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The figure shown below (Fig. 2) is a schematic representation of a scissor jack in two different positions. The maximum load that this mechanism must withstand is 800 kg. 4 are proposed different materials to make the jack arms and spindle. The mechanical properties and some Physical characteristics of each material are shown in Table 1. a) Based on the properties of each material and the cross section of the arms and the screw, Propose what would be the most suitable material for its manufacture. The length of each arm is 150 mm. The stress on the arms and the spindle must not exceed the yield strength of the material selected for neither of the two analysis positions. b) Using the mechanical properties of the material you selected, calculate the change in dimension that the arms and the spindle of the jack were tested for the two analysis positions. The length of the spindle is 280 mm.

The figure shown below (Fig. 2) is a schematic representation of a scissor jack in two different positions. The maximum load that this mechanism must withstand is 800 kg. 4 are proposed different materials to make the jack arms and spindle. The mechanical properties and some Physical characteristics of each material are shown in Table 1. a) Based on the properties of each material and the cross section of the arms and the screw, Propose what would be the most suitable material for its manufacture. The length of each arm is 150 mm. The stress on the arms and the spindle must not exceed the yield strength of the material selected for neither of the two analysis positions. b) Using the mechanical properties of the material you selected, calculate the change in dimension that the arms and the spindle of the jack were tested for the two analysis positions. The length of the spindle is 280 mm.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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The figure shown below (Fig. 2) is a schematic representation of a scissor jack in two different positions. The maximum load that this mechanism must withstand is 800 kg. 4 are proposed different materials to make the jack arms and spindle. The mechanical properties and some Physical characteristics of each material are shown in Table 1.

a) Based on the properties of each material and the cross section of the arms and the screw, Propose what would be the most suitable material for its manufacture. The length of each arm is 150 mm. The stress on the arms and the spindle must not exceed the yield strength of the material selected for neither of the two analysis positions.

b) Using the mechanical properties of the material you selected, calculate the change in dimension that the arms and the spindle of the jack were tested for the two analysis positions. The length of the spindle is 280 mm.

a) b) c) 20 mm 800 Kg 1 mm 800 Kg 1 mm Sección transversal de los brazos 3/8 in Diametro nominal Figura 2.- Representación esquemática del gato de tijera; a) Posición a; Posición b; Sección transversal de los brazos y el husillo. 205 mm 125 mm 15 тm
Transcribed Image Text:a) b) c) 20 mm 800 Kg 1 mm 800 Kg 1 mm Sección transversal de los brazos 3/8 in Diametro nominal Figura 2.- Representación esquemática del gato de tijera; a) Posición a; Posición b; Sección transversal de los brazos y el husillo. 205 mm 125 mm 15 тm
Tabla 1.- Propiedades mecánicas de los materiales propuestos. Aleación de Fundición de Acero de Acero Material Aluminio hierro bajo carbono inoxidable Módulo de Young (GPa) 80 200 210 205 Esfuerzo de Cedencia (MPa) 220 180 330 420 Densidad (gr/cm^3) 2.7 7.2 7.85 7.93 Maquinabilidad Alta Alta Alta Media Ductilidad Alta Nula Media Baja Resistencia a la corrosión Alta Media Baja Alta Resistencia al desgaste Baja Media Media Alta Costo (S/Kg) 250 60 100 350
Transcribed Image Text:Tabla 1.- Propiedades mecánicas de los materiales propuestos. Aleación de Fundición de Acero de Acero Material Aluminio hierro bajo carbono inoxidable Módulo de Young (GPa) 80 200 210 205 Esfuerzo de Cedencia (MPa) 220 180 330 420 Densidad (gr/cm^3) 2.7 7.2 7.85 7.93 Maquinabilidad Alta Alta Alta Media Ductilidad Alta Nula Media Baja Resistencia a la corrosión Alta Media Baja Alta Resistencia al desgaste Baja Media Media Alta Costo (S/Kg) 250 60 100 350
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