Crushing of soft-core sandwich profiles: experiments and analysis

被引：7

作者：

Mohr, D ^{[1
]}

Wierzbicki, T ^{[1
]}

机构：

[1] MIT, Impact & Crashworthiness Lab, Cambridge, MA 02139 USA

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2003年 / 45卷 / 02期

关键词：

sandwich structures; shear folding; shear testing; crashworthiness; energy absorption; HSSA;

D O I：

10.1016/S0020-7403(03)00053-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present paper investigates the mechanics of the crushing of sandwich profiles through component testing and theoretical analysis. Experiments were run showing that the underlying folding mechanism of sandwich profiles is very different from that of solid-section thin-walled structures. In particular, the shear behavior of the core material was found to strongly influence the mechanics of energy absorption. The analysis focuses on the crushing behavior of double-cell profiles that are made of soft-core hybrid stainless steel assembly (HSSA) sheets. Both material and structural tests were performed. It is demonstrated that the shear strength of the HSSA fiber core is small as compared to the face sheet properties. When subjected to bending, the core deformed in the shear mode, whereas the facings bent independently. Based on this mechanism, a new shear-folding model for sandwich profiles is derived, incorporating the "shear crushing" of the sandwich core material. Theoretical predictions of the mean crushing force based on the present model compared very well with the experimental data. (C) 2003 Published by Elsevier Science Ltd.

引用

页码：253 / 271

页数：19

共 13 条

[1] Axial crushing of multicorner sheet metal columns
Abramowicz, W
Wierzbicki, T
[J]. JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME, 1989, 56 (01): : 113 - 120
[2] Transition from initial global bending to progressive buckling of tubes loaded statically and dynamically
Abramowicz, W
Jones, N
[J]. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 1997, 19 (5-6) : 415 - 437
[3] Abramowicz W., 1984, Int. J. Impact Eng, V2, P179, DOI [10.1016/0734-743X(84)90005-8, DOI 10.1016/0734-743X(84)90005-8]
[4] Alexander J.M., 1960, Quart J Mech Appl Math, V13, P10, DOI [10.1093/qjmam/13.1.10, DOI 10.1093/QJMAM/13.1.10]
[5] GUSTAFSSON RNG, 2000, SANDWICH CONSTRUCT 5, V1, P169
[6] GUSTAFSSON RNG, Patent No. 09214333
[7] MOHR D, 2000, 47 MIT IMP CRASHW LA
[8] MOHR D, IN PRESS EXPT MECH
[9] STATIC AND DYNAMIC AXIAL CRUSHING OF FOAM-FILLED SHEET-METAL TUBES
REID, SR
REDDY, TY
GRAY, MD
[J]. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 1986, 28 (05) : 295 - &
[10] Santosa SP., 1999, THESIS MIT CAMBRIDGE

← 1 2 →