Forming new steel-framed openings in load-bearing masonry walls: design methods and nonlinear finite element simulations

2019 ◽  
Vol 17 (5) ◽  
pp. 2647-2670 ◽  
Author(s):  
Lorenzo Billi ◽  
Francesco Laudicina ◽  
Luca Salvatori ◽  
Maurizio Orlando ◽  
Paolo Spinelli
Keyword(s):  
Finite Element ◽  
Design Methods ◽  
Finite Element Simulations ◽  
Nonlinear Finite Element ◽  
Masonry Walls ◽  
Load Bearing

A Compliant Transmission Mechanism With Intermittent Contacts for Cycle-Doubling

2006 ◽  
Vol 129 (1) ◽  
pp. 114-121 ◽  
Author(s):  
Nilesh D. Mankame ◽  
G. K. Ananthasuresh
Keyword(s):  
Finite Element ◽  
Conceptual Design ◽  
Finite Element Simulations ◽  
Nonlinear Finite Element ◽  
Transmission Mechanism ◽  
Input Frequency ◽  
Length Scales ◽  
Wide Range ◽  
Macro Scale ◽  
Functional Prototype

A novel compliant transmission mechanism that doubles the frequency of a cyclic input is presented in this paper. The compliant cycle-doubler is a contact-aided compliant mechanism that uses intermittent contact between itself and a rigid surface. The conceptual design for the cycle-doubler was obtained using topology optimization in our earlier work. In this paper, a detailed design procedure is presented for developing the topology solution into a functional prototype. The conceptual design obtained from the topology solution did not account for the effects of large displacements, friction, and manufacturing-induced features such as fillet radii. Detailed nonlinear finite element analyses and experimental results from quasi-static tests on a macro-scale prototype are used in this paper to understand the influence of the above factors and to guide the design of the functional prototype. Although the conceptual design is based on the assumption of quasi-static operation, the modified design is shown to work well in a dynamic setting for low operating frequencies via finite element simulations. The cycle-doubler design is a monolithic elastic body that can be manufactured from a variety of materials and over a range of length scales. This makes the design scalable and thus adaptable to a wide range of operating frequencies. Explicit dynamic nonlinear finite element simulations are used to verify the functionality of the design at two different length scales: macro (device footprint of a square of 170mm side) at an input frequency of 7.8Hz; and meso (device footprint of a square of 3.78mm side) at an input frequency of 1kHz.

Research on Load Bearing Behavior of Ship Stiffened Plates under Cyclic Loads

2014 ◽  
Vol 904 ◽  
pp. 446-449
Author(s):  
Hu Wei Cui ◽  
Ping Yang ◽  
Can Shen ◽  
Liang Zhou
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Ultimate Strength ◽  
Nonlinear Finite Element ◽  
Stiffened Plates ◽  
Cyclic Loads ◽  
Nonlinear Finite Element Method ◽  
Load Bearing ◽  
Different Dimensions ◽  
Bearing Behavior

This paper adopts nonlinear finite element method to study the load bearing behavior of ship stiffened plates with different dimensions. The research focuses on the compressive ultimate strength, axial rigidity, and residual plastic deflection of the stiffened plates under cyclic compressive and tensile loads. The results indicate that the compressive ultimate strength and axial rigidity of stiffened plates decrease with the incremental cyclic loads significantly, meanwhile, the residual plastic deflection increases with the cyclic loads.

scholarly journals Research On Calculation Method of Serpentine Pipe Bend

2021 ◽  
Vol 245 ◽  
pp. 01043
Author(s):  
Xuchen Zhu ◽  
Yannan Du ◽  
Bin Ren ◽  
Xiaoying Tang ◽  
Zhigang Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
High Pressure ◽  
Working Conditions ◽  
Calculation Method ◽  
Optimization Design ◽  
Structural Characteristics ◽  
Design Methods ◽  
Finite Element Simulations ◽  
Pipe Bend ◽  
The Future

Because of its structural characteristics, the serpentine high-pressure heater has thinner tubesheet compared with the traditional U-tube high-pressure heater, which solves the bottleneck of tubesheet manufacturing and becomes an important auxiliary machine for millions of secondary reheating units in the future. In this paper, the typical working conditions are selected, and the bending design methods of domestic and foreign serpentine tubes are adopted respectively. The results show that compared with Chinese standards, the bending can be thinned. Subsequent tests and finite element simulations verify the reliability of foreign methods and explore the optimization design methods of domestic serpentine tubes.

scholarly journals Nonlinear Finite Element Simulations of Poling Processes in Piezoceramic Devices

PAMM ◽  
2004 ◽  
Vol 4 (1) ◽  
pp. 286-287 ◽  
Author(s):  
Bernd Laskewitz ◽  
Marc Kamlah
Keyword(s):  
Finite Element ◽  
Finite Element Simulations ◽  
Nonlinear Finite Element
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