A layered shell element for the thermal analysis of plates exposed to non-uniform heating

2013 ◽  
pp. 197-198
Keyword(s):  
Thermal Analysis ◽  
Shell Element ◽  
Uniform Heating ◽  
Layered Shell

scholarly journals Adaptive Powell’s Identification of Elastic Constants of Composite Glass Girder with Layered Shell Element Theory

Mechanika ◽  
2020 ◽  
Vol 26 (5) ◽  
pp. 390-397
Author(s):  
Jian ZHANG ◽  
Yanlong JIANG ◽  
Wei SUN ◽  
Hua LIU ◽  
Guodong LI ◽  
...  
Keyword(s):  
Objective Function ◽  
Elastic Constants ◽  
Optimization Theory ◽  
Shell Element ◽  
Layered Shell ◽  
Box Girder ◽  
Computation Efficiency ◽  
Interpolation Search ◽  
Composite Glass ◽  
Element Theory

For the composite glass box girder, the generalized Bayesian objective function of elastic constants of the structure was derived based on layered shell element theory. Mechanical performances of the composite glass box girder were solved by layered shell element method. Combined with quadratic parabolic interpolation search scheme of optimized step length, the adaptive Powell’s optimization theory was taken to complete the stochastic identification of elastic constants of composite glass box girder. Then the adaptive Powell’s identification steps of elastic constants of the structure were presented in detail and the adaptive Powell’s identification procedure was accomplished. From some classic examples, it is finally achieved that the adaptive Powell’s identification of elastic constants of composite glass box girder has perfect convergence and numerical stability, which testifies that the adaptive Powell’s identification theory of elastic constants of composite glass box girder is correct and reliable. The stochastic characteristics of systematic responses and elastic constants are well deliberated in generalized Bayesian objective function. And in iterative processes, the adaptive Powell’s identification is irrelevant with the complicated partial differentiation of the systematic responses from the layered shell element model to the elastic constants, which proves high computation efficiency.

Layered-Shell Element Method of Calculating the Multi-Ribbed Composite Slab’s Elastic Lateral Stiffness

2011 ◽  
Vol 243-249 ◽  
pp. 1346-1350
Author(s):  
Peng Chang ◽  
Yao Luo
Keyword(s):  
Elastic Modulus ◽  
Influence Factor ◽  
Shell Element ◽  
Lateral Stiffness ◽  
Layered Shell ◽  
Element Analysis ◽  
Factors Affecting ◽  
Modeling Process ◽  
The Finite Element Analysis ◽  
Element Method

A new method for calculating the elastic lateral stiffness of the multi-ribbed composite slab by ANSYS—the layered-shell element method is introduced in this paper. In the modeling process, there are two ways for establishing the model using element SOLID46: the first refers to regarding the slab as a whole to make arranged layers. While the second type suggests that making arranged layers in each part already separated according to the materials. Especially when there are reasonable hypothesis, the analysis results can guarantee certain precision. By comparison among the two models and the experimental results, no errors with each other have exceeded 5%. The whole model is used for the numerical simulation in view of its briefness. Several factors affecting elastic lateral stiffness are considered, mainly including elastic modulus of the concrete, elastic modulus of the brick, and number of the ribbed-column. From the calculating results, conclusion can be deduced that all of these factors affecting the slab’s stiffness significantly. Along with the factors’ rising, the elastic lateral stiffness of the wall grows up. Basically, the influence factor and the elastic lateral stiffness of the slab present to be linear relationship. It is also meaningful to see that the elastic modulus of the brick plays a very important part in the elastic lateral stiffness of the wall. When compared to the SOLID65 and LINK8 used for the slab’s modeling before, the layered-shell element method is simple in principle, and distinct in conception. Above all, because only one type of element in the finite element analysis is used, it will cost less time when used on building a model of integrated architectural construction.

Thermal analysis of FRP chimneys using consistent laminated shell element

2000 ◽  
Vol 37 (1) ◽  
pp. 57-76 ◽  
Author(s):  
A.A El Damatty ◽  
A.S Awad ◽  
B.J Vickery
Keyword(s):  
Thermal Analysis ◽  
Shell Element ◽  
Laminated Shell

Compressive Response of Thermoplastic Composites by Layered Shell Elements

1992 ◽  
Author(s):  
Hassan Mahfuz ◽  
Cynthia R. Ingram ◽  
Shaik Jeelani
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Shell Element ◽  
Material Behavior ◽  
Thermoplastic Composites ◽  
Shear Stresses ◽  
Layered Shell ◽  
Element Analysis ◽  
Shell Elements ◽  
Compressive Response

Abstract Thick Laminates of thermoplastic Composites (APC-2) are modeled with isoparametric layered shell elements to predict the responses of the laminate at various temperatures under compressive loading. A large displacement finite element analysis is performed by considering the geometric non-linearities in the composite structure. Multiple load steps with linear material behavior are used to model the load-displacement characteristics found in a previous experimental study. A detailed description of the layered shell element along with its formulations is presented to highlight the limitations and scope of this element in composite structural analysis. Compressive response in respect of displacements, normal stresses, shear stresses and interlaminar shear stresses under three different temperatures is presented. Laminate response along its length as well as through the thickness is also presented to analyze and understand the failure mechanisms under such loading. Experimental data from a previous study are compared with the current result to validate the finite element analysis.

scholarly journals Numerical Simulation and Parametric Analysis of Precast Concrete Beam-Slab Assembly Based on Layered Shell Elements

Buildings ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 7
Author(s):  
De-Cheng Feng ◽  
Cheng-Zhuo Xiong ◽  
Emanuele Brunesi ◽  
Fulvio Parisi ◽  
Gang Wu
Keyword(s):  
Numerical Simulation ◽  
Precast Concrete ◽  
Shell Element ◽  
Simulation Method ◽  
Layered Shell ◽  
Shell Elements ◽  
Slab Width ◽  
Numerical Studies ◽  
Hysteretic Performance ◽  
Energy Dissipation Capacity

Precast concrete (PC) plays an important role in the industrialization processes of buildings, so it is critical to study the seismic performance of such structures. Several experimental and numerical studies have been conducted to investigate the behavior of PC beam-to-column connections. However, most of the previous studies neglect the contribution of slabs. In light of this, this paper presents a numerical simulation method for dry connected beam-slab assemblies based on the layered shell element available in OpenSees. The beams were modeled with fiber elements, while the slabs were modeled with layered shell elements. The developed model was validated by simulating a typical beam-slab assembly test, with the characteristics of hysteretic performance found to be well reflected by the model. Moreover, a parametric study was performed to quantify the influence of slab parameters. The results showed that the thickness of the slab had a significant effect on the hysteretic performance of the specimen and that the influence of the slab width was obviously reduced after it exceeded a certain limit. Besides, the effect of the reinforcement ratio on stiffness and loadbearing capacity was not obvious and was accompanied by a slight positive correlation with the energy dissipation capacity.

scholarly journals Multi-Pass Welding Distortion Analysis Using Layered Shell Elements Based on Inherent Strain

2021 ◽  
Vol 9 (6) ◽  
pp. 632
Author(s):  
Jaemin Lee ◽  
Diego Perrera ◽  
Hyun Chung
Keyword(s):  
Equivalent Plastic Strain ◽  
Mesh Size ◽  
Shell Element ◽  
Welding Distortion ◽  
Layer By Layer ◽  
Layered Shell ◽  
Shell Elements ◽  
Thermal Expansion Coefficients ◽  
Input Variables ◽  
Haz Width

In this article, a layered shell element-based, elastic finite element method for predicting welding distortion in multi-pass welding is developed. The welding distortion generated in each pass can be predicted by employing layer-by-layer equivalent plastic strains as thermal expansion coefficients and using the heat-affected zone (HAZ) width as the mesh size. The final distortion can be expressed as the sum of the distortions for each pass. This study focuses on extraction of the equivalent plastic strain and HAZ width through 3D thermal elastic plastic analysis (TEPA) for each pass. The input variables extracted from each pass can be converted and added to simulate the final distortion of the multi-pass welding. A 10 mm thick, multi-pass butt-welded joint, subjected to three passes, is simulated via the proposed method. The predicted welding distortion is compared with the 3D TEPA results and the measured experimental data. The outcome indicates that good agreement can be obtained.

Conjugate Gradient Back Analysis of Mechanical Parameters of Box Structure Based on Layered Shell Element

2011 ◽  
Vol 4 (8) ◽  
pp. 3155-3160
Author(s):  
Jian Zhang ◽  
Wengai Lan ◽  
Chuwei Zhou ◽  
Ting Yang ◽  
Jianfeng Huang
Keyword(s):  
Conjugate Gradient ◽  
Back Analysis ◽  
Shell Element ◽  
Mechanical Parameters ◽  
Layered Shell ◽  
Box Structure
Sign in / Sign up

Export Citation Format

Share Document