Laboratory for Dynamics of Machines and Structures 
Thermoelasticity-based modal damage identification
 L. Capponi, J. Slavič, G. Rossi and M. Boltežar
International Journal of Fatigue (2020)

download pdf   doi.org/10.1016/j.ijfatigue.2020.105661
Abstract
The response of linear dynamic structures can be decomposed into modal components, where each natural frequency is also represented by a corresponding mode shape and damping ratio. While vibration-fatigue-damage identification was recently expanded using modal decomposition, this research proposes a modal-decomposition-based thermoelastic damage identification method. With the proposed method, a thermal camera can be used to identify the damage intensity of a particular mode shape. The proposed method is presented using a randomly excited structure exposed to multiaxial loads. With this, the intensity of a particular fatigue source is clearly related to the underlying structural dynamics.
Authors


Lorenzo Capponi,

  University of Perugia, Department of Engineering
  
  

Professor

Janko Slavič, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  janko.slavic@fs.uni-lj.si
  +386 1 4771 226
jankoslavic     jankoslavic    
Scholar Home Xs

Professor

Gianluca Rossi, PhD

  University of Perugia, Department of Engineering
  
  

Professor

Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
Scholar Home Xs