Preliminary finite element analyses on the experimental mock-up frames of FREEDAM research project

2019 ◽  
Author(s):  
Mariana Zimbru ◽  
Roberto Tartaglia ◽  
Raffaele Landolfo
Keyword(s):  
Finite Element ◽  
Finite Element Analyses ◽  
Research Project

scholarly journals Engineering Studies on Joint Bar Integrity: Part I — Field Surveys and Observed Failure Modes

2014 ◽  
Author(s):  
David Y. Jeong ◽  
Radim Bruzek ◽  
Ali Tajaddini
Keyword(s):  
Finite Element ◽  
Failure Modes ◽  
Structural Integrity ◽  
Transportation Systems ◽  
Finite Element Analyses ◽  
Research Project ◽  
Field Surveys ◽  
Technology Center ◽  
Survey Team ◽  
Engineering Studies

This paper is the first of a two-part series describing a research project, sponsored by the Federal Railroad Administration (FRA), to study the structural integrity of joint bars. In Part I of this series, observations from field surveys conducted on revenue service track are presented. Automated and visual inspections of rail joints were conducted to identify defective joint bars. Detailed information and measurements were collected at various joint locations. The survey team consisted of personnel from ENSCO, Inc. and Transportation Technology Center, Inc. (TTCI), working in cooperation with staff from participating railroads. Part II of this series describes the development of finite element analyses of jointed rail, which is being carried out by the Volpe National Transportation Systems Center (Volpe Center).

Design of flexure revolute joint based on compliance and stiffness ellipsoids

2021 ◽  
pp. 095441002110169
Author(s):  
Jing Zhang ◽  
Hong-wei Guo ◽  
Juan Wu ◽  
Zi-ming Kou ◽  
Anders Eriksson
Keyword(s):  
Finite Element ◽  
Single Point ◽  
Synthesis Method ◽  
Nonlinear Finite Element ◽  
Finite Element Analyses ◽  
Rotational Stiffness ◽  
Rotational Angle ◽  
Parameterized Model ◽  
Flexure Joints ◽  
Translational Stiffness

In view of the problems of low accuracy, small rotational angle, and large impact caused by flexure joints during the deployment process, an integrated flexure revolute (FR) joint for folding mechanisms was designed. The design was based on the method of compliance and stiffness ellipsoids, using a compliant dyad building block as its flexible unit. Using the single-point synthesis method, the parameterized model of the flexible unit was established to achieve a reasonable allocation of flexibility in different directions. Based on the single-parameter error analysis, two error models were established to evaluate the designed flexure joint. The rotational stiffness, the translational stiffness, and the maximum rotational angle of the joints were analyzed by nonlinear finite element analyses. The rotational angle of one joint can reach 25.5° in one direction. The rotational angle of the series FR joint can achieve 50° in one direction. Experiments on single and series flexure joints were carried out to verify the correctness of the design and analysis of the flexure joint.

Finite-element analyses of light timber-framed walls with and without openings

2017 ◽  
Vol 170 (8) ◽  
pp. 555-569 ◽  
Author(s):  
Abdullah Togay ◽  
Özgür Anil ◽  
Ümmü Karagöz Işleyen ◽  
İbrahim Ediz ◽  
Cengizhan Durucan
Keyword(s):  
Finite Element ◽  
Finite Element Analyses
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