The goal of this contribution is the development and configuration of a simulation scenario for 2-D (radioscopic) and 3-D (computed tomography) X-ray inspection setups for CFRP aerostructures. Characteristics taken into account are object shape, defect types, their form and spectral properties. The simulations are carried out using analytical simulation software. The simulation procedure and pr...

Acoustic fatigue failures in aircraft are caused by the dynamic response of structures to unsteady pressure loading from aerodynamic and engine acoustic sources. Structural life is difficult to assess accurately and maybe affected by steady, thermal, in-plane and out-of-plane panel loads. These failures result in increased maintenance and inspection burdens associated with the operation of the ...

The HEPHAISTOS system integrates advantageously the basic processing steps as tooling, tempering of the resin and lay up, the impregnation of the fibers, pre-forming techniques as well as finally the process curing of the composite structures. Composites for aerospace applications in prepreg and wet technology have been successfully fabricated and investigated for quality and certification issu...

The response of moment resisting frame structures to seismic excitation is strongly dependent on the ability of particular structural members to sustain relatively large inelastic deformations without significant degradation of lateral and axial load-carrying capacity. Conventional reinforced concrete frame structures are typically designed according to the strong column/weak beam concept, whic...

three unconventional details for plastic hinges of bridge columns subjected to seismic loads were developed, designed, and implemented in a large-scale, four-span reinforced concrete bridge. shape memory alloys (sma), special engineered cementitious composites (ecc), elastomeric pads embedded into columns, and post-tensioning were used in three different piers. the bridge model was subjected to...

OBJECTIVE To review the epidemiologic literature on styrene and cancer. METHODS We reviewed studies of workers exposed to styrene in manufacturing and polymerization, in the reinforced plastics industry, and in styrene-butadiene rubber production. We also reviewed studies of workers monitored for styrene exposure, studies of environmental exposure, community-based case-control studies of lymp...

Guided-wave structural health monitoring (SHM) systems with piezoelectric sensors are investigated for localisation of barely visible impact damage in CFRP plates under vibration and different thermal conditions. A single baseline set is used in a delay-and-sum algorithm with temperature correction for damage localisation in a large temperature range. Damage localisation is also demonstrated un...

In pre-stressed concrete structures, consideration is being given to replacing the steel tendons with CFRP rods. One of the challenges associated with this is to develop a suitable anchorage for the CFRP rods. A bonded anchorage was investigated, where the CFRP is potted in a steel tube using epoxy adhesive. Experimental static tests of different configurations were undertaken with failure occu...

It has long been known that summertime fronts in southeastern Australia show pronounced diurnal changes in intensity, movement and times of arrival. As long ago as the 1940s this behaviour was linked to the coastal thermal and frictional gradient (Cassidy 1945; Loewe 1945). A series of field studies in the 1950s (Berson et al. 1957, 1959; Clarke 1961) demonstrated diurnal variations in speed an...

The paper provides mathematical modelling for prefabricated timber-framed walls composed of a timber frame and two different types of sheathing boards. Since by wood-based boards (WBB) the tensile strength is similar to the compressive one, there are practically no cracks appearing in the boards. On the other hand, in case of fibre-plaster sheathing boards (FPB) the tensile strength is approxim...