## Transcribed Text

Simulation Software Perform stress analysis of pistor (seethe attached SolidWorks file)
using the following data:
Material
RSP Technology Aluminum RSA-447 Piston Alloy
http://www matweb.com/
Density
2750 kg/m^3
Thermalconductivity
130 W/m-K
Specific heat
1000 J/(kg.K
Thermalexpansion
1.8e-5 m/K
coefficient
Modulus elasticity
97 GPa
Poisson's ratio
0.33
Shear modulus
36.46 GPa
Tensile strength
530 MPa
Yield strength
425 MPa
Loads
Pressure on the top part of the piston 1.0 MPa
1
Restraints
1 The piston's motion is restrained in vertical
irection on the upper portion of the pin hole as
itis shown in the picture on theright.
2 The piston's motion is restrained radial and
tircumferential directions on the cylindrical
surface as shown in the picture onthe right
1. Stress analysis without thermal load (use mesh size of 2mm)
Perform stress analysis inthe piston using the material and loads men tioned above
Plot distributions of:
.
x,y, components ofthe displacement vector;
Resultant displacement;
Von Mises and : 1st principal stresses;
Factor of safety.
Annotate positions of the max values ofthe displacement, von Mises and 1" principal stresses.
Answer the following questions:
1. What the value of the safety factor?
2. Can the piston withstand the applied load?
3. What needs to be done to ensure that simulation results are correct?
2
2. Stress analysis with thermal load (use mesh size of 2mm)
Perform thermal stress analysis in the piston using tempera ature distribution obtained in HW#3 and the
material and mechanic: loads mentioned above Assume that the reference (strain free) temper ature
of the piston was 20°C.
Plot distributions of:
x,y, zomponents of the displacement vector;
Resultant displacement;
Von Mises and 1st principal stresses;
Factor safety.
Annotate positions of the max values ofthe displacement, von Mises and: 1" principal stresses.
Answer the following questions:
1. Whati the value of the safety factor?
2. Can the piston withstand the applied load?
Bonus question:
Does the mathematical formulation of the restraint #1 (onthe upper portion of the pin hole)
adequately describe the real-world situation? If not, what could be better choice for restraint
#1?

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