NEiFatigueby Noran Engineering
NEiFatigue (WinLife) allows Engineers to calculate the fatigue life of components under dynamic loading. The fatigue life can be calculated by using a classical Nominal Stress method, or by using the more sophisticated Local Strain method.
NEiFatigue (WinLife) allows engineers to calculate the fatigue life of components under dynamic loading. The fatigue life can be calculated by using a classical Nominal Stress method, or by using the more sophisticated Local Strain method.
Capabilities
 Fatigue Calculation without FEM
 Classical methods: nominal stress concept and local concept
 Stress SN curves and mean stress sensitivity are required for the nominal stress concept
 Cyclic stressstrain curves, strain eN curves and damage parameter curves according to Smith, Watson and Tooper are required for the local concept
 Component loading is provided for both methods
 Loading history (stress, moment, force) obtained from a measurement can also be used
 Rainflow method used for counting of stress histories
 Easy to use Load Spectrum generator
 SN curve generator for steel, aluminum alloys and cast iron
 Fatigue life database calculated (can be extended by the user); contains SN curves and data describing the damage for materials commonly used
 Rainflow matrix plots
 Load spectrum plots
 Load hysteresis plots
 Damage XY and Contour plots
 Fatigue Calculation Combined with FEM
 Static FE calculation is used to ascertain the stress within the component
 The direction of the standard load must correspond to the actual force
 Critical nodes can be selected for the fatigue life calculation thus reducing the calculation time
 SN curves for failure probabilities between 0 and 100% can be created
 Multiaxial Calculation
 Method used when several loadings have an effect on a structure and are not in sync, and not proportional
 Up to 100 loadings working independently can be taken into account
 Should be used if the principal stress directions vary considerably in the component as the calculation is very time consuming
 Applications: bodywork structures, axle components, crankshafts, rotary blades for wind power stations
 Strain measurement data can be used
