... include acoustic testing, electromagnetic testing, and radiographic testing. In this work, a direct nondestructive testing based on the calculation of the acoustical eigenvalues is proposed. This study explores the hypothesis that acoustical eigenvalues have information about the surface configuration...

... specimens). Two of the parameters are linear in nature (splitting of modes and frequency shifts) and the third is nonlinear (frequency shift with increase in excitation amplitude). 28 07 2006 06 02 2007 bone nondestructive testing crack detection bioacoustics vibrations acoustic...

... of structural modal parameters to damage. structural damage identification health monitoring vibration-based nondestructive evaluation (NDE) coherence nondestructive testing condition monitoring supports vibrations Kalman filters Overall, the coherence results for the truss...

.... Associate Editor: Chin An Tan. 01 April 2002 01 Oct 2003 04 05 2004 structural acoustics quadratic programming nondestructive testing modal analysis vibrations inverse problems As it often occurs in engineering design, a prototype or an existing structure may show...

... materials vibrations nondestructive testing Advanced composite materials have applications in many areas. However, the mechanical performance of composite materials under damage is very complicated. The tensile strength of composite materials is typically much lower than its compressive strength...

... August 2002 06 01 2003 modal analysis structural acoustics vibration measurement acoustic focusing acoustic variables measurement nondestructive testing Traditional modal testing techniques excite structures by imparting a known force to a structure using an impact hammer...

... damping eigenvalues and eigenfunctions perturbation theory vibrations nondestructive testing finite element analysis The most common method for current structural damage detection programs is through visual inspection. This method is costly and in many cases difficult to perform due...

... Editor: M. I. Friswell. 01 Feb 2000 01 April 2000 vibrations nondestructive testing A wealth of algorithms exists for identifying the existence and location of damage in structural and mechanical systems, such as those reviewed by Doebling et al. 1 2 . At the core...

...; revised March 2000. Associate Technical Editor: K. W. Wang. 01 July 1998 01 March 2000 vibrations dynamic testing matrix algebra nondestructive testing Techniques for damage detection and health monitoring of structural systems are essential to determine their safety...

... structural engineering computing nondestructive testing In several areas of industry, composite materials are now being more progressively substituted for traditional materials, mainly on account of superior corrosion properties, specific weight and stiffness of such materials. This increased...

... nondestructive testing Vibration monitoring techniques have been used for many years to identify damaged structures. More recently, resonant methods based on modal data have been used both to identify that damage exists, and to locate it. Some techniques, such as those by Kashangaki 1 , Hajela...