People

Josep I. Rojas

Lecturer

Escola d'Enginyeria de Telecomunicació i Aeroespacial de Castelldefels
Universitat Politècnica de Catalunya
Esteve Terradas 7, 08860-Castelldefels - SPAIN

Phone: ++34 934 134 130
FAX: ++34 934 137 007
Email: josep.ignasi.rojas(@)upc.edu

 

Research interests


Materials science. Viscoelasticity, internal friction/mechanical relaxation phenomena, creep and fatigue response in aluminum alloys. Wind energy. Earthquake precursors.

Publications

An Experimental and Numerical Study of Repairs on Composite Substrates with Composite and Aluminum Doublers Using Riveted, Bonded, and Hybrid Joints
Siddharth Pitta, Francesc Roure, Daniel Crespo, Jose I. Rojas
Materials 12 (2019) 2978
DOI: https://doi.org/10.3390/ma12182978

On the static strength of aluminium and carbon fibre aircraft lap joint repairs
Siddharth Pitta, Victor de la Mora Carles, Francesc Roure, Daniel Crespo, Jose I. Rojas
Composite Structures 201 (2018) 276-290
DOI: https://doi.org/10.1016/j.compstruct.2018.06.002

Viscoelastic behavior of a novel aluminum metal matrix composite and comparison with pure aluminum, aluminum alloys, and a composite made of Al–Mg–Si alloy reinforced with SiC particles
Jose I. Rojas, Bathula Venkata Siva, Kanai Lal Sahoo, Daniel Crespo
Journal of Alloys and Compounds 744 (2018) 445-452
DOI: https://doi.org/10.1016/j.jallcom.2018.02.103

Comparison of fatigue crack growth of riveted and bonded aircraft lap joints made of Aluminium alloy 2024-T3 substrates – A numerical study
Pitta, S., Rojas, J.I., Crespo, D.
Journal of Physics: Conference Series 843, conference 1 (2017) 12035
DOI: https://doi.org/10.1088/1742-6596/843/1/012035

Dynamic microstructural evolution of an Al–Zn–Mg–Cu alloy (7075) during continuous heating and the influence on the viscoelastic response
Jose I. Rojas & Daniel Crespo
Materials Characterization 134 (2017) 319-328
DOI: 10.1016/j.matchar.2017.11.018

Study on Mechanical Relaxations of 7075 (Al–Zn–Mg) and 2024 (Al–Cu–Mg) Alloys by Application of the Time-Temperature Superposition Principle
Jose I. Rojas, Jorge Nicolás & Daniel Crespo
Advances in Materials Science and Engineering 2017 (2017) 2602953
DOI: 10.1155/2017/2602953

Onset Frequency of Fatigue Effects in Pure Aluminum and 7075 (AlZnMg) and 2024 (AlCuMg) Alloys
Jose I. Rojas, Daniel Crespo
Metals 6 (2016) 50
DOI: 10.3390/met6030050

Innovative NDT Technique Based on Ferrofluids for Detection of Surface Cracks
J. I. Rojas , B. Cabrera, G. Musterni, J. Nicolas, J. Tristancho, D. Crespo
Journal of Nondestructive Evaluation 34 (2015) 36
DOI: 10.1007/s10921-015-0309-5

An assessment of the sea breeze energy potential using small wind turbines in peri-urban coastal areas
Jordi Mazón, Jose I. Rojas, Jordi Jou, Aaron Valle, David Olmeda, Carlos Sanchez
Journal of Wind Engineering & Industrial Aerodynamics 139 (2015) 1-7
DOI: 10.1016/j.jweia.2015.01.002

Development of a low-cost weather station to measure in situ Essential Climate Variables
Jose I. Rojas, Silvia D. Gilete, Jordi Mazón
Journal of Earth Science and Engineering 4 (2014) 455-463
DOI: 10.17265/2159-581X/2014.08.001

Modeling of the Effect of Temperature, Frequency, and Phase Transformations on the Viscoelastic Properties of AA 7075-T6 and AA 2024-T3 Aluminum Alloys
Jose I. Rojas & Daniel Crespo
Metallurgical and Materials Transactions A 43A (2012) 4633-4646
DOI: 10.1007/s11661-012-1281-7

Effect of temperature and frequency of dynamic loading in the viscoelastic properties of aluminium alloy 7075-T6
Jose I. Rojas, Albert Aguiar & Daniel Crespo
Physica Status Solidi C 8 (2011) 3111–3114
DOI: 10.1002/pssc.201000732

Phase-field modelling of microstructural evolution in primary crystallization
P. Bruna, E. Pineda, J. Rojas & D. Crespo
Journal of Alloys and Compounds 483 (2009) 645–649
DOI: 10.1016/j.jallcom.2008.07.215

Model Rocket Workshop: A Project-Based Learning Experience for Engineering Students
Jose I. Rojas, Xavier Prats, Adeline Montlaur, Enrique Garcia-Berro
International Journal of Emerging Technologies in Learning (iJET) 3 (2008) 70-77
DOI: 10.3991/ijet.v3i4.290

Earthquake Monitoring and Response from Space: The TREMOR Concept
Paul Harrison, Ian Christensen, Emily Coffey, Jason Hochstein, Jose I. Rojas
Conference report (2008)

Socio-economic benefits of using space technologies to monitor and respond to earthquakes
Ian A. Christensen, Lauren E. Fletcher, Jonathan J. Liberda, Jose I. Rojas, Cristina Borrero del Pino & Daniel García Yarnoz
Space Technology 28 (2008) 1–17

Methods of Multivariable Earthquake Precursor Analysis and a Proposed Prototype Earthquake Early Warning System
Lauren E. Fletcher, Ian A. Christensen, Jonathan J. Liberda, José I. Rojas, Cristina Borrero del Pino, Nuria Blanco Delgado
American Geophysical Union, Fall Meeting 2007 abstract S32B-08

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