A New Force-Measuring Device

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Presentation transcript:

A New Force-Measuring Device Design & Experiments Zhongyuan Wo Student Intern August 26, 2016

Outlines Application of Device Experiment Plan Calculation Test Scheme Loading & Measuring Devices Calculation Equations Comparison of Calculation & real load

Application Scenario Measuring force in structural test Both axial load & moment Bottom of columns loading Places of devices

Outlines Application of Device Experiment Plan Calculation Test Scheme Loading & Measuring Devices Calculation Equations Comparison of Calculation & real load

Test Scheme M+N To examine precision Fundamental Program Design The measuring device Loading device Device M+N Compare Real Load Calculation

Loading Device Axial Load Axial & Moment To Change N/M N Moving to change arm Different locations Different M direction Rotating device Arm N Arm N & M

Measuring Devices Two devices Rotated loading device Calculation Circular Rectangular Rotated loading device Calculation Strain Stress Stress N&M Linear Integrate

Photos Strain gage Whole structure

Outlines Application of Device Experiment Plan Calculation Test Scheme Loading & Measuring Devices Calculation Equations Comparison of Calculation & real load

Equations Assumptions Strain Distribution Stress-Strain: linear Plane cross-section* Strain Distribution * Since no shear force on this section, this assumption is reasonable

Equations Assumptions Strain Distribution Stress-Strain: linear Plane cross-section Strain Distribution

Equations

Part Results Compare: real & calculation Moment Comparison (Arm=14cm) Force Comparison (Arm=14cm) Real Calculation Real Calculation Moment (kN·m) Force (kN) Steps Steps