Cross-section crushing behaviour of hat-sections (Part I: Numerical modelling)

Hofmeyer, H.

doi:10.1016/j.tws.2005.03.009

Cited by 25 publications

(10 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The basic angle θ of isosceles trapezium for H c = 4 mm and 8 mm is 63.4° and 66.4°, respectively. What should be noted here is that the corner radius of corrugated core is an important parameter to its crush behavior [31,32]. After measuring, it is found that the corner radius for current samples is around 1.5 mm for both two configurations.…”

Section: Methodsmentioning

confidence: 90%

Response of aluminum corrugated sandwich panels under foam projectile impact – Experiment and numerical simulation

Wang

et al. 2016

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

The paper studied the dynamic response of square aluminum corrugated sandwich panels under projectile impact. The aluminum foam projectile was utilized to apply the impulse on the sandwich panels. In order to increase the applied impulse under controlled impact velocity ( V < 200 m/s), a cylindrical Nylon mass was adhered to the back of foam projectile. Corrugated sandwich panels with two different configurations were tested and their typical deformation modes were obtained in the experiment. Based on the experiment, corresponding numerical simulations were presented. The energy absorption and deformation mechanism of corrugated sandwich panels were studied through the simulation. The influence of impact velocity, thickness of face sheet and wall thickness of corrugated core were discussed. The results indicated that the corrugated sandwich panels with smaller core height produce larger deformation than the panels with larger core height. The face sheets of corrugated sandwich panel absorbed comparable amount of energy with the corrugated core. The velocity histories show that under the combined action of aluminum foam projectile and nylon back mass, a second peak velocity of front face sheet can be produced during the impact process, which is defined as “accelerating impact stage” in current study. The influence of “accelerating impact stage” to the response of structures is sensitive to the impact velocity.

show abstract

Section: Methodsmentioning

confidence: 90%

Response of aluminum corrugated sandwich panels under foam projectile impact – Experiment and numerical simulation

Wang

et al. 2016

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

show abstract

“…Mesh sensitivity analyses were performed to verify the number of elements. Hofmeyer [38][39] reported similar modelling technique for cross-section crushing behaviour of hat sections.…”

Section: Geometry and Materials Propertiesmentioning

confidence: 99%

Cold-formed steel channel sections under end-two-flange loading condition: Design for edge-stiffened holes, unstiffened holes and plain webs

Uzzaman

Lim

Nash

et al. 2020

Thin-Walled Structures

View full text Add to dashboard Cite

In cold-formed steel (CFS) channel sections, web holes are becoming increasingly popular. Such holes, however, result in the sections becoming more susceptible to web crippling, especially under concentrated loads applied near the web holes. Traditional web holes are normally punched or bored and are unstiffened. Recently, a new generation of CFS channel sections with edge-stiffened web holes has been developed by the CFS industry and is being widely used. However, no research is available in the literature which investigated the web crippling strength of CFS channel sections with edgestiffened circular web holes under the end-two-flange (ETF) loading conditions. A combination of experimental tests and non-linear FEA were used to investigate the effect of such stiffened holes on web crippling behaviour under ETF loading conditions. The results of 30 web crippling tests are presented. Non-linear FE models are described, and the results are compared against the laboratory test results; a good agreement was obtained in terms of both the strength and failure modes. The results indicate that the stiffened holes can significantly improve the web crippling strength of CFS channel sections. A parametric study involving 1116 FEA was then performed, covering the effect of different hole sizes, edge-stiffener lengths and fillet radii, length of the bearing plates and position of holes in the web. Finally, design recommendations in the form of web crippling strength reduction factors are proposed, that are conservative to both the experimental and FE results. PFEA Web crippling strength per web predicted from finite element (FEA); rq Inside fillet radius between web and hole edge-stiffener; ri Inside fillet radius of section; ROSH Reduction factor for edge-stiffened holes offset to the bearing plates RCSH Reduction factor for edge-stiffened holes down the bearing plates RP (OSH) Proposed reduction factor for edge-stiffened holes offset to the bearing plates

show abstract

“…Yet, web crippling simulations required long computational times that could result in unfeasible simulations [14,26]. This was overcome with the advancements in computing and numerical modelling software in the late 1990s and early 2000s making therefore possible to conduct the first parametric studies successfully [27][28][29][30]. Since then, several research studies on cold-formed steel sections subjected to web crippling have been published with the aim to improve and extend the applicability of the empiric equations given in the above mentioned design standards with a focus on channel sections [31][32][33][34][35][36], channel sections with perforations [37][38][39][40] as well as proprietary beams [41] and SupaCee sections [42].…”

Section: Introductionmentioning

confidence: 99%

“…Although material and geometrical nonlinearities make predictive design equations based on first principles hard to obtain, efforts were made to derive analytical models for the treatment of web crippling [11,14,28,[54][55][56][57][58][59][60][61]. These studies were based on traditional yield line mechanisms that combined with experimental observations were used to define web crippling collapse mechanisms and post buckling behaviour upon which to derive analytical equations.…”

Section: Introductionmentioning

confidence: 99%

Slenderness-based design for sigma sections subjected to interior one flange loading

Almatrafi

Theofanous

Bock

et al. 2021

Thin-Walled Structures

View full text Add to dashboard Cite

Due to their thin-walled nature and complex geometry, cold-formed steel purlins are prone to a variety of instabilities. Sigma purlins are a family of cold-formed steel members with folding-lines along their webs. The non-straight geometry of their web is beneficial in terms of reducing the susceptibility of the web to local buckling, however, it increases their susceptibility to web crippling when the purlins are subjected to concentrated transverse loads and hence it may reduce their overall moment resistance. This paper reports a series of experiments on sigma purlins under the interiorone-flange (IOF) loading condition. Two different section geometries and three different bearing plate widths were examined. To investigate further the effect of web geometry on the IOF web crippling strength of sigma sections, an FE model was developed and validated against the reported test results. Following successful replication of the experimental observations, a comprehensive parametric study was performed, and several sigma sections covering a wide range of crosssectional geometries and slenderness were numerically modelled. Finally, a slenderness-based (or direct strength) design approach previously developed for the web crippling design of channel and hat sections is extended to sigma sections.

show abstract

Cross-section crushing behaviour of hat-sections (Part I: Numerical modelling)

Cited by 25 publications

References 7 publications

Response of aluminum corrugated sandwich panels under foam projectile impact – Experiment and numerical simulation

Response of aluminum corrugated sandwich panels under foam projectile impact – Experiment and numerical simulation

Cold-formed steel channel sections under end-two-flange loading condition: Design for edge-stiffened holes, unstiffened holes and plain webs

Slenderness-based design for sigma sections subjected to interior one flange loading

Contact Info

Product

Resources

About