[Univ of Cambridge] [Dept of Engineering]


The Beambend program was written in collaboration with Dr Calladine to be used in both first and second year structures laboratories.

The main aim of the program is to increase students understanding of the way in which bending moments and deflections develop when loads are applied to a beam. In particular it is designed to enhance students knowledge of:

The program lets students define a beam structure by altering the dimensions of a set configuration. The set configuration consists of a beam which is built in at one end, with two supports and two loads acting on it. The number of supports or loads acting on the beam can be changed by making the distance from the fixed end to a support or load greater than the beam length.

Having defined the beam configuration a student can specify that the beam is crooked or that the supports are out of line. The user can watch the beam deform and the bending moment diagram change as the supports are raised into position.

The student can then increase or decrease the loads at the points that were defined when the beam configuration was set up. The beam can be modelled as either elastic or elastic-plastic. If the student chooses to model it as elastic then the user is shown the deformed shape of the beam, force vectors and the bending moment diagram as the loads are changed. If the user chooses to use the elastic-plastic model a graph of load against deflection is drawn as the beam is loaded in addition to the deformed shape, force vectors and the moment diagram.

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Updated on 12th December, 1997