3,550 research outputs found
Mixed-Mode cohesive model with tensile frictional interaction for the simulation of delamination
Simulation of fracture and delamination in layered shells due to blade cutting
A new isotropic damage cohesive model for the simulation of mixed-mode delamination is presented. The model is based on consideration of the interface internal friction, naturally leading to coupled opening and shear damage mechanisms. Mixed-mode fracture energy turns out to be a direct outcome of the model and does not require the definition of an empirical law, additional to pure Mode I and II fracture energies. The model has been developed to account for delamination processes promoted by blade cutting of carton packages
A mixed-mode cohesive model for delamination with isotropic damage and internal friction
This work deals with the formulation of a thermodynamically consistent, isotropic damage cohesive model for mixed-mode delamination under variable mode ratio. The proposed model is based on the introduction of an internal friction angle in the tensile case, that allows for an accurate modelling of the interaction between normal and shear openings
A thermodynamically consistent cohesive damage model for the simulation of mixed-mode delamination
This work is devoted to the formulation of a new cohesive model for mixed-mode delamination. The model is based on a thermodynamically consistent isotropic damage formulation, with consideration of an internal friction mechanism that governs the interaction between normal and shear opening modes
Selective mass scaling for thin structures discretized with multi-layered, solid-shell elements
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The role of negative maternal affective states and infant temperament in early interactions between infants with cleft lip and their mothers
OBJECTIVES: The study examined the early interaction between mothers and their infants with cleft lip, assessing the role of maternal affective state and expressiveness and differences in infant temperament.
METHODS: Mother-infant interactions were assessed in 25 2-month-old infants with cleft lip and 25 age-matched healthy infants. Self-report and behavioral observations were used to assess maternal depressive symptoms and expressions. Mothers rated infant temperament.
RESULTS: Infants with cleft lip were less engaged and their mothers showed more difficulty in interaction than control group dyads. Mothers of infants with cleft lip displayed more negative affectivity, but did not report more self-rated depressive symptoms than control group mothers. No group differences were found in infant temperament.
CONCLUSIONS: In order to support the mother's experience and facilitate her ongoing parental role, findings highlight the importance of identifying maternal negative affectivity during early interactions, even when they seem have little awareness of their depressive symptoms
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