Modelling a Frame Subjected to Multiple Loading Conditions
LAB REPORT
Pin Jointed Frame
1312800
1st year school of engineering University of Warwick
Date Submitted: 8/01/2014
Summary
In this experiment the main aim was to modelling a frame subjected to multiple loading conditions and record how the force and strain vary to different loads. The frame represented a simple roof trusses and the loading conditions are similar to what a typical roof would undergo. In this experiment a universal fame was used with load cells to provide the load and digital force and strain instruments to record the data. As the load was increased the strain went up linear showing a linear relationship between loading and strain. After analysing results it was found that the results for experimental forces compared to theoretical forces were very close showing that this experiment was very accurate, with very small uncertainty, the reason for this is due to very sensitive equipment as a change of 1µϵ is equivalent to change of 6 N (using young’s modulus) and other factors described in detail in the report.
Table of Contents Summary
1 Introduction Pg 4 2 Theory Pg.4 3.1 Apparatus Pg 6 3.2 Experimental procedures Pg 8 4 Observation and results Pg 8 4.1 Results Pg8 4.2 Observations Pg11 4.3 Discussion Pg11 4.4 Sources of error
Pin Jointed Frame
1312800
1st year school of engineering University of Warwick
Date Submitted: 8/01/2014
Summary
In this experiment the main aim was to modelling a frame subjected to multiple loading conditions and record how the force and strain vary to different loads. The frame represented a simple roof trusses and the loading conditions are similar to what a typical roof would undergo. In this experiment a universal fame was used with load cells to provide the load and digital force and strain instruments to record the data. As the load was increased the strain went up linear showing a linear relationship between loading and strain. After analysing results it was found that the results for experimental forces compared to theoretical forces were very close showing that this experiment was very accurate, with very small uncertainty, the reason for this is due to very sensitive equipment as a change of 1µϵ is equivalent to change of 6 N (using young’s modulus) and other factors described in detail in the report.
Table of Contents Summary
1 Introduction Pg 4 2 Theory Pg.4 3.1 Apparatus Pg 6 3.2 Experimental procedures Pg 8 4 Observation and results Pg 8 4.1 Results Pg8 4.2 Observations Pg11 4.3 Discussion Pg11 4.4 Sources of error
References: Mechanics structures and thermo dynamics –university of Warwick Mechanics lectures by Dr. T. Karavasilis http://www.tecquipment.com/Datasheets/STR8_0213.pdf 29/12/2013 Appendices Pin jointed lab briefing sheets Theory (1.) (2). Stress strain thoery Briefing sheet http://www2.warwick.ac.uk/fac/sci/eng/eso/modules/year1/es184/studentresource/ms/lab_handout2012.pdf