15 Questions
What is the purpose of the dial gauges (4) in the bar bending device?
To measure the deflections of the bar under different loads
In a cantilever bar, how is the bar supported?
One end fixed, the other end free
What does it mean for a system to be statically undetermined?
It requires supplementary information for its solution
What is the purpose of the threaded spindle (9) in the experiment setup?
To adjust the height of the support
Which term best describes a statically undetermined system?
Statically indeterminate
What is the purpose of applying the superposition principle in this context?
To find the combined deformation caused by individual loads
How is the unknown supporting force A determined?
By ensuring the total deformation at the front end of the bar is zero
What must be the relationship between the deformations induced by load F and supporting force A?
They must have equal magnitude but opposite direction
What does the equation 3 2 3 ( - ) 3 2 3 F A y y Fa F L a a AL f f EI EI EIy represent?
The sum of both deformations induced by load F and supporting force A
What is the purpose of measuring the elastic line of a bar on two supports for center loading?
To understand the elastic deformation behavior of the bar under specific loading conditions
The bar transmits normal orce, transverse orce and moment, there______ore it is supported in a statically determined manner. De______lections at di____________erent lengths are measured to demonstrate the in______luence o the length and compared with calculated values. The equation or the de______lection $$ o the bar at the point o______ application o______ ______orce is as ollows: $ = ______rac{FL^3}{3EI}$
f
A statically undetermined system exists when the valency of the support is greater than the number of degrees of freedom of the system. A system in the plane, such as the bar, has 3 degrees of freedom. If a bar is clamped on one side and supported by a Simple support on the other side, the sum of all support valencies is ______, in other words, larger than the number of degrees of freedom that is 3, which means the bar is statically undetermined.
4
In such cases, the unknown support reactions cannot be calculated solely by means of the equilibrium relations of the forces and moments. By applying the ______ principle, which is explained as the sum of all.
superposition
The height of the support can be adjusted using a threaded spindle (9). The support can be locked in position by the ______ (10). This compensates deformation of the bar by its own weight or deflection of the support caused by spring excursion of the dynamometer.
screw
The height of the dial gauges (4) can be adjusted on their holders (12). 1 Stable frame 2,3 Supports ______ Dial gauge 5 Load weights 6 Simple rider 7 The bar 8 Dynamometer 9 Threaded spindle 10 Threaded screw 11 Clamping plate 12 Gauge holder Table 1 : List of equipment Figure 3 : Support and load 4 3. Experiment After test bar is mounted, a combination of weight, dial gauge, and supports can be attached.
4
Test your knowledge on the experiment of deformation of straight beams. This quiz covers the content of the experiment including the introduction, setup, conduct, evaluation, and technical data. Make sure to bring a scratch paper to keep track of measurements during the experiment.
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