Fatigue


GlyphWorks provides the industry-leading fatigue analysis technology you need to calculate fatigue life from measured data. You can correct for mean stress and surface finish effects, even back calculate from each data channel to determine a scale or fatigue concentration factor required to achieve a target life. You can then review damage histograms to determine which load cycles were most damaging, and even output damage time histories to show exactly when the damage occurred. A database with commonly used fatigue data is also provided.
Stress-Life method uses a nominal stress approach for high-cycle conditions or non-metallic applications. A wide range of methods is provided for defining the SN curves including the ability to interpolate multiple material data curves for mean stress effects. For ultimate flexibility, Python scripting enables the definition of custom fatigue methods and material models.
Strain-Life method is more appropriate for more severe loading conditions (low-cycle fatigue) where local elastic-plastic strain controls the fatigue life. Supported methods include the Coffin-Manson- Basquin formula with additional mean stress corrections such as Morrow and Smith-Watson-Topper.
Crack Growth provides linear elastic fracture mechanics to determine how a crack will propagate after initiation. Complete fracture mechanics is performed using industry standard methodologies, an open environment for users to embed their own algorithms – and advanced reporting and quality assurance capabilities. Built-in growth laws include NASGRO3, Forman, Paris, Walker, and more.
Creep Analysis performs creep calculation for time in hours to rupture - typically occurring at temperatures above 30% of the melting point (in Kelvin). Supported methods include Larson-Miller which uses a creep curve that is either paired points X-Y curve or polynomial function and Chaboche method using a family of curves, each for a specific temperature.
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