This paper presents component-level empirical damage evolution regression models based on loads and damage information that do for mechanical damage prediction what the Paris law does for predicting crack growth under fatigue loading. Namely, these regression models combine information about the current damage state and internal system loads to predict the progress of damage to failure. One of the drawbacks of Paris-like crack evolution laws is that localized information about the loading (stress) and damage (crack length) is required. In structural health monitoring applications, it is not feasible to instrument every potential crack initiation region to collect this localized information. The component-level damage evolution regression models developed here only require global measurements that quantify the damage and loading at the level of the component rather than at the site of damage. This paper develops damage evolution regression models for an automotive sway bar link undergoing axial fatigue loading with two different damage mechanisms at a weldment and at an electrical discharge machining notch. Restoring force diagrams are used to calculate the load indicators as damage progresses and transmissibility functions are used to calculate the damage indicator during tests to failure. A component-level load intensity factor is calculated during these tests so that the rate of damage accumulation can be used to predict the growth of damage and ultimate failure.
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e-mail: mharoon@purdue.edu
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March 2008
Research Papers
Development of Component-Level Damage Evolution Models for Mechanical Prognosis
Muhammad Haroon,
Muhammad Haroon
Research Assistant
Ray W. Herrick Laboratories, School of Mechanical Engineering,
e-mail: mharoon@purdue.edu
Purdue University
, 140 South Intramural Drive, West Lafayette, IN 47907-2031
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Douglas E. Adams
Douglas E. Adams
Associate Professor
Ray W. Herrick Laboratories, School of Mechanical Engineering,
e-mail: deadams@purdue.edu
Purdue University
, 140 South Intramural Drive, West Lafayette, IN 47907-2031
Search for other works by this author on:
Muhammad Haroon
Research Assistant
Ray W. Herrick Laboratories, School of Mechanical Engineering,
Purdue University
, 140 South Intramural Drive, West Lafayette, IN 47907-2031e-mail: mharoon@purdue.edu
Douglas E. Adams
Associate Professor
Ray W. Herrick Laboratories, School of Mechanical Engineering,
Purdue University
, 140 South Intramural Drive, West Lafayette, IN 47907-2031e-mail: deadams@purdue.edu
J. Appl. Mech. Mar 2008, 75(2): 021017 (15 pages)
Published Online: February 26, 2008
Article history
Received:
December 25, 2006
Revised:
August 17, 2007
Published:
February 26, 2008
Citation
Haroon, M., and Adams, D. E. (February 26, 2008). "Development of Component-Level Damage Evolution Models for Mechanical Prognosis." ASME. J. Appl. Mech. March 2008; 75(2): 021017. https://doi.org/10.1115/1.2793137
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