Non-linear idealisation error analysis of an aerospace stiffened panel loaded in compression

The SAFE Structural Analysis procedure is an idealisation error control methodology devised for linear static finite element analysis. This study examines the applicability of this process to non-linear problems. The studied case is the collapse analysis of an aircraft stiffened panel loaded in compression. This article presents the critical investigation of important modelling assumptions, including the joint modelling, boundary conditions, geometrical imperfections and scattering in material parameters. Potential error sources are identified and then analysed using the non-linear finite element solver ABAQUS. The analysis derived an improved finite element model and concrete idealisation error estimates. The finally simulated failure behaviour corresponds well to the data measured in the test.

[1]  J. A. Witz,et al.  A parametric study of the post-buckling behaviour of steel plates , 2001 .

[2]  Edward B. Haugen,et al.  Probabilistic Mechanical Design , 1980 .

[3]  Mark Price,et al.  The Computational Post Buckling Analysis Of Fuselage Stiffened Panels Loaded In Compression , 2004 .

[4]  Alan Morris,et al.  A Practical Guide to Reliable Finite Element Modelling: Morris/A Practical Guide to Reliable Finite Element Modelling , 2008 .

[5]  Helmut J. Pradlwarter,et al.  Realistic and efficient reliability estimation for aerospace structures , 2005 .

[6]  Z. Sadovský,et al.  Imperfection measures of eigen- and periodic modes of axially loaded stringer-stiffened cylindrical shell , 2010 .

[7]  Cecil Armstrong,et al.  Efficient non-linear idealisations of aircraft fuselage panels in compression , 2004 .

[8]  Sayed A. Nassar,et al.  Handbook of bolts and bolted joints , 1998 .

[9]  A. J. Morris,et al.  Towards high fidelity finite element analysis , 1998 .

[10]  Theodore Baumeister,et al.  Marks' Standard Handbook For Mechanical Engineers (Standard Handbook for Mechanical Engineers) , 2006 .

[11]  Jeom Kee Paik,et al.  Nonlinear finite element method models for ultimate strength analysis of steel stiffened-plate structures under combined biaxial compression and lateral pressure actions—Part I: Plate elements , 2009 .

[12]  W. Ramberg,et al.  Description of Stress-Strain Curves by Three Parameters , 1943 .

[13]  A J Morris,et al.  The Qualification of Safety Critical Structures by Finite Element Analytical Methods , 1996 .

[14]  Laszlo Hetey.  Idealisation error control for aerospace virtual structural testing , 2009 .

[16]  Rade Vignjevic,et al.  Non-linear idealisation error analysis of a metallic stiffened panel loaded in compression , 2012 .

[17]  O. F. Hughes,et al.  Improved prediction of simultaneous local and overall buckling of stiffened panels , 2004 .