A metallic specimen is subjected to a bending moment M and an axial load F, as shown in the figure below. It is assumed that the measurement is conducted in an environment of constant temperature, that is, the thermal strain is negligibly small. The bending and axial strain on the upper surface are denoted using , and ,, respectively. F F F M M M Design I Design II (Two identical sets of graphs for affixing strain gages to the specimen by each design) You are asked to come up with two different designs in order to sense the bending strain only. In each design, you are allowed to use only two strain gages. In each design, you need to do the following: i) Showing on the graph how the strain gages are affixed to the specimen; ii) Writing down the expressions of measured strains by each gage; iii) Illustrating how the gages shall be connected to a bridge circuit; iv) Presenting the output expression3; v) Calculating the bridge constant;

A metallic specimen is subjected to a bending moment M and an axial load F, as shown in the figure below. It is assumed that the measurement is conducted in an environment of constant temperature, that is, the thermal strain is negligibly small. The bending and axial strain on the upper surface are denoted using , and ,, respectively. F F F M M M Design I Design II (Two identical sets of graphs for affixing strain gages to the specimen by each design) You are asked to come up with two different designs in order to sense the bending strain only. In each design, you are allowed to use only two strain gages. In each design, you need to do the following: i) Showing on the graph how the strain gages are affixed to the specimen; ii) Writing down the expressions of measured strains by each gage; iii) Illustrating how the gages shall be connected to a bridge circuit; iv) Presenting the output expression3; v) Calculating the bridge constant;

Materials Science And Engineering Properties

1st Edition

ISBN:9781111988609

Author:Charles Gilmore

Publisher:Charles Gilmore

Chapter6: Introduction To Mechanical Properties

Section: Chapter Questions

Problem 6.5P

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