Structural health monitoring techniques (SHM) for material damage identification have
demonstrated higher sensitivity and accuracy when relying on the assessment of nonlinear …

Thermosonics, also known as ultrasonic stimulated thermography, is a rapid non-destructive
evaluation technique that uses an infrared camera to visualise material defects by detecting …

Applying highly accurate clamp loads in bolted joints during assembly and inspections is
essential for estimation of the integrity of a joint and reduction of disastrous failures. Non …

The influence of porosity on the mechanical behaviour of composite laminates represents a
complex problem that involves many variables. Therefore, the evaluation of the type and …

Discovery and evaluation concerns of barely visible impact damage in composite materials
is a well-known issue in industries using these materials. This work proposes a frequency …

Linear and nonlinear ultrasound imaging methods highlight different damage features: the
linear method detects large stiffness changes, while the nonlinear technique identifies small …

Nonlinear ultrasonic techniques rely on the measurement of nonlinear elastic effects caused
by the interaction of ultrasonic waves with the material damage, and have shown high …

Self-healing composites using a thermally mendable polymer, based on Diels–Alder
reaction were fabricated and subjected to various multiple damage loads. Unlike traditional …

Structural health monitoring has become an important factor in the assessment of
defects/damage in material components. Ultrasonic methods generally incorporate a sparse …

This work evaluates various nonlinear ultrasound methods for in situ structural health
monitoring of the loosened state of a four-bolt structure found on large-scale wind turbines …