Magnetic Mixing Detection Method for Early Fatigue Damage of Ferromagnetic Materials

Monitoring fatigue damage in materials using magnetic measurement techniques

Damage Detection of Composite Materials with LAMB Wave Method

The aim of the experimental study described in this paper was Lamb wave method evaluation for damage/ defects detection of epoxi/glass composites. Can be used piezoelectric transducers actuator/sensor glued on the surface of investigated composite, using transmission mode. The chosen control parameter was the sensor signal attenuation because of defects that exists in examinated samples. The pr...

A Micromechanics Damage Approach for Fatigue of Composite Materials

A new model for fatigue damage evolution of polymer matrix composites is presented. The model is based on a combination of an orthotropic damage model and an isotropic fatigue evolution model. The orthotropic damage model is used to predict the orthotropic damage evolution within a single cycle. The isotropic fatigue model is used to predict the magnitude of fatigue damage accumulated as a func...

Electromagnetic Detection of Fatigue Cracks under Protruding Head Ferromagnetic Fasteners

The detection of fatigue cracks under installed fasteners has been a major goal of the aging aircraft NDE community. The Sliding Probe, Magneto-Optic Imager, Rotating Self-Nulling Probe, Low Frequency Eddy Current Array, and Eddyscan systems are among the instruments developed for this inspection. It has been verified that the detection of fatigue cracks under flush head aluminum and titanium f...

Inertial and magnetic sensing of human movement near ferromagnetic materials

This paper describes a Kalman filter design to estimate orientation of human body segments by fusing gyroscope, accelerometer and magnetometer signals. Ferromagnetic materials near the sensor disturb the local magnetic field and therefore the orientation estimation. The magnetic disturbance can be detected by looking at the total magnetic density and a magnetic disturbance vector can be calcula...