

Winter¹,

Harris²

2006

J. Phys. D: Appl. Phys.

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In the ‘orthogonal gauge’ technique stress gauges mounted to measure both longitudinal and transverse stresses in a shocked matrix allow the shear strength of the matrix material to be determined. A useful measure of the sensitivity of an orthogonal gauge system to changes in the yield strength of the matrix material is provided by the ratio between the resistance change of gauges of a given cross-sectional shape mounted in transverse and longitudinal orientations, (the T/L ratio). A low T/L ratio indicates a more sensitive, and therefore more potentially useful, system. A Eulerian hydrocode has been used to compute the resistance change of manganin wires of rectangular cross-section and infinite length embedded in both longitudinal and transverse orientation in steel targets subjected to nominally one-dimensional shocks. Configurations in which the gauges were (a) embedded directly into the steel and (b) mounted within thin strengthless polymer layers were studied. It is shown that in case (a) the T/L ratio reduces as the aspect ratio of the gauge cross-section increases. When the gauges are embedded in a strengthless polymer layer (case (b)), the T/L ratio is lower than when the gauges are embedded directly into the matrix but in this case the aspect ratio of the manganin conductor has little influence on the T/L ratio. The observed resistance changes are explained in terms of the stresses in the gauges. The results give insight into the factors which control resistance change and offer the prospect of improvements to current gauge designs.

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Section: Baseline Configurationmentioning

confidence: 99%

The effect of shape and mounting on the piezo-resistive response of embedded manganin conductors

Winter¹,

Harris²

2006

J. Phys. D: Appl. Phys.

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Calculating the Resistance of Lateral Manganin Gauges in a Steel Matrix

Harris¹,

Winter

2006

AIP Conference Proceedings

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High resolution computer simulations of manganin gauges mounted to measure lateral stresses in a steel matrix subject to nominally 1-D shock have been run using the AWE Eulerian code Shamrock. The components of the stress and strain in each of the cells in the manganin element have been obtained from the code. Piezoresistive and plastic strain coefficients derived by previous workers have been used to compute the resistivity of each cell in the gauge and, ultimately, the total resistance change of the gauge. The predicted resistance changes are compared with existing experimental data.

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Measurement of Strength of EN3B Mild Steel Using Lateral Gauges

Cited by 2 publications

References 0 publications

The effect of shape and mounting on the piezo-resistive response of embedded manganin conductors

The effect of shape and mounting on the piezo-resistive response of embedded manganin conductors

Calculating the Resistance of Lateral Manganin Gauges in a Steel Matrix

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