Crack Identification using Dynamic Extended Finite Element Method and Thermal Conductivity Engineering for Nanomaterials Identification of flaws in structures is a critical element in the management of maintenance and quality assurance processes in engineering. Nondestructive testing (NDT) techniques based on a wide range of physical principles have been developed and are used in common practice for structural health monitoring. However basic NDT techniques are usually limited in their ability to provide the accurate information on locations dimensions and shapes of flaws. One alternative to extract additional information from the results of NDT is to append it with a computational model that provides detailed analysis of the physical process involved and enables the accurate identification of the flaw parameters. The aim here is to develop the strategies to uniquely identify cracks in two dimensional 2D) structures under dynamic loadings.