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Title: Prediction of fatigue life with interspersed mode-I and mixed-mode (I and II) overloads by an exponential model: Extensions and improvements
Authors: Mohanty, J R
Verma, B B
Ray, P K
Keywords: Delay cycle
Exponential model
Fatigue life
Fatigue crack growth retardation
Retardation parameters
Issue Date: 2009
Publisher: Elsevier
Citation: Engineering Fracture Mechanics Vol 76, Iss 3, February 2009, P 454-468
Abstract: The current work is an extension of the authors’ earlier work and presents a life prediction methodology under interspersed mode-I and mixed-mode (I and II) overloads. The important controlling parameter in the model is ‘specific growth rate’ (m). It depends on two crack driving forces i.e. stress intensity factor range and maximum stress intensity factor as well as material parameters i.e. fracture toughness, Young’s modulus, and yield stress. The dependence of ‘m’ on these parameters is correlated through a dimensionless parameter ‘l’. It is observed that the present model predicts the end life of post-overload period well in case of 7020 T7 and 2024 T3 Al-alloys.
Description: Copyright for the paper belongs to Elsevier
Appears in Collections:Journal Articles

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