Frederic Robache

• Polytechnic University of Hauts-de-France

Surfaces are the privileged places of interaction between physical phenomena and objects. Roughness studies, especially when performing multiscale analysis, are tools of choice to understand physical phenomena and their scales of application. However, profilometers, especially optical systems, must compromise between field of measurement and resolu...

Distinguishing between right-handed and left-handed painters in the realm of painting is a question approached from various angles across different disciplines. Each approach, whether it's from neuropsychology, the study of the artwork itself, or the artist's imprint on the work, contributes insights to the burning question of whether the myth of t...

Identification of an individual artist’s touch on paintings is studied using surface metrology. Paintings’ topographies were measured using focus variation and stitching, creating 13 × 13 mm maps with 1 μm sampling intervals, and 169 megapixels, with a 10X objective lens. Topographic characterization parameters were analyzed for their ability to di...

There is a growing interest in cultural heritage preservation. The notion of HyperHeritage highlights the creation of new means of communication for the perception and data processing in cultural heritage. This article presents the Digital Surface HyperHeritage approach, an academic project to identify the topography of art painting surfaces at the...

Surface gradient characterization by light reflectance (SGCLR) is used for the first time for multiscale curvature calculations and discrimination of worn surfaces on six damaged ceramic–metal composites. Measurements are made using reflectance transformation imaging (RTI). Slope and curvature maps, generated from RTI, are analyzed instead of heigh...

This paper deals with the modelling of damageable viscous behaviour of short-fibre reinforced composites (SFRC) with complex distributions of fibre orientations and for a wide range of strain rate. In the present model, the composite material is seen as the assembly of a matrix medium and several linear elastic fibre media. Then, the computation of...

Les constructeurs automobiles sont tenus de respecter des minima sécuritaires vérifiés lors de crash-tests normalisés, d'où un nombre de scénarios de tests limité ne tenant pas compte des particularités individuelles. Ce mémoire propose d'évaluer le comportement humain réel en phase de pré-crash sur simulateur de conduite. L'expérimentation, intégr...

Automakers are lawfully required to achieve a minimum level of security which is checked during standardized crash tests. This results in a limited number of scenarios, which do not take individual specificities into account. This dissertation evaluates real human behaviour during the pre-crash phase, by means of a driving simulator. The experiment...

Short-fibre-reinforced thermoplastic polymers (SFRT) are appealing materials for use in technical applications, due to high rigidity/density ratio, in particular. However, SFRT have complex anisotropic mechanical behaviour, because of specificities of thermoplastic matrix behaviour and heterogeneous reinforcement characteristics, in particular in t...

The tremendous growth of imaging applications for mechanical engineering increases the amount of image and video data used to capture the microstructural characteristics or mechanical behavior of materials as a sequence of frames. In this paper, we evaluate the performance of the new state-of-the-art High Efficiency Video Coding (HEVC) standard to...

This paper discusses driver's emergency avoiding behavior while he or she is driving a car in a rural area. Based on behavioral data obtained from an experiment conducted in France with a high-fidelity driving simulator, the authors analyzed the driver behavior just before the collision. The results showed that the drivers tended to choose a “ratio...

This paper discusses driver's emergency avoiding behavior while he or she is driving a car. Based on behavioral data obtained from an experiment conducted in France with a high-fidelity driving simulator, we analyzed the driver behavior just before the collision. The results showed that the drivers tended to choose a "rational" behavior to avoid th...

This two-part paper described the results of the research programme PROCAB for train driver protection during rail collisions. In Part I, a methodology was proposed to analyse driver survivability in train crash. Appropriate experimental devices and associated numerical models were developed which were able to reproduce the loads and accelerations...

This two-part paper described the results of the research programme PROCAB (French acronym for PROtection CABine) for train driver protection in rail collisions. In the part I, virtual and physical testing were developed to predict the train driver dynamics and related injuries due to secondary impact with cabin furniture. The conclusion was that t...

This paper discusses driver's emergency avoiding behavior while he or she is driving a car. Based on behavioral data obtained from an experiment conducted in France with a high-fidelity driving simulator, we analyzed the driver behavior just before the collision. The results showed that the drivers tended to choose a "rational" behavior to avoid th...

This paper considers pre-impact vehicle maneuvers and analyzes the resulting driver motion from their comfort seating position. Part I of this work consists of analyzing the driver behavior during a crash. The study is conducted using the LAMIH driving simulator and involves 76 participants. The emergency situation is created by a truck emerging fr...

This paper considers pre-impact vehicle maneuvers and analyzes the resulting driver motion from their comfort seating position. Part I of this work consisted of analyzing the driver behavior during a simulated crash in a car driving simulator. The configuration of the virtual accident led to an unavoidable frontal crash with a truck. The typical re...

This paper presents an approach to analyze drivers' behaviours during critical events using a driving simulator and to estimate the dynamic responses of drivers by means of numerical simulation. The first part of this work is to present the experimental results obtained from 35 subject responses. A scenario of an unavoidable crash is created in the...

For years, automotive engineers have been working to improve vehicle safety by using dummies, human corpses and animals to test safety systems. However, in most cases, crash tests do not consider drivers differences, much less their reactions. In reality, no one can make real crash tests with living drivers. Current approach is to simulate crashes...

This paper presents the first experiment managed as part of the Sciences and Technologies for Safety in Transport (ST2) program, a French national research project. In this program, human physical reactions are studied in order to adapt primary and secondary safety systems to driver behavior. The objective of the present study was to examine how ca...