ESDU STRUCT 01.01.08
Local instability of struts with flat sides.
Abstract:
ESDU Struct 01.01.08 provides a graph from which the stress for initial local buckling of the web or flange of closed or open section struts can be obtained. Plasticity is taken into account by representing the stressstrain curve of the material by the expressions given in ESDU 76016, which require a material characteristic, m, and the stress, f_{n}, at which the tangent modulus is half the elastic modulus of the material in compression. The graph plots the ratio of the buckling stress to f_{n} for various values of m against a parameter involving the buckling stress coefficient, the width of the appropriate side and the modulus of elasticity of the material. The buckling stress coefficient is defined as the square of the width to thickness ratio of the appropriate side factored by the ratio of the critical stress to the tangent modulus of the material. Superimposed on those curves are two sets of lines plotting the root of the ratio of f_{n} to the modulus of elasticity, one for constant thickness to width ratio of the web and a similar set for the flange. That auxiliary set of lines allows a rapid evaluation of the abscissa from which the buckling stress is readily obtained. The curves apply to struts whose length exceeds four times the larger width of the section. For open sections it is assumed the lip will prevent the web buckling sideways. Generally there will be an interaction between different modes of buckling and ESDU 76023 and ESDU 77030 treat such effects. However, where a local mode is known to predominate, the method gives good estimates of the buckling stress. A worked example illustrates the use of the curves. For a panel with Zsection stiffeners, ESDU 71014 treats local buckling including the influence of the plate. ESDU 90002 introduces a computer program that treats flexural and local modes of buckling and interrivet buckling.Indexed under:
 None
Details:
Data Item ESDU STRUCT 01.01.08  

Format: 

Status: 

Previous Releases: 

ISBN: 

The Data Item document you have requested is available only to subscribers or purchasers.
 Subscribers login here.
 If you are not an ESDU subscriber you can
 find out how to subscribe, or
 purchase this Data Item from the IHS Standards Store.
Explore ESDU
ESDU Series:
 Aerodynamics
 Aircraft Noise
 Composites
 Dynamics
 Fatigue  Endurance Data
 Fatigue  Fracture Mechanics
 Fluid Mechanics, Internal Flow
 Fluid Mechanics, Internal Flow (Aerospace)
 Heat Transfer
 Mechanisms
 Performance
 Physical Data, Chemical Engineering
 Stress and Strength
 Structures
 Transonic Aerodynamics
 Tribology
 Vibration and Acoustic Fatigue
 Wind Engineering
ESDU Packages:
 Home  AZ index  Contact Us  Help  About Us  Terms of Use  Privacy Policy  How we use cookies  How to Subscribe 
© 19992019 IHS ESDU, part of IHS Inc.