ESDU 67014+Amendment(A)-1974 内压作用下厚壁圆筒的疲劳强度

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1
67014
FATIGUE STRENGTH OF THICK CYLINDERS UNDER INTERNAL PRESSURE
1. NOTATION
Both SI and British units are quoted but any coherent system of units may be used.
2. NOTES
The results of about 110 fatigue tests on steel cylinders and 60 fatigue tests on aluminium alloy cylinders
have been analysed to give curves of /ft against N.
The cylinders were pressurised with oil and supported the axial pressure loads by tension in the walls. The
minimum pressure in the load cycle was effectively zero. The bores were given a good honed finish, the
steel cylinders to less than 4 micro-inches (centre line average) and the aluminium cylinders to between 6
and 13 micro-inches (average roughness height). Failure was judged to have occurred when oil from the
interior started to leak through the walls.
The materials from which the cylinders were made are listed in Table 2.1.
The steel cylinders covered a range of D/d from 1.2 to 3.0 and bore diameters from 0.375 to 1.0 in. The
aluminium alloy cylinders were all of D/d equal to 1.1, with a bore diameter of 2.0 in.
bore diameter of cylinder m in
outside diameter of cylinder m in
tensile strength of material N/m2lbf/in2
endurance
maximum applied internal pressure N/m2lbf/in2
maximum elastic shear stress at bore, N/m2lbf/in2
TABLE 2.1
Material Specification
ft
lbf/in2MN/m2
Steel
Aluminium
Alloy
En 25
En 25
En 56
S 106
DTD 364B
DTD 683
126 000
149 000
102 000
121 000
75 000
78 000
870
1030
700
830
520
540
d
D
f
t
N
p
qmax
p
D
2
D
2
d
2
–
--------------------



qmax
Issued February 1967
With Amendment A, September 1974
ESDU product release: 2006-01. For current status, contact ESDU. Observe Copyright.
北极星标准文库-高清标准规范分享平台 www.bjxwk.com
2
67014
In Figure 1 the two scatter bands include 90 per cent of the results from each group of alloys; these bands
have been drawn so that 5 per cent of the results lie above the band and 5 per cent lie below.
For the results shown, the maximum shear stresses at the bore do not exceed half the tensile 0.1 per cent
proof stresses of the materials. The maximum bore shear stress was chosen in preference to the maximum
hoop stress because it provides the best correlation of data from a wide range of D/d ratios.
The limited experimental data indicate that a small cross-bore (radial hole) through the cylinder wall reduces
the fatigue strength of a cylinder of the type considered here by about 1/2.
It may be noted that the value of qmax for steel cylinders with endurances exceeding 107 cycles approximates
to the fatigue limit for steels under repeated tension loading as given in Item No. 88008 “Fatigue limit of
unnotched steels (related to tensile strength)”. For the particular case of the cylinders considered here,
failure criteria based on maximum shear stress and maximum shear strain energy (Mises-Hencky) are nearly
equivalent.
3. DERIVATION
1. HOARE, R.G.
STOTT, H. Investigation into the life of aluminium alloy cylinders under repeated
application of internal hydraulic pressure. Ministry of Aviation, S. and T.
Memo. No. 16/58, 1958.
2. MORRISON, J.L.M.
CROSSLAND, B.
PARRY, J.S.C.
Fatigue strength of cylinders with cross-bores. J. mech. Engng Sci., Vol. 1,
No. 3, pp. 207-210, 1959.
3. MORRISON, J.L.M.
CROSSLAND, B.
PARRY, J.S.C.
Strength of thick cylinders subjected to repeated internal pressure. Proc.
Instn mech. Engrs, Vol. 174, No. 2, pp. 95-108, 1960.
4. PARRY, J.S.C. Fatigue of thick cylinders: further practical information. Proc. Instn mech.
Engrs, Vol. 180, Part 1, No. 16, pp. 387-416, 1966.
ESDU product release: 2006-01. For current status, contact ESDU. Observe Copyright.
北极星标准文库-高清标准规范分享平台 www.bjxwk.com
3
67014
FIGURE 1
N
23456789 23456789 23456789 23456789
103104105106107
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.15
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
0.10
ooo
o
ooo
ooo
oooo
x
xx
x
xx
xxx
x
x
2
2
2
2
2
2
2
2
2E
24
3
2
2
2
Steels
B
Aluminium Alloys
Numbers of coincident results are quoted
against points where they occur
%
&
+
▲
Symbol
En 25 (126 000 lbf/in2)
En 25 (149 000 lbf/in2)
En 56
S 106
DTD 364 B
DTD 683
Unbroken specimen
Material
qmax
ft
ESDU product release: 2006-01. For current status, contact ESDU. Observe Copyright.
北极星标准文库-高清标准规范分享平台 www.bjxwk.com

标签： #疲劳强度

摘要：

本规范文档 ESDU 67014+Amendment(A)-1974 详细阐述了在内部压力作用下厚壁圆筒的疲劳强度评估方法，适用于工程设计与结构完整性分析。该标准由ESDU（Engineering Sciences Data Unit）发布，是机械、压力容器及航空航天领域重要的技术参考，尤其针对承受循环内压载荷的厚壁圆筒构件。文档内容涵盖疲劳失效机理、应力分布计算、材料疲劳特性及安全系数选取原则，并包含与应力集中、表面处理及环境影响相关的修正建议。其修订版Amendment(A)进一步更新了数据

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作者：小气猫 分类：国外协会 价格：18星币 属性：5 页 大小：159.83KB 格式：PDF 时间：2026-03-23

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