Pierre Margerit

Pierre Margerit
Ecole Nationale Supérieure d'Arts et Métiers | ENSAM · Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM)

About

16
Publications
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55
Citations

Publications

Publications (16)
Poster
Full-text available
Various technologies of in-line reinforcement for extrusion-based 3D printing have been proposed in the recent years. With such techniques, knowledge of the dynamic rheological properties of the extruded material is a key point for several issues, such as its ability to properly impregnate reinforcement, and possibly to pull the reinforcement thank...
Chapter
The issue of reinforcement for 3D concrete printing has received considerable attention, as constructions have to comply with reliability principles and building standards. Here a specific process called Flow-Based Pultrusion for additive manufacturing (FBP), inspired by pultruded composite manufacturing and built on existing extrusion-based 3D pri...
Article
Full-text available
Manufacturing strains and subsequent residual stresses are key elements in the behavior of thin-walled structures, as they induce buckling, warping, and failure. This work proposes a combined experimental and numerical analysis of these features by investigating the additive manufacturing of a thin-walled structure using directed energy deposition....
Preprint
Full-text available
Manufacturing strains and subsequent residual stresses are key elements in the behavior of thin-walled structures, as they induce buckling, warping, and failure. This work proposes a combined experimental and numerical analysis of these features by investigating the additive manufacturing of a thin-walled structure using directed energy deposition....
Article
The response of architectured structures is characterized by multi-scale kinematics, which complex relation and effect on the engineering load response is still not completely understood and therefore needs further investigations. More precisely, the lack of experimental methods enabling to provide multi-scale data remains a key issue. The paper pr...
Article
An original experimental setup, dedicated to the measurement of the dynamic response of structures, is presented. Called the Robotized Laser Doppler Vibrometer (RLDV), it consists in the assembly of a fixed point Laser Doppler Vibrometer (LDV) on a 6-axis industrial robot arm. This allows to measure the 3D velocity on the surface of objects with a...
Article
Full-text available
The multi-scale nature of architectured materials raises the need for advanced experimental methods suitable for the identification of their effective properties, especially when their size is finite and they undergo extreme deformations. The present work demonstrates that state-of-the art image processing methods combined with numerical and analyt...
Article
Full-text available
Mechanical properties of as-printed 316L stainless steel thin-walled structures obtained by directed energy deposition are investigated. In-situ tensile and fracture tests are performed on small samples obtained from a additively manufactured square section tube and extracted with three different orientations with respect to the part build directio...
Preprint
Elastic sheets with architectured cut-outs can be engineered to exhibit unusual mechanical characteristics, such as auxeticity and extreme extensibility. In this work, a combination of experimental and numerical tools is used to shed new light on the deformation patterns of soft auxetic sheets undergoing large tensile and shear strains. A multi-sca...
Article
This paper is concerned with the prediction of the propagation of flexural waves in anisotropic laminated plates with relatively high slenderness ratios by means of refined plate models. The study is conducted using the Bending-Gradient theory which is considered as an extension of the Reissner–Mindlin theory to multilayered plates. Two projections...
Article
Full-text available
The High Resolution Wavevector Analysis (HRWA) is presented and its application illustrated. Extending the High Resolution Wavenumber Analysis method [1] to 2D signals, it allows the wide-band and local characterization of the linear elastic behavior of anisotropic plates. The method belongs to the family of experimental wavenumber-based characteri...
Chapter
The aim of this paper is to discuss the dialectic form-finding of a complex timber structure based on an innovative structural system: shell-nexorade hybrids. Nexorades, also known as reciprocal frames are elegant structures that suffer from a relatively poor structural behavior due to in-plane shear and bending of the members. Introducing plates a...
Thesis
Full-text available
Le présent travail, réalisé dans le cadre du projet ANR MAESSTRO, concerne le remplacement des tables d’harmonie de piano traditionnellement constituées d’épicéa par des structures composites stratifiées. Cette démarche suppose une connaissance fine des matériaux à remplacer et des matériaux de remplacement. La contribution de la thèse consiste don...
Article
The High-Resolution Wavenumber Analysis (HRWA) is presented. It identifies complex wavenumbers and amplitudes of waves composing the harmonic response of a beam. Based on the frequency dependence of these wavenumbers, experimental dispersion equations of various beam mechanisms (e.g bending, torsion) can be retrieved. The HRWA method is compared to...

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Projects

Project (1)
Project
The THINkSHELL project encourages and accompanies expeditions in the field of structural engineering. It promotes an integrated vision of research, education and fabrication which embraces the whole design process from the very first sketches to the construction of full scale buildings, from material/assembly testings to the development of original numerical tools. The team gathered around the development of the first prototypes of elastic gridshells in composite materials. Nowadays, it combines expertise in the field of architecture, material science, structural engineering, historical buildings, architectural geometry and numerical fabrication.