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
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
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.
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
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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