Design of Thin Walled Columns for Crash Energy Management — Their Strength and Mode of Collapse

Mahmood, Hikmat F.; Paluszny, Adriana

doi:10.4271/811302

Cited by 93 publications

(29 citation statements)

References 3 publications

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“…Previous experimental studies have indicated that the crush energy absorbed by tubes varies approximately as the tube thickness raised to the 1.6 to 1.8 power [3,4]. We have studied this phenomenon with our DYNA3D finite-element code and found this trend to be duplicated numerically.…”

Section: Introductionmentioning

confidence: 85%

Energy Absorption in Aluminum Extrusions for a Spaceframe Chassis

Logan¹,

Scott²,

Parkinson³

1995

SAE Technical Paper Series

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Thisisa preprint of a paper intended for publication in a journalor pmceedhga S i n c e changes may k made befar publication, this preprint is made available with tbe rurd&d& that it will n o t a cited ax repoda&d without the pennidon of the author. This work describes the design, finite-element analysis, and verifications performed by LLNL and Kaiser Aluminum for the prototype design of the CALSTART Running Chassis purpose-built electric vehicle. Component level studies, along with our previous experimental and finite-element works, provided the confidence to study the crashworthiness of a complete aluminum spaceframe. Effects of rail geometry, size, and thickness were studied in order to achieve a controlled crush of the front end structure. ThisThese included the performance of the spaceframe itself, and the additive effects of the powertrain cradle and powertrain (motor/controller in this case) as well as suspension. Various design iterations for frontal impact at moderate and high speed are explored. INTRODUCTION AND BACKGROUND

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Section: Introductionmentioning

confidence: 85%

Energy Absorption in Aluminum Extrusions for a Spaceframe Chassis

Logan¹,

Scott²,

Parkinson³

1995

SAE Technical Paper Series

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“…The hat shaped members and the thin-walled members mostly used for the vehicle structural member designed to go through proper plastic deformation at the time of collision, so as to restrain the passenger space from being deformed and thus to protect the passengers Jones and Weirzbicki, 1993 Studies about energy absorption of the structural members so far have induced the theoretical formulas about mean collapse stress with regard to the collapse behavior under the static load and those about mean collapse strength in consideration of the absorption energy by the movement of plastic hinge, and have performed tests and comparisons accordingly (Aya and Takhashi, 1974;Mahood and Paluzny, 1981). Other studies suggested geometric models for accordion-shaped collapse folds, and calculated the static mean collapse load by energy equilibrium condition.…”

Section: Instructionsmentioning

confidence: 98%

The energy absorption control characteristics of Al thin-walled tube under quasi-static axial compression

Lee

Kim²,

Yang

2008

Journal of Materials Processing Technology

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“…To prevent the paneling collapse of square box columns of mild-and high-strength steels, the compactness criterion (Mahmood and Paluszny, 1981) assumes a plate-type column under uniform axial compression and requires that the critical elastic local buckling stress be greater than the maximum (crippling) load-carrying strength of the component. In terms of a thickness and cross-sectional width ratio, t/b is required to be greater than or equal to {0.48[r y (1 À m 2 )/E] 1/2 }, where t is the wall thickness; b is the width of the ''buckling'' plate (same units as t); r y is the yield strength of the material; m is Poisson's ratio; and E is the modulus of elasticity (same units as r y ).…”

Section: Design Criteria For Axial Crushmentioning

confidence: 99%

A study on an axial crush configuration response of thin-wall, steel box components: The quasi-static experiments

DiPaolo

Tom

2006

International Journal of Solids and Structures

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An experimental investigation was performed to study a specific axial crush configuration response of steel, square box components under quasi-static testing conditions. For a specific cross-sectional geometry/fabrication process, test specimens were obtained from commercially produced, welded tube lengths of ASTM A36 and ASTM A513 Type 1 plain low-carbon steels and AISI 316 and AISI 304 austenitic stainless steels. Removable grooved caps were used to constrain tube test specimen ends, and collapse initiators in the form of shallow machined grooves were used to control the initial transverse deformations of the test specimen sidewalls. The progressive plastic deformation for all of the test specimens was restricted to the prototype configuration response (fold formation process and the corresponding axial load-axial displacement curve shape) of the symmetric axial crush mode. Crush characteristics were evaluated and, for each material type, observed differences were less than 7% for maximum and minimum load magnitudes and less than 2% for energy absorption, displacement, and mean load quantities in both the initial phase and the secondary folding phase cycles. Overall, results of the study indicate that for a significant range of material strengths, a controlled and repeatable energy absorption process can be obtained for commercially produced steel box components undergoing symmetric axial crush response. Published by Elsevier Ltd.

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Design of Thin Walled Columns for Crash Energy Management — Their Strength and Mode of Collapse

Cited by 93 publications

References 3 publications

Energy Absorption in Aluminum Extrusions for a Spaceframe Chassis

Energy Absorption in Aluminum Extrusions for a Spaceframe Chassis

The energy absorption control characteristics of Al thin-walled tube under quasi-static axial compression

A study on an axial crush configuration response of thin-wall, steel box components: The quasi-static experiments

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