A Study on the Structural Behavior of Column-Slab Connections according to Confinement Effect using Finite Element Analysis

2016 ◽  
Vol 16 (6) ◽  
pp. 45-51
Author(s):  
Joo-Ha Lee ◽  
◽  
Byung-Soo Lee ◽  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Confinement Effect ◽  
Structural Behavior ◽  
Element Analysis

scholarly journals Modelling and Structural Analysis of Three-Dimensional Wing

2019 ◽  
Vol 9 (1) ◽  
pp. 6820-6828
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Analysis ◽  
Elastic Strain ◽  
Structural Investigation ◽  
Three Dimensional ◽  
Structural Behavior ◽  
Natural Rate ◽  
Modal Shape ◽  
Element Analysis

This paper attempts to discover the structural behavior of the wing imperiled to flowing loads through the voyage. The study uses a method in the form of finite element analysis of wing flexure distortion. As a first step, two wing models are established by captivating factual features, wing assembly, and plan principles into consideration. The gathering wing prototypical entails of tinny membrane, two poles, and multi-ribs. Two spars which consist of primary and secondary spars. NACA 23015 is chosen as the baseline aerofoil as this is identical alike to the tailored aerofoil being castoff in Airbus A320. Two rods mostly endure the twisting moment and trim strength, which is finished of titanium contaminant to ensure enough inflexibility. The covering and wing spars are made of aluminum amalgam to lessen the structural heaviness. Later, a static structural investigation is smeared, and the overall distortion, comparable elastic strain, and corresponding VonMises tension are obtained to analyze the mechanical behavior of the wing. Furthermore, modal investigation is being supported out to determine the natural rate of recurrence, as well as the modal shape of the three orders, which are acquired through the pre-stress modal analysis. The outcomes of the modal scrutiny aid engineers decrease excitation on the natural occurrences and avert the wing from the flurry. In view of the results obtained from the study, designers can emphasize consolidation and analysis the stress attentiveness range and huge distortion area. In conclusion, the recreation consequences indicate that the arrangement is possible and improves the information grade of the lifting surface.

Endplate Design and Analysis of Fuel Cells

2009 ◽  
Author(s):  
Tien-Tung Chung ◽  
Huan-Ruei Shiu ◽  
Chi-Chang Chen ◽  
Chin-Te Lin ◽  
Kuei-Han Chen ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fuel Cells ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Optimization Techniques ◽  
Structural Safety ◽  
Structural Behavior ◽  
Analysis Method ◽  
Element Analysis

Endplate design is important to the structural safety and the performance of the proton exchange membrane (PEM) fuel cells. In this paper, an organized design and analysis method is proposed to improve the endplate design. The 3D model for finite element analysis is constructed automatically by a CAD software with a parametric program through GUI interfaces. This model includes endplates, carbon plates, O-rings, gas diffusion layers (GDLs), and membrane electrode assemblies (MEAs). Then a series of finite element analysis are executed to analyze the structural behavior of PEM fuel cells. Structural boundary conditions and contact pairs are also applied into the meshed model. The positions of tie-bolts and parameters of endplate design are changed to improve the performance of PEM fuel cells through numerical optimization techniques. The structural behavior of key components is analyzed, including the compression ratio of GDLs, the sealing pressure of O-rings, and the structural safety of carbon plates. Results of analysis indicate that the shape of endplate affects the stack assembly pressure and contact behavior of PEM fuel cells. Proper shape of endplate can generate more uniform deformation of GDLs and avoid the leakage of fuels. With the changing design parameters of the endplate in the integrated design program, the optimum design that satisfies the design constraints and specifications can be found. According to the research conclusion, the proposed design and analysis method is helpful in determining the key dimensions for endplates or other components of PEM fuel cells.

A Study of Structural Behavior in Osteoporotic Trabecular Bone: Comparison Between Finite Element Analysis and Experiments With Fused Deposition Models

2002 ◽  
Author(s):  
Jan N. Eggert ◽  
Paul K. Wright
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Trabecular Bone ◽  
Physical Model ◽  
Fused Deposition Modeling ◽  
Human Condition ◽  
Structural Behavior ◽  
Element Analysis ◽  
Fused Deposition ◽  
Deposition Modeling

This project combines the topics of a) modern prototyping methods, b) studies on osteoporotic trabecular bone and c) engineering analysis using Finite Element Methods. The results are preliminary and serve as a basis for futures studies in bone mechanics. Specifically, the prototyping method of Fused Deposition Modeling was used to create a ‘scaled up’ model of a human trabecular bone. This type of bone was chosen because it is often afflicted by osteoporosis, a human condition that draws significant research attention. Thus the study described here was in part motivated by a larger research investigation into the structural behavior of degenerating human bones. The goal was to build and test a physical model and compare its behavior against a Finite Element Analysis (FEA) of the same structure. First, the model material was mechanically tested to determine Young’s modulus and Poisson’s ratio for input values to the FEA. An existing micro CT file was then adjusted for the first successful scaled bone model built on Fused Deposition Modeling. This physical model was equipped with strain gauges to determine localized strains, and successively tested in compression. (see Figure1.) The results were finally compared to the FEA, and an extensive error analysis was performed to relate physical analysis to computational assumptions.

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