Articles Posted in the " Springs " Category

  • LAMINATED SPRINGS

    LAMINATED SPRINGS

     LAMINATED SPRINGS Keywords: Stress-Deflection-strain energy-PLATE SPRING LAMINATED SPRING This type of spring is very common in use. There is an advantage in using a leaf spring over the coiled spring that it also acts as a structural member in addition to a shock absorber. It is used in cars, trucks, buses and trains. This type […]


  • Spiral spring–Stress and resilience

    Spiral spring–Stress and resilience

    Spiral spring This spring stores energy in it and is used in watches, toys, wall clocks, galvanometers,  steering wheels and balancing springs for smaller angles of rotation. Recently these are being replaced by pencil cells in the watches and toys.These are used in compact spaces.Spiral springs are shaped like a Jalebi and hence also called Jalebi springs. It releases […]


  • OPEN COILED HELICAL SPRING – UNDER AXIAL COUPLE

    OPEN COILED HELICAL SPRING – UNDER AXIAL COUPLE

    OPEN COILED HELICAL SPRING – UNDER AXIAL COUPLE Let M be the couple applied to the spring. The applied couple tends to open the spring more. Or decrease the number of turns in the spring. If M increases the radius of curvature then it is called positive couple. If the applied couple tends to decrease […]


  • OPEN COILED HELICAL SPRING – UNDER AXIAL LOAD

    OPEN COILED HELICAL SPRING – UNDER AXIAL LOAD

     OPEN COILED HELICAL SPRING-Under Axial Load (a) ONLY UNDER AXIAL LOAD   Spring will be deflected as well as twisted. Let α be the angle of the helix Then the length of n turns of spring L =πDn/cos α Consider a section of the spring[as shown in Fig.(c)]passing through the axis of the helix and perpendicular […]


  • CLOSE COILED SPRING – AXIAL TORQUE

    CLOSE COILED SPRING – AXIAL TORQUE

     CLOSE COILED SPRING -AXIAL TORQUE This torque will change the coil diameter and will be mainly producing the bending effect. Therefore such springs are designed on the basis of pure bending. Use bending equation for its analysis i.e. M/I = σ/y = E/R σ =(M/I) y Then M = EI (1/R’-1/R) R’ is the changed […]


  • IMPORTANT FEATURES OF SPRINGS

    IMPORTANT FEATURES OF SPRINGS

    IMPORTANT  FEATURES OF SPRINGS Spring store energy ass in watches and toys. A single spring can perform more than one fuinction. A spring is used to keep a component to bear against a surface or it maintains a contact with a surface, or engage or disengage a device as in a thermostat of a fridge […]


  • PERFORMANCE PARAMETERS OF A  CLOSED COIL HELICAL SPRING

    PERFORMANCE PARAMETERS OF A  CLOSED COIL HELICAL SPRING

    PERFORMANCE PARAMETERS OF A  CLOSED COIL HELICAL SPRING The performance parameters to be studied in springs are stress, stiffness and resilience. Symbols used Do= outer coil diameter Di= inside coil diameter Dm  OR  D= mean coil diameter d=diameter of wire na = number of active turns (circles) in the spring ni  = Number of inactive […]


  • CLOSED COILED HELICAL SPRINGS – AXIAL LOAD

    CLOSED COILED HELICAL SPRINGS – AXIAL LOAD

       CLOSED COILED HELICAL SPRINGS – AXIAL LOAD The parameters to be studied in springs are stress, stiffness and resilience. Symbols used Do= outer  coil diameter Di= inside coil diameter Dm=  mean coil diameter = D d=diameter of wire na = number of active turns (circles) in the spring ni  = Number of inactive turns […]


  • SPRINGS

    SPRINGS

    SPRINGS Springs are elastic objects that are subjected to axial load, eccentric load and twisting moments. These are elastically deformed significantly under the action of a force or a couple or both. These regain their original size and form on removal of force or couple or both. These store and release energy when required. These […]


  • INTERVIEW SHORT QUESTION ANSWERS-SPRINGS

    INTERVIEW SHORT QUESTION ANSWERS-SPRINGS

     INTERVIEW SHORT QUESTION ANSWERS -SPRINGS Keywords:Close coiled and Open coiled springs-Neutral axis   8. What is the difference between Close coiled and Open coiled springs? Closed Coiled Helical Spring The wire of this spring is in tension and hence also called a tension spring. In this case, the torsional shear stress is extremely high. Distance […]