Angel Arias - Academia.edu (original) (raw)

Papers by Angel Arias

Chinese Physics C, 2010

A precise measurement of the cross section of the process e þ e À ! þ À ðÞ from threshold to an e... more A precise measurement of the cross section of the process e þ e À ! þ À ðÞ from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method using 232 fb À1 of data collected

Mechanical behaviour of TRIP steels subjected to low impact velocity at wide range of temperature... more Mechanical behaviour of TRIP steels subjected to low impact velocity at wide range of temperatures J. A. Rodriguez-Martinez, A. Rusinek, D. A. Pedroche, A. Arias, J. R. Klepaczko 1 Department of Continuum Mechanics and Structural Analysis, University Carlos III of Madrid, Avda. de la Universidad 30, 28911 Leganes, Madrid, Spain Laboratory of Physics and Mechanics of Materials, UMR CNRS 7554, University Paul Verlaine of Metz, Ile du Saulcy, 57000 Metz, France

Boletin De Informacion Sobre Las Comunidades Europeas, 1987

Rutas Revista De La Asociacion Tecnica De Carreteras, 2008

Revista De Obras Publicas Organo Profesional De Los Ingenieros De Caminos Canales Y Puertos, Jul 1, 2008

The Third Millennium Bridge cross the Ebro river to the west of Zaragoza is the main vehicles acc... more The Third Millennium Bridge cross the Ebro river to the west of Zaragoza is the main vehicles access to International Exposition of this year 2008. Probably, this structure will become a international reference in bridge engineering for many reasons. The quality of the design, structural and aesthetical, the size, the technical innovations in materials and construction systems can be emphasized among other things.

Cauce 2000 Revista De La Ingenieria Civil, 2008

Industria Y Mineria, 2004

CISM International Centre for Mechanical Sciences, 2014

The high cost of the energy needed to propel aircraft and ground vehicles has meant that reducing... more The high cost of the energy needed to propel aircraft and ground vehicles has meant that reducing the weight in these systems is vital in order to reduce operational costs. This factor has a significant influence on the design of structures in the aeronautical industry and more recently in others such as high-speed rail networks and road haulage. This is a particularly sensitive issue for the civil aviation industry, given that the cost of fuel is one of the main expenses incurred by passenger airlines. Bearing in mind that fuel represents up to 40% of the total weight of an aircraft, a reduction of its weight results in a concurrent reduction in the amount of fuel needed as well as a significant reduction of the gross weight taken into account.

ESIC Market, 1979

Biblioteca de la Universidad Complutense de Madrid, Base de datos de artículos de revistas, ...

Mechanics of Materials, 2011

In this work a dislocation based constitutive description for modeling the thermo visco plastic b... more In this work a dislocation based constitutive description for modeling the thermo visco plastic behavior of FCC metals has been developed. The constitutive description, which is founded on the concepts of thermal activation analysis and dislocation dynamics, assumes the plastic flow additively decomposed into internal stress and effective stress. The internal stress represents the applied stress required for the transmission of plastic flow between the polycrystal grains and it is defined by the Hall Petch relationship. The effective stress formulation, which is the main innovative feature of this work, represents the thermally activated deformation behavior. This is defined taking into account the interrelationship between strain rate and temperature, and gathers structural evolution dependence. This structural evolution is described as a function of dislocations density, which acts as internal state variable in the material deformation behavior. A systematic procedure for identifica tion of the material parameters is developed and the model is applied to define the behav ior of annealed OFHC copper. The analytical predictions of the constitutive description are compared with the experimental data reported by Nemat Nasser and Li (Nemat Nasser, S., Li, Y., (1998). Flow stress of FCC polycrystals with application to OFHC Copper. Acta Mater. 46, 565 577). Good correlation between experiments and analytical predictions is found within wide ranges of strain rate and temperature.

International Journal of Impact Engineering, 2010

This paper is dedicated to Prof. Janusz Roman Klepaczko who passed away in August 15, 2008. We pa... more This paper is dedicated to Prof. Janusz Roman Klepaczko who passed away in August 15, 2008. We pay our tribute to him for his teaching and contribution to dynamic failure of metals. Prof. Klepaczko was involved at the beginning of this investigation.

Experimental Mechanics, 2014

This paper presents an experimental investigation on the perforation behaviour of 5754-H111 and 6... more This paper presents an experimental investigation on the perforation behaviour of 5754-H111 and 6082-T6 aluminium alloys. The mechanical response of these materials has been characterized in compression with strain rates in the range of 10 −3 s −1 <ε < 5 • 10 3 s −1. Moreover, penetration tests have been conducted on 5754-H111 and 6082-T6 plates of 4 mm thickness using conical, hemispherical and blunt projectiles. The perforation experiments covered impact velocities in the range of 50 m/s < V 0 < 200 m/s. The initial and residual velocities of the projectile were measured and the ballistic limit velocity obtained for the two aluminium alloys for the different nose shapes. Failure mode and post-mortem deflection of the plates have been examined and the perforation mechanisms associated to each projectile/target configuration investigated. It has been shown that the energy absorption capacity of the impacted plates is the result of the collective role played by target material behaviour, projectile nose shape and impact velocity in the penetration mechanisms.

Journal de Physique IV (Proceedings), 2006

The test known as "quasi-oedometric compression" consists of the compression of a cylindrical spe... more The test known as "quasi-oedometric compression" consists of the compression of a cylindrical specimen confined in a thick vessel. In this work, an original methodology is proposed to deduce the radial stress and strain within the specimen using hoop strains measured on the external surface of the vessel, taking into account its elasto-plastic deformation. On one hand the spherical and deviatoric behaviours of two concretes are deduced. On the other hand, their ballistic behaviour is analysed using impact tests. These experiments are simulated numerically by the plasticity model of Krieg, Swenson and Taylor, and the features of the model are identified by the previous confined compression tests. The capacity of the model to describe the ballistic behaviour of such materials is shown in a comparison of the numerical simulations with the ballistic tests.

Journal de Physique IV (Proceedings), 2003

A new material composed of a polymer matrix loaded with ceramic particles, at low cost and of hig... more A new material composed of a polymer matrix loaded with ceramic particles, at low cost and of higher ballistic efficiency than that of the metallic materials used for armouring applications, is proposed as an alternative to the ceramic tiles traditionally adopted for mixed panels. An engineering model was developed to simulate normal impacts of projectiles against this particulate composite backed by a metallic plate. The equation governing the erosion of projectile and ceramic is that proposed by Tate and Alekseevskii, modified to consider a moving target. For the volume of particulate composite between the projectile and the metallic plate, an equation was derived to include a momentum balance. For the metallic plate, an energy balance equation was used. When the projectile has eliminated the ceramic/polymer composite and meets the plate, the model of Awerbuch & Bodner is adopted, again modified to consider a moving target. In this way, the impact process is described by a set of non-linear differential equations, to be integrated in time. The model was validated with experimental results and with full numerical simulations and showed agreement with both of them.

Proceedings of the 7th …, 2007

The objectives of this paper are to present a simulator program of a robot of two degrees of free... more The objectives of this paper are to present a simulator program of a robot of two degrees of freedom and introduce a new controller scheme on joint space. The simulator is designed based on the dynamic model of the prototype and using a controller with stability proof we can locate the end-effector of the robot in a specific point. The kind of control that we use to programming the simulator is the position control type.

Applied Sciences

This review focuses on novel applications based on multifunctional materials to actuate biologica... more This review focuses on novel applications based on multifunctional materials to actuate biological processes. The first section of the work revisits the current knowledge on mechanically dependent biological processes across several scales from subcellular and cellular level to the cell-collective scale (continuum approaches). This analysis presents a wide variety of mechanically dependent biological processes on nervous system behaviour; bone development and healing; collective cell migration. In the second section, this review presents recent advances in smart materials suitable for use as cell substrates or scaffolds, with a special focus on magneto-active polymers (MAPs). Throughout the manuscript, both experimental and computational methodologies applied to the different treated topics are reviewed. Finally, the use of smart polymeric materials in bioengineering applications is discussed.

Metals

Under impact loading conditions, the stress state derived from the contact between the projectile... more Under impact loading conditions, the stress state derived from the contact between the projectile and the target, as well as from the subsequent mechanical waves, is a variable of great interest. The geometry of the projectile plays a dertermining role in the resulting stress state in the targeted structure. In this regard, different stress states lead to different failure modes. In this work, we analyze the influence of the stress state on the deformation and failure behaviors of three aluminum alloys that are commonly used in the aeronautical, naval, and automotive industries. To this purpose, tension-torsion tests are performed covering a wide range of stress triaxialities and Lode parameters. Secondly, the observations from these static tests are compared to failure mode of the same materials at high impact velocities tests with the aim of analysing the role of stress state and strain rate in the mechanical response of the aluminum plates. Experimental impacts are conducted with different projectile geometries to allow for the analysis of stress states influence. In addition, these experiments are simulated by using finite element models to evaluate the predictive capability of three failure criteria: critical plastic deformation, Johnson-Cook, and Bai-Wierzbicki.

Cauce 2000 Revista De La Ingenieria Civil Issn 0212 761x 2008 06 Vol N 141, Jun 1, 2008

Composite Interfaces, 2015