4. "Hand-in question": In an indentation experiment, a slab of metal of thickness h is subjected to a constant pressure P on its upper surface by a cylinder of radius a. measures the vertical displacement U of the indentation. The displacement also depends upon two material properties, Poisson's ratio w, which is dimensionless, and the Lamé constant µ, which has dimensions M/L³T², where M is mass, L is length and T is time. Show that there is an equivalent physical law of the form The technician then P h U = aF pa² a

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4. "Hand-in question": In an indentation experiment, a slab of metal of thickness h is subjected
to a constant pressure P on its upper surface by a cylinder of radius a. The technician then
measures the vertical displacement U of the indentation. The displacement also depends upon two
material properties, Poisson's ratio w, which is dimensionless, and the Lamé constant µ, which has
dimensions M/L³T², where M is mass, L is length and T is time. Show that there is an equivalent
physical law of the form
Ph
U = aF
pa²’ a
Transcribed Image Text:4. "Hand-in question": In an indentation experiment, a slab of metal of thickness h is subjected to a constant pressure P on its upper surface by a cylinder of radius a. The technician then measures the vertical displacement U of the indentation. The displacement also depends upon two material properties, Poisson's ratio w, which is dimensionless, and the Lamé constant µ, which has dimensions M/L³T², where M is mass, L is length and T is time. Show that there is an equivalent physical law of the form Ph U = aF pa²’ a
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