Iveco Stralis MY 2016, Body Builder Instructions

Page: 99 / 254

NEW STRALIS MY2016
‒
GUIDELINES FOR BODYBUILDERS
APPLICATIONS OF SUPERSTRUCTURES
3.3 CONNECTION BETWEEN CHASSIS AND SUBFRAME
13
–
Printed 692.68.697
–
5 Ed. - Base 03/2019
Subframe dimension
In case of elastic connection between chassis and subframe the bending moment M
f
must be subdivided proportionately between
chassis and subframe at the moments of inertia of the sections:
204635
Figure 9
M
f
= static bending moment generated by the superstructure [Nmm]
M
c
= part of the static bending moment M
f
applied to the subframe [Nmm]
M
t
= part of the static bending moment M
f
applied to the chassis [Nmm]
I
c
= moment of inertia of the section of the subframe [mm
4
]
I
t
= moment of inertia of the section of the chassis [mm 4 ]
σ
c
= maximum static stress applied to the subframe [N/mm
2
]
σ
t
= maximum static stress applied to the chassis [N/mm
2
]
W
c
= section modulus of the section of the subframe [mm
3
]
W
t
= section modulus 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)
Connection with brackets
Some examples of achievements of this type of connection, are shown in Figure 10.