EUROCARGO Euro 6
–
APPLICATIONS OF SUPERSTRUCTURES
APPLICATIONS OF SUPERSTRUCTURES
3.3
CONNECTION BETWEEN CHASSIS AND COUNTER CHASSIS
13
–
Printed 603.95.747
–
1st Ed. - Base 12/2013
σ
c
= maximum static stress applied to the counter-chassis [N/mm
2
]
σ
t
= maximum static stress applied to the chassis [N/mm
2
]
W
c
= resistance module of the section of the counter-chassis [mm
3
]
W
t
= resistance module of the section of the chassis [mm
3
]
σ
amm
= maximum static stress allowed on chassis [N/mm
2
] see chapter 2.1, Paragraph "Stresses on the chassis" (
➠
Page 7)
Example of stress calculation in case of elastic connection with the chassis
We consider two C sections with the following dimensions:
chassis: 250 x 70 x 5 mm
counter chassis: 140 x 70 x 7 mm
and stressed in a section given by the maximum bending moment M
f
equal to 15.000 Nm, perpendicular applied to the plane con-
taining the rib of the side member.
From the calculation are obtained the following values:
chassis
I
t
= 1.545 cm
4
W
t
= 123 cm
3
counter chassis I
c
= 522 cm
4
W
c
= 74 cm
3
Applying the formulas will be obtained:
M
t
= M
f
x [I
t
/ (I
c
+ I
t
)] = 8.500 x [588 / (588 + 183)] = 11.200 Nm
M
c
= M
f
x [I
c
/ (I
c
+ I
t
)] = 8.500 x [183 / (588 + 183)] = 3.790 Nm
and then:
σ
t
= M
t
/ W
t
= 91 N/mm
2
σ
c
= M
c
/ W
c
= 51 N/mm
2
Connection with brackets
Some examples of achievements of this type of connection, are shown in Figure 3.9.
Содержание EUROCARGO
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Страница 9: ... Printed 603 95 747 Base 12 2013 SECTION 1 GENERAL INFORMATION ...
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Страница 29: ... Printed 603 95 747 Base 12 2013 SECTION 2 CHASSIS INTERVENTIONS ...
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Страница 91: ... Printed 603 95 747 Base 12 2013 SECTION 3 APPLICATIONS OF SUPERSTRUCTURES ...
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Страница 161: ... Printed 603 95 747 Base 12 2013 SECTION 5 ELECTRONIC SUB SYSTEMS ...
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Страница 215: ... Printed 603 95 747 Base 12 2013 SECTION 6 SPECIAL INSTRUCTIONS FOR SCR EXHAUST SYSTEM ...
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