INTRODUCTION and THEORY BEAM LOADING AND REACTIONS POSITIONS W= APPUED LOAD Figure I Beam setup and schematic As well as the information given on the unit you will need the following formula: E= Where: =Stress(Nm2)=Strain E= Young's modulus for the beam material (Nm2) (Typically 69109Nm2 or 69GPa ) and IM=y M= Bending moment (Nm) I= Second moment of area of the section (m4) = Stress (Nm2) y= Distance from the neutral axis (m) Figure 2 Beam nominal dimensions and strain gauge positions Figure 3 Bending sfress in a beam experiment in the structures frame Ensure the beam and Load Cell are properly aligned. Turn the thumbwheel on the Load Cell to apply a positive (downward) preload to the beam of about 100N. Zero the Load cell using the control. Take the nine zero strain readings by choosing the number with the selector switch. Fill in Table 1 with the zero force values. Increase the load to 100N and note all nine of the strain readings. Repeat the procedure in 100N increments to 500N. Finally; gradually release the load and preload. Correct the strain reading values for zero (be careful with your signs!) and convert the load to a bending moment then fill in Table 2. Table I Strain (pe) results for experiment 5. Table 2 Strain ( ) readings for experiment 5 (corrected) Table 3 Averaged strain () readings for experiment 5 Results and Discussions 1. From your results, plot a stress distribution over the cross section of beam. 2. Calculate the second moment of area by means of theory and experimental datas, after compare the both results. Reference: TecQuipment User Guide, www.tecqupiment,com