• Aucun résultat trouvé

Machine Elements

N/A
N/A
Protected

Academic year: 2022

Partager "Machine Elements"

Copied!
1
0
0

Texte intégral

(1)

IBMMAE – 3- Machine Elements

1

Static & Fatigue loading

Forces, stress, resistance criteria

Figure 1 Tableau 1

One considers the cylindrical bar represented in figure 1. It is clamped in O. The bar and the arm are rigidly coupled.

A force F is applied in C.

Static loading

a. Define and determine the stress state at points A and B.

b. With the values indicated in table 1 and F=Fmax, check the static resistance of the bar and determine the safety factor

c. In the case of a hollow cylindrical bar, which maximum inner diameter could be used (here, the shear stress due to the shear load will be neglected) ?

Fluctuating load, fatigue

a. The load F is assumed to be varied sinusoïdally between Fmin et Fmax. Determine the mean and amplitude stress in A and B

b. Determine the fatigue safety factor using the Soderberg or/and Goodmann criteria.

d

40 mm

l 300 mm

a 200 mm

Fmin -1000 N Fmax 1500 N σE,Y 325 MPa σr,u 450 MPa

σD 160 MPa

bar

arm

Références

Documents relatifs

L’accès aux archives de la revue « Rendiconti del Seminario Matematico della Università di Padova » ( http://rendiconti.math.unipd.it/ ) implique l’accord avec les

Objective of this study was to assess the correlation of the WHO definition with the presence of drug-resistance mutations in patients who present with 2 consecutive unsuppressed VL

His electronic medical record tracks indicators of government-identified pay-for-performance benchmarks, but its usefulness in patient care is hampered by a lack of

In order to evaluate the validity of the RC model, the numerically obtained load bearing capacities for a restrained solid slab slice are compared with the results from

• SIMAN provides a single interface for the site administra- tor to define users' quota limits, Terminal Security System (TSS) data, and system security data. TSS permits each

The adjective expression “ opened cyst ” , its acronym “OC”, and its definition, to qualify more precisely the total cystectomy, were accepted by a majority of voters (median:

It may, however, be worth pointing out that in case the operation of modulation leaves the core meaning unaltered, the possibilities of the "conditional interpretation"

 Third generation, from now on: Services evolution and global convergence.  Network and