Publications associées à Experimental and Analytical Investigation of Deflection of R-UHPFRC Beams Subjected to Loading-Unloading

Publications associées (19)

Improved Material Formulations for Thick Adhesive Joints in Wind Turbine Blades

Wind turbine rotor blades are usually fabricated using composite materials and epoxy adhesive to bond the elements together. Due to their large size, the thickness of the adhesive layer varies from 1 to up to 30 mm depending on the position. The failure of ...

EPFL2024

Experimental and numerical evaluation of a U-shaped thin lightly reinforced concrete wall tested under cyclic loading

Katrin Beyer

Reinforced concrete walls provide effective bracing against seismic lateral loading for buildings worldwide. In Latin America, seismic design provisions commonly adhere to the ACI 318 building code, which is predominantly based on United States constructio ...

2024

Tensile Properties of Ex-Situ Ti-TiC Metal Matrix Composites Manufactured by Laser Powder Bed Fusion

Roland Logé

Titanium-based Metal Matrix Composites (MMCs) manufactured by additive manufacturing offer tremendous lightweighting opportunities. However, processing the high reinforcement contents needed to substantially improve elastic modulus while conserving signifi ...

2024

Uniaxial Cyclic and Tensile Tests on Structural Metallic Materials

Dimitrios Lignos, Albano António De Abreu E Presa De Castro E Sousa, Selimcan Ozden

Experimental data is imperative to characterize the behavior of materials used in structural analysis models. The aim of this data paper is to establish a database of material-scale uniaxial experiments, primarily conducted at EPFL, to assist with simulati ...

ASCE-AMER SOC CIVIL ENGINEERS2023

A theoretical framework for dynamic anticrack and supershear propagation in snow slab avalanches

Marin Mathieu Siron, Bertil Trottet

Snow slab avalanches release after the failure and collapse of a weak layer buried below a cohesive snow slab. The initial failure is induced by local overloading of the slab, such that the passage of a skier. This results in the propagation of a subsidenc ...

PERGAMON-ELSEVIER SCIENCE LTD2023

The challenges of quasi-static and fatigue experiments of structural adhesives

Anastasios Vassilopoulos

This paper presents the results of an experimental campaign designed specifically to investigate unexpected and unwanted failures observed during the quasi-static and fatigue tensile loading of structural adhesives. Simple finite element models were also d ...

ELSEVIER SCI LTD2022

How hidden 3D structure within crack fronts reveals energy balance

John Martin Kolinski

Griffith's energetic criterion, or 'energy balance', has for a century formed the basis for fracture mechanics; the energy flowing into a crack front is precisely balanced by the dissipation (fracture energy) at the front. If the crack front structure is n ...

PERGAMON-ELSEVIER SCIENCE LTD2022

Experimental evaluation and modeling of fatigue of a 316L austenitic stainless steel in high-temperature water and air environments

Wen Chen, Wen Chen

Austenitic stainless steels is used in many components of nuclear power plants, particularly in the pipes of cooling systems. Owing to power transients and to start-ups and shutdowns, these components are subjected to thermo-mechanical loadings (low-cycle ...

EPFL2020

Stress fields for the interaction of in-plane and out-of-plane forces in reinforced concrete shell elements

Marie-Rose Backes

Plane reinforced concrete (RC) elements are used in a large variety of structures. Their principal function is to carry forces that act in the plane of the element, but external actions and connections to other structural elements generally introduce addit ...

EPFL2017

Dynamic crack propagation with a variational phase-field model: limiting speed, crack branching and velocity-toughening mechanisms

Jean-François Molinari, Jérémy Bleyer

We address the simulation of dynamic crack propagation in brittle materials using a regularized phase-field description, which can also be interpreted as a damage-gradient model. Benefiting from a variational framework, the dynamic evolution of the mechani ...

2017

Quasi-static and dynamic fracture behaviour of rock materials: phenomena and mechanisms

Jian Zhao, Qianbing Zhang

An experimental investigation is conducted to study the quasi-static and dynamic fracture behaviour of sedimentary, igneous and metamorphic rocks. The notched semi-circular bending method has been employed to determine fracture parameters over a wide range ...

Springer Verlag2014

Failure analysis of edge flat-slab column connections with shear reinforcement

Dan Vasile Bompa, Aurelio Muttoni

Flat-slab column connections are susceptible to brittle failure, which lead to the necessity of improving ductility and ultimate strength. In case of edge connections, the behaviour at ultimate state is highly influenced by nonsymmetrical distribution of s ...

fib Symposium Tel-Aviv 20132013

Discrete dislocation modeling of fracture in plastically anisotropic metals

William Curtin

The intrinsic lattice resistance to dislocation motion, or Peierls stress, depends on the core structure of the dislocation and is one essential feature controlling plastic anisotropy in materials such as HCP Zn, Mg, and Ti. Here, we implement an anisotrop ...

Pergamon-Elsevier Science Ltd2013

Effect of load distribution and variable depth on shear resistance of slender beams without stirrups

Aurelio Muttoni, Miguel Fernández Ruiz

The shear resistance of elements without stirrups has mainly been investigated by test setups involving simply supported beams of constant thickness subjected to one- or two-point loading, and most of the formulas included in codes have been adjusted using ...

ACI Structural Journal2012

Influence of the meso-structure in dynamic fracture simulation of concrete under tensile loading

Jean-François Molinari, Leonardo Snozzi

We investigate the dynamic behavior of concrete in relation to its composition within a computational framework (FEM). Concrete is modeled using a meso-mechanical approach in which aggregates and mortar are represented explicitly. Both continuum phases are ...

Pergamon-Elsevier Science Ltd2011

Micromechanical Study of Rock Fracture and Fragmentation under Dynamic Loads using Discrete Element Method

Tohid Kazerani

The study presented in this thesis aims to numerically explore the micro-mechanisms underlying rock fracture and fragmentation under dynamic loading. The approach adopted is based on the Discrete Element Method (DEM) coupled to the Cohesive Process Zone (C ...

EPFL2011

Structural implications of ultra-high performance fibre-reinforced concrete in bridge design

Ana Spasojevic

The present research represents a theoretical and experimental contribution to the understanding of the structural behaviour of elements made of ultra-high performance fibre-reinforced concrete (UHPFRC). UHPFRC is investigated as an advanced cementitious m ...

EPFL2008

Fracture properties of notched and pre-cracked specimens of a tempered martensitic steel at low temperature

Philippe Spätig, Raul Alejandro Bonadé

The fracture properties of the 9CrWVTa reduced-activation tempered martensitic steel Eurofer97 were studied in the lower ductile to brittle transition. Sub-sized pre-cracked compact tension and notched tensile specimens were tested. Finite element simulati ...

2008

Flexural behavior of a hybrid FRP and lightweight concrete sandwich bridge deck

Thomas Keller, Till Vallée, Erika Schaumann

This paper presents a new concept for a lightweight hybrid- FRP bridge deck. The sandwich construction consists of three layers: a fiber-reinforced polymer composite (FRP) sheet with T-upstands for the tensile skin, lightweight concrete (LC) for the core a ...

2007