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DEBRE BERHAN UNIVERSITY CALLAGE OF ENGINEERING DEPARTMENT OF MECHANICAL ENGINEERING
FEM ANALYSIS GROUP ASSIGNMENT TITLE:
ANALYSIS OF SCISSOR JACK
1, INTROUDUCTION Scissor jacks are simple mechanisms used to drive large loads over short distances in to translator motion. Most scissor jacks are similar in design. Consisting of four main memes driven by a power screw. The power screw of scissor jacks greatly reduce the amount of force required by the user to drive the mechanism. This report is about fem analysis of already designed scissor jack with a software called ANSYS. This jack is designed designed for heavy duty duty vehicles and and design load is taken 50,000 N. N.
Supporting frame
rivets Upper and lower links
1, INTROUDUCTION Scissor jacks are simple mechanisms used to drive large loads over short distances in to translator motion. Most scissor jacks are similar in design. Consisting of four main memes driven by a power screw. The power screw of scissor jacks greatly reduce the amount of force required by the user to drive the mechanism. This report is about fem analysis of already designed scissor jack with a software called ANSYS. This jack is designed designed for heavy duty duty vehicles and and design load is taken 50,000 N. N.
Supporting frame
rivets Upper and lower links
2, MATERIAL PROPERTIES Structural steel is the material used for all components of the scissor jack. The following table briefly elaborates properties of this material. Those properties are taken at a reference temperature of 22 degrees Celsius.
Density
7.85e-006 kg/ mm 3
Specific Heat
4.34e+005 mJ / kg C
Compressive Yield Strength MPa
200
Tensile Yield Strength MPa
250
Tensile Ultimate Strength MPa
460
Young's Modulus MPa
2.e+005
Poisson's Ratio
0.3
Shear Modulus MPa
76923
3, ANALYSIS OF MAIN PARTS OF SCISSOR JACK 2.1 ANALYSIS OF SUPPORTING FRAME Volume: 94629 mm³ Mass: 0.74284 kg
2.1 ANALYSIS OF BASE Volume: 2.2164e+005 mm³ Mass: 1.7399 kg
2.1 ANALYSIS OF TWO LINKS Volume: 1.7017e+005 mm³ Mass: 1.3358 kg
4, ANALYSIS OF SCISSOR JACK ASSEMBLY Volume: 1.0895e+006 mm³ Mass: sa
