7 documents found, page 1 of 1
Impact response of different materials for sports mouthguards
Reis, P. N. B.; Amaro, Ana Paula; Neto, Maria Augusta; Messias, Ana; Ramos, João Carlos; Moreira, MariaUp to this moment, there is no guideline regarding the materials to produce mouthguards. The most used is Ethylene-Vinyl Acetate (EVA). Studies indicate that laminating EVA sheets with rigid components could increase the protection capacities of the mouthguards. On the other hand, other studies suggest that only replacement of the material within its structure can increase energy absorption. Therefore, this wor...
The Effect of External Fixator Configurations on the Dynamic Compression Load: ...
Amaro, Ana Martins; Paulino, Maria Fátima; Roseiro, Luís Manuel; Neto, Maria Augusta(1) Objective: External fixation systems are commonly used by surgeons to ensure stabilization and consolidation of bone fractures, especially in patients who are at high risk for systematic complications. Both rigid and elastic external fixations are important in the fracture healing process. This study aims to evaluate the behavior of the Orthofix Limb Reconstruction System (LRS)® in the dynamic compression m...
Effect of Fibre Orientation and Hostile Solutions on Stress Relaxation of Glass...
Reis, Paulo Nobre Balbis Dos; Amaro, Ana Martins; Neto, Maria AugustaPolyamide creates high-performance composite materials, which are replacing the traditional epoxy composites in several applications. In this context, exposure to hostile environments is expected. On the other hand, due to the viscoelastic nature of the matrix, these composite materials are prone to stress relaxation. Therefore, the stress relaxation behaviour of glass/polyamide 6 composites was studied conside...
Sensitivity analysis of flexible multibody systems using composite materials co...
Neto, Maria Augusta; Ambrósio, Jorge A. C.; Leal, Rogério PereiraIn this paper, a general formulation for the computation of the first-order analytical sensitivities based on the direct method using automatic differentiation of flexible multibody systems is presented. The direct method for sensitivity calculation is obtained by differentiating the equations that define the response of the flexible multibody systems of composite materials with respect to the design variables,...
Composite materials in flexible multibody systems
Neto, Maria Augusta; Ambrósio, Jorge A. C.; Leal, Rogério P.In this work the flexible multibody dynamics formulations of complex models are extended to include elastic components made of laminated composite materials. The only limitation for the deformation of a structural member is that it must be elastic and linear when described in a body fixed frame. A finite element model for each flexible body is obtained such that the nodal coordinates are described with respect ...
Optimização de sistemas dinâmicos multicorpo flexíveis em materiais compósitos
Neto, Maria AugustaTese de doutoramento em Engenharia Mecânica (Mecânica Estrutural) apresentada à Fac. de Ciências e Tecnologia de Coimbra; Aguarda-se o resumo do autor.
Flexible Multibody Systems Models Using Composite Materials Components
Neto, Maria Augusta; Ambrósio, Jorge A. C.; Leal, Rogério PereiraThe use of a multibody methodology to describe the large motion of complex systems that experience structural deformations enables to represent the complete system motion, the relative kinematics between the components involved, the deformation of the structural members and the inertia coupling between the large rigid body motion and the system elastodynamics. In this work, the flexible multibody dynamics formu...