Nonlinear Elastic Waves for Evaluation of Composite Material Deterioration

• Published in: Engineering Transactions
• Main Authors: Rolf LAMMERING, Natalie RAUTER
• Format: Article
• Language: English
• Published: Institute of Fundamental Technological Research Polish Academy of Sciences 2016-11-01
• Subjects: nonlinear elastic waves; material deterioration; hyper-elasticity
• Online Access: https://et.ippt.pan.pl/index.php/et/article/view/722

This work deals with numerical investigations on nonlinear wave propagation in order to detect micro-damage in composite material. For this purpose two models are under consideration. First, a wave guide with linear-elastic material behavior with and without a crack is analyzed. The nonlinearity of this model is due to the strain tensor as well as the contact of the crack surfaces. Secondly, a hyper-elastic waveguide with a nonlinear constitutive description is considered. It is shown, that the nonlinearity gives rise to second harmonic wave modes which which may be considered as an indicator of micro-damage and material deterioration.