This article presents an experimental investigation carried out to understand the mechanical beha... more This article presents an experimental investigation carried out to understand the mechanical behavior of composite materials made of 3D stitched woven-knitted basalt fabrics. The innovative preforms used consist of two outer layers of a plain woven fabric combined with two inner layers of weft-knitted fabrics. The weft-knitted fabrics selected for the study were varied plain knit, 1 × 1 rib, Milano, and interlock. The fabric layers were stitched together with Kevlar yarns. These 3D stitched preforms were impregnated with polyester resin using resin transfer molding, and the corresponding composites obtained were tested under tensile, bending, and impact loads. The results obtained show that the type of knitted structure significantly influences the mechanical performance of the 3D stitched woven-knitted composites. The composite using interlock structure as the inner layers has the best results concerning energy absorption and tensile strength. The varied plain knit structure has pr...
Abstract This work reports on research being carried out in the area of functional knitted fabric... more Abstract This work reports on research being carried out in the area of functional knitted fabrics with a special structure incorporating hydrophobic fibres near to the skin and suction channels of hydrophilic fibres to suck moisture from the skin on the hydrophilic layer away ...
this article aims to identify the key factors in the choice of children clothing. An exploratory ... more this article aims to identify the key factors in the choice of children clothing. An exploratory study was developed through a questionnaire answered by 313 children, between the ages of 6 and 11, from 4 different schools in Porto (Portugal), covering the private / state and the rural / urban dimensions. The Logit and Probit binary choice models have been chosen to evaluate the factors that influence children's choice (proxy), based on a hamper constituted by "Brand Name, Functionality and Fashion"). The conclusions show that these choices are positively related to Age, Sex, Environment, Parents' Income, Self-Esteem, Susceptibility to Interpersonal Influence and Utilitarian Value. On the contrary, Susceptibility to Reference Group Influence, Materialistic Attitudes, Ostentatious Value and Involvement are negatively related to choice.
... 3D braiding offers the advantages of high formability, superior mechanical behaviour, near-to... more ... 3D braiding offers the advantages of high formability, superior mechanical behaviour, near-to-shape accuracy and low production costs [2]. The weft-knitting technology is the most ... The tensile behaviour of weft-knitted fabrics is strongly influenced by their loop structure. ...
This work reports on research being carried out in the area of functional knitted fabrics with a ... more This work reports on research being carried out in the area of functional knitted fabrics with a special structure incorporating hydrophobic fibres near to the skin and suction channels of hydrophilic fibres to suck moisture from the skin on the hydrophilic layer away from the skin; in this way, comfort is maximised in active wear as the fabric does not feel wet near to the skin.
As the moisture content of a fabric increases, the relative water vapor permeability (the relativ... more As the moisture content of a fabric increases, the relative water vapor permeability (the relative heat flow responsible for the cooling of the body) also increases and the fabric temperature drops due to the evaporation of the water from the surface of the fabric. In this work on the experimental study of water vapor permeability of wet fabrics, the effect of air layers between the skin of the wearer and the fabric on the total relative cooling heat flow (cooling effect) experienced by the skin of the garment wearer is investigated. It was found out that when layers of 2- and 4-mm thickness were introduced between the skin and the fabric, the relative water vapor permeability or relative cooling heat flow was smaller than when the fabric was in direct contact with the skin, and in this case it did not depend significantly on the fabric moisture content.
... the influence of reference groups, the reference group influence: consumer susceptibility to... more ... the influence of reference groups, the reference group influence: consumer susceptibility to ... value, one may completely characterize the individual i's consumption behaviour, concerning the ... Artis, M., Suriñach, J. (2002), Econometric, Universitá Aberta de Catalunya, Barcelona, . ...
This article presents an experimental investigation carried out to understand the mechanical beha... more This article presents an experimental investigation carried out to understand the mechanical behavior of composite materials made of 3D stitched woven-knitted basalt fabrics. The innovative preforms used consist of two outer layers of a plain woven fabric combined with two inner layers of weft-knitted fabrics. The weft-knitted fabrics selected for the study were varied plain knit, 1 × 1 rib, Milano, and interlock. The fabric layers were stitched together with Kevlar yarns. These 3D stitched preforms were impregnated with polyester resin using resin transfer molding, and the corresponding composites obtained were tested under tensile, bending, and impact loads. The results obtained show that the type of knitted structure significantly influences the mechanical performance of the 3D stitched woven-knitted composites. The composite using interlock structure as the inner layers has the best results concerning energy absorption and tensile strength. The varied plain knit structure has pr...
Abstract This work reports on research being carried out in the area of functional knitted fabric... more Abstract This work reports on research being carried out in the area of functional knitted fabrics with a special structure incorporating hydrophobic fibres near to the skin and suction channels of hydrophilic fibres to suck moisture from the skin on the hydrophilic layer away ...
this article aims to identify the key factors in the choice of children clothing. An exploratory ... more this article aims to identify the key factors in the choice of children clothing. An exploratory study was developed through a questionnaire answered by 313 children, between the ages of 6 and 11, from 4 different schools in Porto (Portugal), covering the private / state and the rural / urban dimensions. The Logit and Probit binary choice models have been chosen to evaluate the factors that influence children's choice (proxy), based on a hamper constituted by "Brand Name, Functionality and Fashion"). The conclusions show that these choices are positively related to Age, Sex, Environment, Parents' Income, Self-Esteem, Susceptibility to Interpersonal Influence and Utilitarian Value. On the contrary, Susceptibility to Reference Group Influence, Materialistic Attitudes, Ostentatious Value and Involvement are negatively related to choice.
... 3D braiding offers the advantages of high formability, superior mechanical behaviour, near-to... more ... 3D braiding offers the advantages of high formability, superior mechanical behaviour, near-to-shape accuracy and low production costs [2]. The weft-knitting technology is the most ... The tensile behaviour of weft-knitted fabrics is strongly influenced by their loop structure. ...
This work reports on research being carried out in the area of functional knitted fabrics with a ... more This work reports on research being carried out in the area of functional knitted fabrics with a special structure incorporating hydrophobic fibres near to the skin and suction channels of hydrophilic fibres to suck moisture from the skin on the hydrophilic layer away from the skin; in this way, comfort is maximised in active wear as the fabric does not feel wet near to the skin.
As the moisture content of a fabric increases, the relative water vapor permeability (the relativ... more As the moisture content of a fabric increases, the relative water vapor permeability (the relative heat flow responsible for the cooling of the body) also increases and the fabric temperature drops due to the evaporation of the water from the surface of the fabric. In this work on the experimental study of water vapor permeability of wet fabrics, the effect of air layers between the skin of the wearer and the fabric on the total relative cooling heat flow (cooling effect) experienced by the skin of the garment wearer is investigated. It was found out that when layers of 2- and 4-mm thickness were introduced between the skin and the fabric, the relative water vapor permeability or relative cooling heat flow was smaller than when the fabric was in direct contact with the skin, and in this case it did not depend significantly on the fabric moisture content.
... the influence of reference groups, the reference group influence: consumer susceptibility to... more ... the influence of reference groups, the reference group influence: consumer susceptibility to ... value, one may completely characterize the individual i's consumption behaviour, concerning the ... Artis, M., Suriñach, J. (2002), Econometric, Universitá Aberta de Catalunya, Barcelona, . ...
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