Analytical Strength Assessment Edition

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280,00 EUR
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FKM 2013
Preis: Euro 280,00
VDMA-Mitglieder: Euro 140,-
232 pages
ISBN: 978-3-8163-0649-8 = english language version of Rechnerischer Festigkeitsnachweis, 6th edition 2012


0 General survey
0.0 Scope
0.1 Technical Background
0.2 Required assessments
0.3 Stresses and component types
0.4 Procedure of calculation
1 Assessment of the static strength using nominal stresses
1.0 General
1.1 Characteristic service stresses
1.2 Material properties
1.3 Design parameters
1.4 Component strength
1.5 Safety factors
1.6 Assessment
2 Assessment of the fatigue strength using nominal stresses
2.0 General
2.1 Characteristic service stresses
2.2 Material properties
2.3 Design parameters
2.4 Component strength
2.5 Safety factors
2.6 Assessment
3 Assessment of the static strength using local stresses
3.0 General
3.1 Characteristic service stresses
3.2 Material properties
3.3 Design parameters
3.4 Component strength
3.5 Safety factors
3.6 Assessment
4 Assessment of the fatigue strength using local stresses
4.0 General
4.1 Characteristic service stresses
4.2 Material properties
4.3 Design parameters
4.4 Component strength
4.5 Safety factors
4.6 Assessment
5 Annexes
5.1 Material tables
5.2 Stress concentration factors
5.3 Fatigue notch factors
5.4 Fatigue classes for welded components made of structural steel and of aluminum alloys
5.5 Estimation of the fatigue limit of surface treated components
5.6 Experimental determination of component strength values
5.7 Design loads
6 Examples
6.1 Shaft shoulder
6.2 Cast component
6.3 Compressor flange made of grey cast iron
6.4 Welded perforated rod
6.5 Welded T-section made of aluminum
6.6 Welded aluminum structure
7 Symbols
7.1 Abbreviations
7.2 Indexes
7.3 Lower case characters
7.4 Upper case characters
7.5 Greek alphabetic characters
7.6 Basic equations
8 Modifications
8.1 General

This sixth revised edition of the FKM Guideline now
takes into consideration more recent research results, particularly
those of the research projects """"Assessment of the
static strength"""" and """"Improved calculation concept for the
FKM Guideline"""".
The chapters on standard spectra, on classes of utilization
as well as on an improved method for computing the component
fatigue limit in the case of synchronous multiaxial
stresses have been deleted to make the FKM Guideline
more clear. Using these methods in accordance with the
fifth edition of the FKM Guideline, however, is still permissible.
For the sixth edition of the FKM Guideline, all chapters
have been completely revised. The main modifications are
as follows:
lifting of the strict formal uniformity of the different
assessment procedures, provided this results in better
– clear allocation between characteristic service stresses
and component designs: nominal stresses for rodshaped
components with section size-related stress
types, local stresses for all components based on the
stress components;
– new safety level "mean consequences of failure";
– complete revision of the assessment of the static
strength for welded components with separate material
tables and taking into consideration of the softening of
aluminum in accordance with DIN 4113;
– in the assessment of the static strength, relating the
strength values to the yield strength and omission of a
summarized design factor;
– conversion of the assessment of the static strength
using local stresses to an assessment using equivalent
stresses, degree of multiaxiality and rewording of the
critical strain;
– inclusion of the assessment of the static strength for
welded components using the R1 concept, based on the
critical strains for structural steels;
– complete revision of the assessment of the fatigue
strength for welded components, including an adaptation
of FAT classes and safety factors to the current
IIW recommendations as well as rewording regarding
the thickness factor and the estimation of residual
– integration of a new material-mechanical concept of
support effects;
– clear wording in the Haigh diagram for shear stresses;
– new wording for the differentiation between component
variable amplitude fatigue strength and yield strength;
– improved method of the consistent version of Miner’s
rule for model II constant amplitude S-N curves;
– new wording for the effective damage sum;
– new comparative hypothesis for non-proportional
stresses acting on rod-shaped components;
– complete revision of the material tables;
– new Chapter 5.5 on the estimation of the fatigue limit
of surface treated components;
– new Chapter 5.7 giving advice on design loads.
Ongoing as well as future research projects will contribute
to the further improvement of the guideline.

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