Experimental study of inelastic buckling strength and stiffness requirements for longitudinally stiffened panels

2009 ◽  
Vol 31 (5) ◽  
pp. 1141-1153 ◽  
Author(s):  
Byung H. Choi ◽  
Min-oh Hwang ◽  
Tae-yang Yoon ◽  
Chai H. Yoo
Keyword(s):  
Experimental Study ◽  
Inelastic Buckling ◽  
Stiffened Panels ◽  
Buckling Strength ◽  
Strength And Stiffness

An experimental study on out-of-plane inelastic buckling strength of fixed steel arches

2015 ◽  
Vol 98 ◽  
pp. 118-127 ◽  
Author(s):  
Yan-Lin Guo ◽  
Si-Yuan Zhao ◽  
Yong-Lin Pi ◽  
Mark Andrew Bradford ◽  
Chao Dou
Keyword(s):  
Experimental Study ◽  
Inelastic Buckling ◽  
Buckling Strength ◽  
Out Of Plane

scholarly journals Effects of plies orientations and initial geometric imperfections on buckling strength of a composite stiffened panel

2018 ◽  
Vol 191 ◽  
pp. 00008
Author(s):  
Ikram Feddal ◽  
Abdellatif Khamlichi ◽  
Koutaiba Ameziane
Keyword(s):  
Stiffened Panel ◽  
Buckling Mode ◽  
Element Analysis ◽  
Geometric Imperfections ◽  
Stiffened Panels ◽  
Specific Strength ◽  
Euler Buckling ◽  
Buckling Behavior ◽  
Composite Stiffened Panel ◽  
Strength And Stiffness

The use of composite stiffened panels is common in several activities such as aerospace, marine and civil engineering. The biggest advantage of the composite materials is their high specific strength and stiffness ratios, coupled with weight reduction compared to conventional materials. However, any structural system may reach its limit and buckle under extreme circumstances by a progressive local failure of components. Moreover, stiffened panels are usually assembled from elementary parts. This affects the geometric as well as the material properties resulting in a considerable sensitivity to buckling phenomenon. In this work, the buckling behavior of a composite stiffened panel made from carbon Epoxy Prepregs is studied by using the finite element analysis under Abaqus software package. Different plies orientations sets were considered. The initial distributed geometric imperfections were modeled by means of the first Euler buckling mode. The nonlinear Riks method of analysis provided by Abaqus was applied. This method enables to predict more consistently unstable geometrically nonlinear induced collapse of a structure by detecting potential limit points during the loading history. It was found that plies orientations of the composite and the presence of geometric imperfections have huge influence on the strength resistance.

A study into the ability of SPD to restore the buckling strength and modes of rib stiffened panels with simulated stress corrosion cracks

2017 ◽  
Vol 8 (1) ◽  
pp. 63-78 ◽  
Author(s):  
Rhys Jones ◽  
Neil Matthews ◽  
Daren Peng ◽  
Nicholas Orchowski
Keyword(s):  
Experimental Study ◽  
Stress Corrosion ◽  
Carrying Capacity ◽  
Particle Deposition ◽  
Load Carrying Capacity ◽  
Load Path ◽  
Premature Failure ◽  
Content Type ◽  
Buckling Strength ◽  
Load Carrying

Purpose The purpose of this paper is to describe the results of a combined numerical and experimental study into the ability of supersonic particle deposition (SPD) to restore the load carrying capacity of rib stiffened wing planks with simulated stress corrosion cracking (SCC). Design/methodology/approach In this context the experimental results reveal that SCC can result in a dramatic reduction in the load carrying capacity of the structure and catastrophic failure via cracking that tears the length of the structure through buckling. A combined numerical and experimental study then reveals how this reduction, in the load carrying capacity can be overcome by using SPD. Findings This paper is the first to show that SPD can be used to restore the load carrying capacity of rib stiffened structures with SCC. It also shows that SPD repairs can be designed to have only a minimal effect on the local stiffness and hence on the load path. However, care should be taken to ensure that the design is such that premature failure of the SPD does not occur. Originality/value This is the first paper to show that a thin layer of SPD deposited 7,075 aluminium alloy powder on either side of the SCC-simulated stiffener has the potential to restore the load carrying capability of a rib stiffened structure. As such it represents an important first step into establishing the potential for SPD to restore the buckling strength of rib stiffened wing panels containing SCC.

Cooperation Pullout Test of Double Self-Tapping Screws in Wood Structures

2011 ◽  
Vol 374-377 ◽  
pp. 2520-2524 ◽  
Author(s):  
Gang Shi ◽  
Jian Xing Zhang ◽  
Yuan Qing Wang ◽  
Hui Juan Huang ◽  
Zheng Hong Zhang
Keyword(s):  
Experimental Study ◽  
Pullout Test ◽  
The Self ◽  
Connection Strength ◽  
Wood Structure ◽  
Wood Structures ◽  
Pullout Resistance ◽  
Loading Tests ◽  
The Common ◽  
Strength And Stiffness

In this paper, the experimental study on the self-tapping screw’s pullout resistance in the wood structure was conducted. Domestic ordinary screws were used together with imported or domestic wood to fabricate 6 screw connection specimens in wooden walls. Then monotonic loading tests were conducted and it can be concluded that, the common round screw connection strength mainly depends on the failure mode, the lack of cooperation effect significantly influences the strength of screw connections, and the dispersion of screw connection stiffness is high. So, to obtain formulae for the self-tapping screw connection strength and stiffness by further experimental study will be very necessary.

Measurement of residual stresses and distortions in stiffened panels

1977 ◽  
Vol 12 (2) ◽  
pp. 107-116 ◽  
Author(s):  
W L Somerville ◽  
J W Swan ◽  
J D Clarke
Keyword(s):  
Residual Stresses ◽  
Elastic Strain ◽  
Welded Structures ◽  
Stiffened Panels ◽  
Buckling Strength ◽  
Ship Hulls ◽  
Future Design ◽  
Design Calculations ◽  
Initial Results

Methods for measuring residual stresses and distortions in welded structures are described and initial results are given of a survey being carried out during manufacture of warship hull sections. The stresses are determined by measuring the elastic strain induced in the plate and stiffeners due to contraction of the stiffener welds, and profiles of the stiffener and plating after welding have been obtained. The survey is intended to provide information for use in future design calculations of the buckling strength of ship hulls.

scholarly journals Experimental study on strength and stiffness connection of wooden truss structure

2017 ◽  
Vol 101 ◽  
pp. 01015
Author(s):  
Altho Sagara ◽  
Johannes Adhijoso Tjondro ◽  
Husain Abdurrahman Shiddiq
Keyword(s):  
Experimental Study ◽  
Truss Structure ◽  
Strength And Stiffness
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