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  Engineering Mechanics and machi

  Experimental Set Deflection Of Trusses

  This experimental set enables, in conjunction with the universal test frame , the elastic deformation of different plane trusses to be experimentally investigated. During these experiments, Castigliano’s theory is demonstrated and applied. The truss members are made of PVC. The different lengths of the members enable numerous truss variants to be assembled and save time-consuming adjustment. The members are quickly and securely attached to the joint disc using special snap action joints. A spindle drive with a ring dynamometer is used to load the truss. The two bearings with joint discs and the loading device are equipped with rapid action fasteners for attachment to the frame.

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  Engineering Mechanics and machi

  Pendulum Impact Tester

  The pendulum impact testing machine is a solid unit specially designed for engineering lectures. It is used for performing the notched bar impact bending test, one of the classic material tests. In this way, quality can be tested and the fracture behaviour of different metallic materials evaluated. The unit is equally suited for use with non-metallic specimens. The notched bar impact work necessary to deform the specimen can be read off directly from the gauge on a large scale. A two-hand trigger increases the safety for the user. A protective cover for the working area and a PC data acquisition is also available. The educational advantages of the unit lie in its simple layout and direct visibility of all actions. Together with the other units in the WP range, this unit is part of a complete course on the fundamental principles of material testing.

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  Engineering Mechanics and machi

  Cam Mechanism

  Cam mechanisms are used in many areas of technology, such as for valve control in combustion engines. The simple experimental set-up permits quick demonstration of the action principle, and can be used to demonstrate the influence of different cam shapes. The cam follower can work either as a roller tappet, cup tappet, or trailing lever. The stroke is measured using a mechanical position measurement gauge. A scaled disk indicates the associated angle of rotation.

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  Engineering Mechanics and machi

  Transmitted Light Polariscope

  Using this transmitted light polariscope, photoelastic experiments can be performed. This process exploits the fact that the refractive index of photoelastically sensitive materials changes under mechanical stress. Transmitted polarised light experiences a rotation of its plane of polarisation, this results in lines in the material subject to the same stress being of the same colour. The distribution of the stress in the model can thus be clearly seen. The polariscope can either generate coloured stress diagrams using white light or, using monochromatic light, light-dark diagrams. The filters, which have angular scales, can be rotated in a holder mounted on rollers. On the side is a pointer using which the angular position can be read off. Light sources, polarisation filters and load frames are separate components on this unit. Thus it is possible to realise flexible experimental set-ups also with own models.