scholarly journals Multigrid Equation Solvers for Large Scale Nonlinear Finite Element Simulations

1999 ◽  
Author(s):  
Mark F. Adams
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Finite Element Simulations ◽  
Nonlinear Finite Element

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.

Verification Test for Hybrid Seismic Experimental Method Using Nonlinear Finite Element Method

2005 ◽  
Author(s):  
Yoshihiro Dozono ◽  
Mayumi Fukuyama ◽  
Toshihiko Horiuchi ◽  
Takao Konno ◽  
Michiya Sakai ◽  
...  
Keyword(s):  
Finite Element ◽  
Numerical Model ◽  
Experimental Method ◽  
Large Scale ◽  
Branch Pipe ◽  
Nonlinear Finite Element ◽  
Shaking Table ◽  
Piping System ◽  
Analysis Tool ◽  
Seismic Testing

An improved substructure hybrid seismic experimental method has been developed. This method consists of numerical computations using a general-purpose nonlinear finite element analysis tool and a pseudo-dynamic vibration test. Therefore, it enables seismic testing of large-scale structures that cannot be loaded onto a shaking table. The method also visualizes both data measured by sensors placed on the specimen and the results of the numerical analysis, and it helps us to understand the behavior of an entire structure consisting of a specimen and a numerical model. We performed verification tests for a piping system, in which we used a numerical model including supports, valves, and a branch pipe, and a specimen including two elbows. As results of tests, we conclude that the developed system has enough accuracy to be used as a seismic testing method.

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

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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