Power electronic modules undergo electro-thermal stresses due to power losses that lead to several kinds of degradations, and finally to failure. In order to prevent power electronic module failure, one should assess its state of health in realtime operation. For this purpose, Prognostics and Health Management (PHM) approach could be a promising to...
Published in Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine
Cortical bone fracture mechanisms are well studied under quasi-static loading. The influence of strain rate on crack propagation mechanisms needs to be better understood, however. We have previously shown that several aspects of the bone micro-structure are involved in crack propagation, such as the complete porosity network, including the Haversia...
When reinforcing existing cracked asphalt pavements, the design and evaluation of the durability of the reinforced structure are quite different from those of a new pavement generally based on fatigue criteria deduced from stress and strain fields computed for the undamaged pavement. For the design of reinforcement solutions, the presence of cracks...
The failure of fibers inside the yarns of 3D woven carbon/epoxy composites is investigated experimentally by estimating the critical energy release rate GC, through the analysis of Compact Tension (CT) and Single Edge Notched Beam (SENB) specimens. Close attention is paid to the specimen design as well as the tracking of the crack growth. Several d...
A high-Mn austenitic steel represents excellent combination of tensile strength and ductility, but shows very low yield strength. To increase the yield strength, pre-deformation is applied before use. However, the other properties such as fatigue resistance should also remain high. In this study the influence of pre-strain on tensile and low cycle ...
Published in Materials and Structures
Preoccupation for improving concrete infrastructure durability has become just as important as safety issues and concrete cracking plays a key role for durability. Despite various studies carried out in the last decade, very little information regarding the propagation of cracking under sustained loading and the physical mechanisms involved is avai...
Dry-snow slab avalanches are generally caused by a sequence of fracture processes including (1) failure initiation in a weak snow layer underlying a cohesive slab, (2) crack propagation within the weak layer and (3) tensile fracture through the slab which leads to its detachment. During the past decades, theoretical and experimental work has gradua...
Published in Materials and Structures
The time–temperature superposition principle (TTSP) is known to be valid in the small strain domain where the behaviour of bituminous mixtures is linear viscoelastic (LVE). The behaviour is then called thermorheologically simple. In this work, an experimental campaign was performed at University of Lyon/ENTPE (France) to check the validity of the T...
