ALLEGATO A: Verifiche strutturali del modulo gestione pedaliera

(1)

ALLEGATO A: Verifiche strutturali del modulo

gestione pedaliera

ANSYS Analysis By April 5, 2005

An ANSYS Analysis

Report Generated by ANSYS Mechanical Toolbar

Summary Model Information Analysis Information Results Information

(2)

Summary

This report documents a linear static analysis of the assembly struttura_ok_asm which was imported from the file F:/STUDIO/ansys prova/Struttura Pedaliera 2/struttura_ok_asm.igs and subjected to the load environment Environment 1 . The analysis was performed using the ANSYS 8.0 CAE software.

The assembly struttura_ok_asm was assigned properties of the material Aluminum and showed the following results:

Maximum total displacement is 1.28204E-02 mm Maximum equivalent stress is 5.1577 MPa

For details about the analysis, see Model Information, Analysis Information, and Results Information.

Model Information

The assembly struttura_ok_asm has a weight of 59.28 N ( 6.049 kg ) and was imported from F:/STUDIO/ansys prova/Struttura Pedaliera 2/struttura_ok_asm.igs . Figure 1 shows the model geometry and Figure 2 shows the finite element mesh. Table 1 lists the number of nodes and elements and Table 2 lists the properties of the material (Aluminum ) used in the model.

The model is an assembly consisting of 13 parts. Figure 3 shows the contact pairs and their corresponding behaviors are given in Table 3.

(3)

Figure 2. Finite Element Mesh

Table 1. Details of the Finite Element Model

Entity Number Defined Description

SOLID92 272325 10-Noded Tetrahedron

SURF154 308 Surface Element (for Force Transfer)

TARGE170 12710 Contact Target Segments

CONTA174 304 Contact Elements (Trave Piastra)

CONTA174 48 Contact Elements (Trave Guinto Piede)

CONTA174 48 Contact Elements (Trave Giunto Piede)

CONTA174 142 Contact Elements (Cerniera Piede)

CONTA174 436 Contact Elements (Trave Cerniera Montant

CONTA174 142 Contact Elements (Cerniera Montante)

CONTA174 49 Contact Elements (Angolare Base)

(4)

CONTA174 48 Contact Elements (Cerniera Trave Montant

CONTA174 51 Contact Elements (Angolare Montante)

CONTA174 272 Contact Elements (Base Montante)

CONTA174 48 Contact Elements (Cerniera Trave montant

CONTA174 51 Contact Elements (Angolare Montante)

CONTA174 49 Contact Elements (Angolare1 Base)

CONTA174 51 Contact Elements (Angolare1 Montante)

CONTA174 272 Contact Elements (Montante Base)

Nodes 523971

Table 2. Material Properties

Material Properties for Aluminum

Modulus of Elasticity [ MPa ] 7.3000E+04

Density [ kg/mm^3 ] 2.7700E-06

Poisson's Ratio 0.3300

Thermal Expansion Coefficient [ 1/degC ] 2.2700E-05

(5)

Table 3. Contact Pairs

Contact Pair Volumes Areas Behavior

Trave Piastra 9 12 363 467 Bonded

Trave Piastra 9 12 364 467 Bonded

Trave Guinto Piede 9 10 339 419 Bonded

Trave Giunto Piede 9 10 340 419 Bonded

Cerniera Piede 10 11 433 448 Bonded

Cerniera Piede 10 11 422 459 Bonded

Trave Cerniera Montante 8 9 309 334 Bonded

Cerniera Montante 3 8 222 323 Bonded

Cerniera Montante 3 8 233 312 Bonded

Angolare Base 1 6 29 283 Bonded

Angolare Base 1 6 30 283 Bonded

(6)

Angolare Montante 2 6 139 274 Bonded

Base Montante 1 2 30 134 Frictionless (No Separation)

Cerniera Trave montante 2 3 140 219 Bonded

Angolare Montante 2 6 140 274 Bonded

Angolare1 Base 1 7 30 299 Bonded

Angolare1 Montante 2 7 136 290 Bonded

Montante Base 1 2 31 134 Frictionless (No Separation)

(7)

Analysis Information

The assembly struttura_ok_asm was subjected to the load environment Environment 1 (see Figure 4 and Table 4) and evaluated with a linear static analysis.

Figure 4. Loads and Boundary Conditions

Table 4. Boundary Conditions for Environment: Environment 1

Constraints

Type Entity Direction Coordinate System

Constrained Translation Area 84 XYZ Global Cartesian

Constrained Translation Area 85 XYZ Global Cartesian

(8)

Loads

Values

(Global Cartesian Directions)

Type Entity X Y Z Applied to Entities

Force [ N ] Area 150.0 0.000 -90.00 470

Gravity [ mm/s^2 ] Volume 0.000 0.000 0.000 All

Angular Velocity [ RPM ] Volume 0.000 0.000 0.000 All

Uniform Temperature [ degC ] Volume 0.000 (Tref= 0.000 ) All

Results Information

The following figures and tables show the response of the assembly struttura_ok_asm to the load environment Environment 1 . The maximum total displacement is 1.28204E-02 mm and the maximum equivalent stress is 5.1577 MPa .

(9)

Figure 6. Equivalent Stress Contours

Table 5. Sum of the Reaction Forces

Total Reaction Force [ N ] X Y Z

-150.02 -4.35687E-06 90.009

Table 6. Moment About the Global Origin Due to the Reactions

Total Moment [ N mm ] X Y Z

(10)

Table 7. Forces Transmitted Between Parts in Global Cartesian

Forces [ N ] Contact Pair

X Y Z Trave Piastra 150.02 -3.51562E-06 -90.009

Trave Piastra 150.02 -3.51562E-06 -90.009

Trave Guinto Piede -112.16 0.11278 89.663

Trave Giunto Piede -112.16 0.11278 89.663

Cerniera Piede -55.858 0.93839 47.111

Cerniera Piede -56.300 -0.82560 42.553

Trave Cerniera Montante 37.857 0.11279 -0.34597

Cerniera Montante 19.365 0.81244 1.8870

Cerniera Montante 18.491 -0.69965 -2.2330

Angolare Base 12.179 0.41513 -40.131

Cerniera Trave Montante 37.857 0.11279 -0.34597

Angolare Montante -10.091 -0.38116 40.241

Base Montante 6.98400E-02 5.82898E-03 -3.3691

Cerniera Trave montante 37.857 0.11279 -0.34597

Angolare Montante -10.091 -0.38116 40.241 Angolare1 Base -1.8431 -2.6081 0.79407 Angolare1 Montante 1.8629 2.6728 -1.3205 Angolare2 Montante 2.1798 -2.6281 -0.99512 Angolare2 Base -2.1933 2.6566 0.52385 Angolare1 Base -1.8431 -2.6081 0.79407 Angolare1 Montante 1.8629 2.6728 -1.3205

(11)

Angolare3 Montante -30.625 0.25480 -43.022

Angolare3 Base 32.191 -0.21763 41.687

Table 8. Displacements

Displacements [ mm ]

X Y Z Vector Sum Maximum 1.26383E-02 1.28317E-03 -1.08671E-02 1.28204E-02

Table 9. Direct Stresses Direct Stresses [ MPa ]

X Y Z

Minimum -2.5252 -1.4360 -4.8598 Maximum 2.0185 1.5076 5.3196 Table 10. Shear Stresses

Shear Stresses [ MPa ]

XY YZ XZ

Minimum -0.71818 -1.0259 -2.1179 Maximum 0.72388 1.3021 1.1562