scholarly journals EXPERIMENTAL STUDY ON ENERGY ABSORPTION CAPACITY OF COLUMNS OF LOW STFFL STRUCTURES : Part 1. Energy Absorption Capacity of H-Shaped Steel Columns Subjected to Monotonic Loading and Cyclic Loading with Constant Deflection Amplitudes

1979 ◽  
Vol 279 (0) ◽  
pp. 65-75 ◽  
Author(s):  
TOSHIRO SUZUKI ◽  
KEN-ICHIRO TAMAMATSU
Keyword(s):  
Experimental Study ◽  
Cyclic Loading ◽  
Energy Absorption ◽  
Absorption Capacity ◽  
Monotonic Loading ◽  
Energy Absorption Capacity ◽  
Steel Columns

An experimental study on the energy absorption capacity of thin-walled castings

2006 ◽  
Vol 32 (5) ◽  
pp. 702-724 ◽  
Author(s):  
Cato Dørum ◽  
Odd Sture Hopperstad ◽  
Odd-Geir Lademo ◽  
Magnus Langseth
Keyword(s):  
Experimental Study ◽  
Energy Absorption ◽  
Absorption Capacity ◽  
Energy Absorption Capacity ◽  
Thin Walled

scholarly journals Cyclic Loading Behaviour of Externally Bonded CFRP Reinforced Concrete Beam-Column Joint

2021 ◽  
pp. 1310-1321
Author(s):  
Harsh N. Bhutwala ◽  
Prof. Vishal B. Patel ◽  
J. D. Rathod ◽  
Prof. A. N. Desai
Keyword(s):  
Cyclic Loading ◽  
Energy Absorption ◽  
Failure Modes ◽  
Reinforced Concrete Beam ◽  
Absorption Capacity ◽  
Rc Beam ◽  
Energy Absorption Capacity ◽  
Externally Bonded ◽  
Column Joint ◽  
Strengthening Technique

Cyclic loading behaviour of RC beam-column joints strengthened with externally bonded Carbon Fiber Reinforced Plastic (CFRP) was analysed through Abaqus CAE software. Effect of the number of CFRP layers and the strengthening technique on failure modes, hysteretic curves, skeleton curves, ductility, and energy dissipation capacity were studied. The results show that the strengthening of RC beam-column joints by externally bonded CFRP can effectively improve the cyclic loading behaviour. Strengthening the joint by fiber bands enhances ductility and energy absorption capacity. The increase in the number of CFRP layers leads to enhance energy absorption capacity significantly as compared to ductility.

Cyclic Loading of Externally Reinforced Masonry Walls Confined by Frames

1975 ◽  
Vol 2 (4) ◽  
pp. 489-493 ◽  
Author(s):  
W. K. Tso ◽  
A. Rutenberg ◽  
A. C. Heidebrecht
Keyword(s):  
Cyclic Loading ◽  
Energy Absorption ◽  
Axial Stress ◽  
Concrete Block ◽  
Absorption Capacity ◽  
Steel Reinforcement ◽  
Stiffness Degradation ◽  
Energy Absorption Capacity ◽  
Axial Forces ◽  
Reinforced Masonry

Experimental results are presented on three externally reinforced concrete block walls subjected to in-plane cyclic lateral loading, the walls being confined by flexible steel frames. All three specimens were of similar construction, the varying parameter being the steel reinforcement ratio in the outer skins. The load deflection curves, stiffness degradation characteristics, energy absorption capacity, as well as axial stress in the confining frame columns, are discussed. The externally reinforced walls held their integrity even under a large number of cycles of reversed load. In this respect, externally reinforced masonry behaves under cyclic loading at least as well as internally reinforced masonry. It is concluded that changes in steel reinforcement ratios do not materially affect the failure load although this ratio may have an important effect on the stiffness degradation and the energy absorption capacity of the assembly. The evaluation of the axial forces in the columns on the basis of the truss analogy appears to be substantiated by the test results.

Numerical and experimental investigation for enhancing the energy absorption capacity of the novel three-dimensional printed sandwich structures

2021 ◽  
pp. 146442072199749
Author(s):  
H Geramizadeh ◽  
S Dariushi ◽  
S Jedari Salami
Keyword(s):  
Energy Absorption ◽  
Sandwich Structures ◽  
Three Dimensional ◽  
Absorption Capacity ◽  
The Novel ◽  
Energy Absorption Capacity ◽  
Fused Deposition ◽  
Honeycomb Sandwich ◽  
Out Of Plane ◽  
Vertical Walls

The current study focuses on designing the optimal three-dimensional printed sandwich structures. The main goal is to improve the energy absorption capacity of the out-of-plane honeycomb sandwich beam. The novel Beta VI and Alpha VI were designed in order to achieve this aim. In the Beta VI, the connecting curves (splines) were used instead of the four diagonal walls, while the two vertical walls remained unchanged. The Alpha VI is a step forward on the Beta VI, which was promoted by filleting all angles among the vertical walls, created arcs, and face sheets. The two offered sandwich structures have not hitherto been provided in the literature. All models were designed and simulated by the CATIA and ABAQUS, respectively. The three-dimensional printer fabricated the samples by fused deposition modeling technique. The material properties were determined under tensile, compression, and three-point bending tests. The results are carried out by two methods based on experimental tests and finite element analyses that confirmed each other. The achievements provide novel insights into the determination of the adequate number of unit cells and demonstrate the energy absorption capacity of the Beta VI and Alpha VI are 23.7% and 53.9%, respectively, higher than the out-of-plane honeycomb sandwich structures.

scholarly journals Dynamic crushing behavior of closed-cell aluminum foams based on different space-filling unit cells

2021 ◽  
Vol 21 (3) ◽  
Author(s):  
S. Talebi ◽  
R. Hedayati ◽  
M. Sadighi
Keyword(s):  
Surface Area ◽  
Dynamic Behavior ◽  
Energy Absorption ◽  
Peak Stress ◽  
Absorption Capacity ◽  
Unit Cell ◽  
Lattice Structures ◽  
Energy Absorption Capacity ◽  
Closed Cell ◽  
Unit Cells

AbstractClosed-cell metal foams are cellular solids that show unique properties such as high strength to weight ratio, high energy absorption capacity, and low thermal conductivity. Due to being computation and cost effective, modeling the behavior of closed-cell foams using regular unit cells has attracted a lot of attention in this regard. Recent developments in additive manufacturing techniques which have made the production of rationally designed porous structures feasible has also contributed to recent increasing interest in studying the mechanical behavior of regular lattice structures. In this study, five different topologies namely Kelvin, Weaire–Phelan, rhombicuboctahedron, octahedral, and truncated cube are considered for constructing lattice structures. The effects of foam density and impact velocity on the stress–strain curves, first peak stress, and energy absorption capacity are investigated. The results showed that unit cell topology has a very significant effect on the stiffness, first peak stress, failure mode, and energy absorption capacity. Among all the unit cell types, the Kelvin unit cell demonstrated the most similar behavior to experimental test results. The Weaire–Phelan unit cell, while showing promising results in low and medium densities, demonstrated unstable behavior at high impact velocity. The lattice structures with high fractions of vertical walls (truncated cube and rhombicuboctahedron) showed higher stiffness and first peak stress values as compared to lattice structures with high ratio of oblique walls (Weaire–Phelan and Kelvin). However, as for the energy absorption capacity, other factors were important. The lattice structures with high cell wall surface area had higher energy absorption capacities as compared to lattice structures with low surface area. The results of this study are not only beneficial in determining the proper unit cell type in numerical modeling of dynamic behavior of closed-cell foams, but they are also advantageous in studying the dynamic behavior of additively manufactured lattice structures with different topologies.

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