Browsing by Issue Date, starting with "2018-04-20"
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- Design of a composite crash box for a Formula Student team car: preliminary testing and model tuningPublication . Santos, André Miguel Almeida; Araújo, Aurélio Lima; Madeira, JFA; Lopes, Hernâni Miguel ReisIn this work, preliminary studies towards the development of a structural carbon fibre nose for a Formula Student team car are presented. Numerical and experimental approaches have been considered to evaluate the impact behaviour of composite tubes. Then, finite element simulations are used to determine the crush stress by fitting the numerical results to the experimental data. The crush stress is also validated using quasi-static compression tests. The obtained results are compared and discussed in the framework of the future structural nose and crashbox design. The obtained results are compared and discussed in the framework of the future structural nose and crashbox design.
- Durability and shrinkage of concrete with CDW as recycled aggregates: Benefits from superplasticizer’s incorporation and influence of CDW compositionPublication . Bravo, Miguel; De Brito, Jorge; Evangelista, Luis; Pacheco, JoãoThe shrinkage and durability properties of a total of 34 concrete mixes with recycled aggregates produced from different untreated construction and demolition waste (CDW) were tested. The effect of a polycarboxylic superplasticizer on the enhancement of these properties is presented, discussed, and compared with the findings of studies on concrete whose recycled aggregates are sourced from concrete. All properties were significantly affected by recycled aggregate incorporation and this effect was strongly dependent on the properties of the recycled aggregates of each specific source. The superplasticizer was less efficient in mixes with CDW than when the recycled aggregates were produced from concrete, the most common source of recycled aggregates in experimental works, despite untreated CDW being more practical and desirable from an industrial and environmental perspective.