MODELING AND OPTIMIZATION OF ALUMINUM FOAM
Modeling and optimization of aluminum foam cylindrical double tubes under axial impact 4 maximum energy absorption and the minimum weight of foam-filled aluminum tubes under axial load were investigated . Moreover, maximizing the specific energy absorption and minimizing the peak crash force using multi-objective optimization hassp.info Impact crushing behavior of foam- lled paraboloid shells investigations on the crushing behavior of thin-walled sections lled with lightweight polyurethane foam (PU foam) was conducted by Lampinen and Jeryan . They concluded that the foam lling stabilizes the deformation of thin-walled tubes. Lu et al.  pointed out that the average crushing loads of thin-walled aluminum tubes lled by PU foam were greater thansp.info Plastic Resistance of Thin-walled Prismatic Tubes under for plastic resistance of a rectangular box tube undergoing a pure axial crushing load. For bending deformation, theoretical solutions were derived by Kecman , Abramowicz , and more recently by Wierzbicki . The torsional behavior of thin-walled beams or tubes well beyond the maximumsp.info Stress in Thin-Walled Cylinders or TubesWhen a thin-walled tube or cylinder is subjected to internal pressure a hoop and longitudinal stress are produced in the wall. For the thin walled equations below the wall thickness is less than 1/20 of tube or cylinder diameter.
Elastic stability of thin-walled cylindrical and conical
May 17, 2012 · Elastic stability of thin-walled cylindrical and conical shells under combined internal pressure and axial compression. Axial crushing behavior of the intermittent tack-welded cylindrical tubes. Experimental and Numerical Simulations of Buckling Problems in Lightweight Structures.sp.info Crush Mechanics of Thin-Walled Tubes - 1st Edition - Dai Jul 26, 2017 · Crush Mechanics of Thin-Walled Tubes describes the analysis and design of these lightweight elements and thoroughly explains the deformation behaviors of thin-walled hollow members under crushing loading. The book covers, in detail, thin-walled structures—under axial compression, bending, and torsion.sp.info A numerical study of the energy-absorption characteristics Sep 08, 2015 · This article investigates the energy-absorbing behaviour of lightweight foam structures reinforced with aluminium and steel cylindrical tubes. Initial testing focuses on establishing the influence of the inner diameter to thickness ratio ( D / t ) of the metal tubes on their specific energy-absorption characteristics under quasistatic sp.info The Buckling of Thin Cylindrical Shells Under Axial Aug 30, 2012 · Nonlinear Problems in the Dynamics of Thin Shells††These results were obtained in the course of research sponsored partially by the U.S. Army Research Office, Durham, under Grant No. DA-ARO(D)-31-124-G372 with the University of Florida, and partially by the Air Force Flight Dynamics Laboratory, Wright-Patterson Air Force Base, under Contract No. AF33 (657)-10220 with the General
Design Optimization of Crashworthiness in Square Tube as
M. J. Rezvani and A. Jahan, "Effect of initiator,design, and material on crashworthiness performance of thin-walled cylindrical tubes :A primary multi-criteria analysis in lightweight design," Thin-Walled Structures, vol. 96, pp. 169-182, November 2015.sp.info Crashworthiness Research Papers - Academia.eduThe deformation behaviour of cylindrical tubes have attracted the attention of researchers in recent years, due to their light weight, high energy absorption capacity and ease of fabrication. Despite their excellent crash performance, high initial peak force is a major shortcoming when they are subjected to axial sp.info MS - Quasi-static axial crushing of hexagonal origami Abstract. Thin-walled tubes are widely used as energy absorption devices for their low cost and high manufacturability. Introduction of the origami technique enables the tube to follow a pre-determined failure mode and to improve its energy absorption efficiency. This paper examines the energy absorption characteristics of the origami crash box under quasi-static axial crushing.sp.info Stress Analysis of Thin-Walled Pressure VesselsJan 15, 2015 · 2. Thin-Walled-Cylindrical Pressure Vessel A thin-walled circular tank AB subjected to internal pressure shown in gure 3Fi. A stress element with its faces parallel and perpendicular to the axis of the tank is shown on the wall of the tank. The normal stresses σ 1 and σ2 acting on the side faces of this element. No shear stresses act on these
Oblique crushing of truncated conical sandwich shell
of these thin-walled tubular structures have focused mainly on their crushing behavior and energy absorption under axial loading . During actual collision events, however, the thin-walledsp.info Investigation of the Energy Absorption Characteristics of “Experimental studies on the quasi-static axial crushing of steel columns filled with aluminum foam,” Int J Solids Struct. 37:4125-47. [ Links ] Shakeri, M., Mirzaeifar, R., and Salehghaffari, S. (2007). “New insights into the collapsing of cylindrical thin-walled tubes under axial impact load.sp.info Crush Strength Scientific.NetThe tubes were machined from aluminum alloy A5056 bar. Crush strength is estimated as an index of the energy absorption capacity of the tube. It increases with increasing the number of polygonal edges of the tube, although it almost saturates when the number of polygonal edges is more than 6. For the wider variety of polygonal tubes than that sp.info Buckling of thin-walled cylindrical shells under axial DOI:10.1002/nme.2612 Buckling of thin-walled cylindrical shells under axial compression Himayat Ullah∗, †, ‡ NESCOM, P.O. Box 2801, Islamabad, Pakistan SUMMARY Lightweight thin-walled cylindrical shells subjected to external loads are prone to buckling rather than strength failure.
High energy absorption efficiency of thin-walled conical
Thin-walled tubes are widely used in automotive vehicles as an energy absorber to avoid injuries or damage during accidents , because they offer many advantages , such as being lightweight, inexpensive to manufacture and having good energy absorption efficiency . Therefore, in recent years, the study  thin-walled tubeof ssp.info Dynamic axial crushing of multilayer core structures of Jan 01, 2004 · Read "Dynamic axial crushing of multilayer core structures of folded Chevron patterns, International Journal of Materials and Product Technology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.sp.info Crashworthiness Design for Bionic Bumper Structures
- AbstractIntroductionBionic DesignNumerical ModelNumerical Simulation and AnalysisConclusionAcknowledgmentsMany materials in nature exhibit excellent mechanical properties. In this study, we evaluated the bionic bumper structure models by using nonlinear finite element (FE) simulations for their crashworthiness under full-size impact loading. The structure contained the structural characteristics of cattail and bamboo. The results indicated that the bionic design enhances the specific energy absorption (SEA) of the bumper. The numerical results showed that the bionic cross-beam and bionic box of the bionic bumNumerical and experimental impact analysis of square crash Mar 15, 2013 · IntroductionScope of Works• The numerical and experimental analysis are limited to asquare column with cross section 38 x 38 mm and thickness1.15 mm subjected to axial impact load with initial velocitybelow 4.5 m/s.•. In parametric study, the column width is varied from 40 to 80mm with uniform thickness of 1.2 mm. The impact velocity is4.5 sp.info
Experimental Investigation on the Deformation and Fracture