Dimas Jose Smith - Academia.edu (original) (raw)
Papers by Dimas Jose Smith
Revista UIS Ingenierías, Jan 5, 2018
Un análisis multi-criterio ha sido desarrollado para evaluar la capacidad de absorción de energía... more Un análisis multi-criterio ha sido desarrollado para evaluar la capacidad de absorción de energía de tubos circulares fabricados con láminas de metal expandido y láminas sólidas. Mediante un Proceso de Jerarquía Analítica (AHP-Analytic Hierarchy Process) se asignaron como peso a diferentes parámetros de carga y resistencia de impacto. Posteriormente, estos pesos han sido luego atribuidos a una Evaluación Proporcional Compleja (COPRAS-Complex Proportional Assessment) para seleccionar la mejor opción entre seis alternativas disponibles. Los resultados muestran que los tubos circulares fabricados con láminas de metal expandido y celdas individuales con orientación α=0º presentan características favorables para absorber energía de forma controlada y estable, así como eficientes parámetros de diseño estructural. La metodología de análisis multi-criterio constituye una valiosa herramienta en los procesos de toma de decisiones para la selección de dispositivos empleados en aplicaciones de absorción de energía. PALABRAS CLAVE: Tubos circulares; láminas de metal expandido; proceso de jerarquía analítica; evaluación proporcional compleja; absorción de energía.
Thin-Walled Structures
Currently, in several engineering fields there is an increasing demand for lightweight structural... more Currently, in several engineering fields there is an increasing demand for lightweight structural components with high-strength and capable to dissipate energy, due to impact or seismic events, in a controlled manner. In this regard, expanded metal meshes have been successfully implemented in various applications, therefore this paper presents a review of manufacturing, applications, and structural performance of expanded metal meshes. At first, the production of expanded meshes is analyzed from a historical perspective and the material properties are discussed. Then, a review of patents is conducted covering a wide range of uses for expanded metal in various applications such as: manufacturing process of the mesh, art a decoration, electrical applications, acoustic control, aeronautical and space industry, railway industry, automotive industry, biomechanics, agriculture (farming), naval industry, ferrocement, flow control, support elements, filtration and separation, heat exchangers and cold machinery, flow control, machinery, impact protection, metal structures and foam reinforced with expanded metal. At the end, the structural performance of expanded metal meshes under various load conditions (compressive and tensile loadings, shear, bending and impact) is analyzed in depth. Finally, the results show that the structural responses, and corresponding strengths, of expanded metal meshes strongly depend on geometric parameters and the orientation of the cells. Increased cross-section properties and the use of high-strength material alloys are among the critical challenges for expanded metals.
Thin-Walled Structures, 2014
Previous studies have demonstrated that the failure mechanism and energy absorption capacity of e... more Previous studies have demonstrated that the failure mechanism and energy absorption capacity of expanded metal tubes strongly depends on the orientation of the cells. This paper presents an experimental investigation on the collapse of concentric expanded metal tubes subjected to quasistatic axial compression. Square tubes with two different cell orientations are tested to failure, and the energy absorption characteristics are calculated. The results show that the combination of cell geometries lead to a complex buckling mode interaction, which enhances the energy absorption capacity of expanded metal tubes.
Thin-Walled Structures, 2014
This paper presents an investigation on the structural behavior of flattened expanded metal tubes... more This paper presents an investigation on the structural behavior of flattened expanded metal tubes subjected to axial crushing. At first, the study is carried out experimentally to investigate the effect of the angle formed between the expanded metal cell and the applied load. Secondly, the results are compared with experimental results for standard expanded metal sheets. Thereafter, numerical analyses are conducted by means of nonlinear finite element models, to investigate the enhancement in the energy absorption characteristics due to flattening of the expanded metal. Both results, experimental and numerical show a significant increase in energy absorbing capacity and mean force for the flattened tubes.
Boletin Tecnico, Aug 1, 2009
Thin-Walled Structures, 2009
Expanded metal sheeting is widely used around the world for catwalks, granting, and decorative pu... more Expanded metal sheeting is widely used around the world for catwalks, granting, and decorative purposes. In the literature, little information can be found regarding the behavior of structural elements made of expanded metal. This paper is aimed at studying the axial collapse of squared and round tubes made of expanded metal sheeting under compressive loading. When expanding the metal a
BOLETÍN TÉCNICO IMME, 2009
Boletin Tecnico, Aug 1, 2009
Latin American Journal of Solids and Structures, Dec 1, 2016
This paper presents an experimental investigation on the axial crushing of coiled expanded metal ... more This paper presents an experimental investigation on the axial crushing of coiled expanded metal tubes subjected to quasi-static compressive loading. The investigation aims at comparing the energy absorption characteristics between tubes fabricated with coiled expanded metal meshes and solid plates. Then, a series of quasistatic axial crushing tests were performed to obtain the structural performance on coiled tubes, and then compare these with round and square solid tubes. Coiled tubes were fabricated using circular and square geometries, as well as various cell orientations. The results showed that cell orientation enhance the energy absorption response of the coiled tubes. Regarding these responses in comparison to those of solid tubes, the results showed that for coiled and solid tubes with the same weight, the energy absorption capacity of the former is much lesser than the latter.
Recent Patents on Materials Sciencee, 2009
Expanded metal has been widely used around the world. This paper is aimed at presenting latest ad... more Expanded metal has been widely used around the world. This paper is aimed at presenting latest advances in the use of expanded metal in engineering. Currently, expanded metal is mainly used in the construction industry as furniture, fences or protection purposes. Hundreds of patents can be found in the literature regarding possible applications for expanded metal. These applications fall into four main areas: furniture, construction, biomechanics, and energy absorption systems. When expanding the metal, the material undergoes slits and stretching modifying the mechanical properties of the base metal, hence enhancing the material strength. Additionally, there is a reduction of the weight per unit of area, which is an asset when designing lightweight structures. Waste material from the manufacturing process is almost none, since the base metal is cut and stretched to the final form. Recently, expanded metal sheets are used in architecture to create modern, efficient and elegant buildings that are also energy-efficient, open and transparent. The relevant patents on expanded metals are discussed.
Recent Patents on Materials Science, 2010
Expanded metal has been widely used around the world. This paper is aimed at presenting latest ad... more Expanded metal has been widely used around the world. This paper is aimed at presenting latest advances in the use of expanded metal in engineering. Currently, expanded metal is mainly used in the construction industry as furniture, fences or protection purposes. Hundreds of patents can be found in the literature regarding possible applications for expanded metal. These applications fall into four main areas: furniture, construction, biomechanics, and energy absorption systems. When expanding the metal, the material undergoes slits and stretching modifying the mechanical properties of the base metal, hence enhancing the material strength. Additionally, there is a reduction of the weight per unit of area, which is an asset when designing lightweight structures. Waste material from the manufacturing process is almost none, since the base metal is cut and stretched to the final form. Recently, expanded metal sheets are used in architecture to create modern, efficient and elegant buildings that are also energy-efficient, open and transparent. The relevant patents on expanded metals are discussed.
Revista UIS Ingenierías, Jan 5, 2018
Un análisis multi-criterio ha sido desarrollado para evaluar la capacidad de absorción de energía... more Un análisis multi-criterio ha sido desarrollado para evaluar la capacidad de absorción de energía de tubos circulares fabricados con láminas de metal expandido y láminas sólidas. Mediante un Proceso de Jerarquía Analítica (AHP-Analytic Hierarchy Process) se asignaron como peso a diferentes parámetros de carga y resistencia de impacto. Posteriormente, estos pesos han sido luego atribuidos a una Evaluación Proporcional Compleja (COPRAS-Complex Proportional Assessment) para seleccionar la mejor opción entre seis alternativas disponibles. Los resultados muestran que los tubos circulares fabricados con láminas de metal expandido y celdas individuales con orientación α=0º presentan características favorables para absorber energía de forma controlada y estable, así como eficientes parámetros de diseño estructural. La metodología de análisis multi-criterio constituye una valiosa herramienta en los procesos de toma de decisiones para la selección de dispositivos empleados en aplicaciones de absorción de energía. PALABRAS CLAVE: Tubos circulares; láminas de metal expandido; proceso de jerarquía analítica; evaluación proporcional compleja; absorción de energía.
Thin-Walled Structures
Currently, in several engineering fields there is an increasing demand for lightweight structural... more Currently, in several engineering fields there is an increasing demand for lightweight structural components with high-strength and capable to dissipate energy, due to impact or seismic events, in a controlled manner. In this regard, expanded metal meshes have been successfully implemented in various applications, therefore this paper presents a review of manufacturing, applications, and structural performance of expanded metal meshes. At first, the production of expanded meshes is analyzed from a historical perspective and the material properties are discussed. Then, a review of patents is conducted covering a wide range of uses for expanded metal in various applications such as: manufacturing process of the mesh, art a decoration, electrical applications, acoustic control, aeronautical and space industry, railway industry, automotive industry, biomechanics, agriculture (farming), naval industry, ferrocement, flow control, support elements, filtration and separation, heat exchangers and cold machinery, flow control, machinery, impact protection, metal structures and foam reinforced with expanded metal. At the end, the structural performance of expanded metal meshes under various load conditions (compressive and tensile loadings, shear, bending and impact) is analyzed in depth. Finally, the results show that the structural responses, and corresponding strengths, of expanded metal meshes strongly depend on geometric parameters and the orientation of the cells. Increased cross-section properties and the use of high-strength material alloys are among the critical challenges for expanded metals.
Thin-Walled Structures, 2014
Previous studies have demonstrated that the failure mechanism and energy absorption capacity of e... more Previous studies have demonstrated that the failure mechanism and energy absorption capacity of expanded metal tubes strongly depends on the orientation of the cells. This paper presents an experimental investigation on the collapse of concentric expanded metal tubes subjected to quasistatic axial compression. Square tubes with two different cell orientations are tested to failure, and the energy absorption characteristics are calculated. The results show that the combination of cell geometries lead to a complex buckling mode interaction, which enhances the energy absorption capacity of expanded metal tubes.
Thin-Walled Structures, 2014
This paper presents an investigation on the structural behavior of flattened expanded metal tubes... more This paper presents an investigation on the structural behavior of flattened expanded metal tubes subjected to axial crushing. At first, the study is carried out experimentally to investigate the effect of the angle formed between the expanded metal cell and the applied load. Secondly, the results are compared with experimental results for standard expanded metal sheets. Thereafter, numerical analyses are conducted by means of nonlinear finite element models, to investigate the enhancement in the energy absorption characteristics due to flattening of the expanded metal. Both results, experimental and numerical show a significant increase in energy absorbing capacity and mean force for the flattened tubes.
Boletin Tecnico, Aug 1, 2009
Thin-Walled Structures, 2009
Expanded metal sheeting is widely used around the world for catwalks, granting, and decorative pu... more Expanded metal sheeting is widely used around the world for catwalks, granting, and decorative purposes. In the literature, little information can be found regarding the behavior of structural elements made of expanded metal. This paper is aimed at studying the axial collapse of squared and round tubes made of expanded metal sheeting under compressive loading. When expanding the metal a
BOLETÍN TÉCNICO IMME, 2009
Boletin Tecnico, Aug 1, 2009
Latin American Journal of Solids and Structures, Dec 1, 2016
This paper presents an experimental investigation on the axial crushing of coiled expanded metal ... more This paper presents an experimental investigation on the axial crushing of coiled expanded metal tubes subjected to quasi-static compressive loading. The investigation aims at comparing the energy absorption characteristics between tubes fabricated with coiled expanded metal meshes and solid plates. Then, a series of quasistatic axial crushing tests were performed to obtain the structural performance on coiled tubes, and then compare these with round and square solid tubes. Coiled tubes were fabricated using circular and square geometries, as well as various cell orientations. The results showed that cell orientation enhance the energy absorption response of the coiled tubes. Regarding these responses in comparison to those of solid tubes, the results showed that for coiled and solid tubes with the same weight, the energy absorption capacity of the former is much lesser than the latter.
Recent Patents on Materials Sciencee, 2009
Expanded metal has been widely used around the world. This paper is aimed at presenting latest ad... more Expanded metal has been widely used around the world. This paper is aimed at presenting latest advances in the use of expanded metal in engineering. Currently, expanded metal is mainly used in the construction industry as furniture, fences or protection purposes. Hundreds of patents can be found in the literature regarding possible applications for expanded metal. These applications fall into four main areas: furniture, construction, biomechanics, and energy absorption systems. When expanding the metal, the material undergoes slits and stretching modifying the mechanical properties of the base metal, hence enhancing the material strength. Additionally, there is a reduction of the weight per unit of area, which is an asset when designing lightweight structures. Waste material from the manufacturing process is almost none, since the base metal is cut and stretched to the final form. Recently, expanded metal sheets are used in architecture to create modern, efficient and elegant buildings that are also energy-efficient, open and transparent. The relevant patents on expanded metals are discussed.
Recent Patents on Materials Science, 2010
Expanded metal has been widely used around the world. This paper is aimed at presenting latest ad... more Expanded metal has been widely used around the world. This paper is aimed at presenting latest advances in the use of expanded metal in engineering. Currently, expanded metal is mainly used in the construction industry as furniture, fences or protection purposes. Hundreds of patents can be found in the literature regarding possible applications for expanded metal. These applications fall into four main areas: furniture, construction, biomechanics, and energy absorption systems. When expanding the metal, the material undergoes slits and stretching modifying the mechanical properties of the base metal, hence enhancing the material strength. Additionally, there is a reduction of the weight per unit of area, which is an asset when designing lightweight structures. Waste material from the manufacturing process is almost none, since the base metal is cut and stretched to the final form. Recently, expanded metal sheets are used in architecture to create modern, efficient and elegant buildings that are also energy-efficient, open and transparent. The relevant patents on expanded metals are discussed.