scholarly journals Predicting Performance of Aluminum - Glass Composite Facade Systems Based on Mechanical Properties of the Connection

2017 ◽  
Author(s):  
Maciej Cwyl Warszawska ◽  
Andrzej Garbacz ◽  
Rafał Michalczyk ◽  
Natalia Grzegorzewska
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Stress Concentration ◽  
Mechanical Behavior ◽  
Numerical Study ◽  
Field Research ◽  
Glass Composite ◽  
Predicting Performance ◽  
Metal Framework ◽  
Aluminum Panels

In this paper, an extensive Finite-Element (FE) numerical study is carried out on a glass framing with point mechanical connectors. The models have been calibrated based on literature studies and field research. The simulations have been performed in order to assess the mechanical behavior of the examined glass-aluminum panels. In frame-support glass structures, such as curtain walls, where glass plates are mounted onto a metal framework, the composite behavior between glass and the supporting aluminum elements is usually a problem. It has been showed that an application of elastomer gaskets decreases the stress concentration at the interface between aluminum and glass while does not significantly change the working scheme of the profile. Based on the proposed models, the failure mechanism for wider set of geometrical configurations can be analyzed.

The Mechanical Performance Degradation of Steels Effected by Corrosion

2013 ◽  
Vol 774-776 ◽  
pp. 519-522
Author(s):  
Ming Qiang Lin ◽  
Feng Juan Dai ◽  
Shi Yan Song
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Stress Concentration ◽  
Mechanical Behavior ◽  
Tensile Properties ◽  
Finite Element Methods ◽  
Mechanical Performance ◽  
Performance Degradation ◽  
Mechanics Performance ◽  
Pit Depth

Corrosion of the steel affects seriously its mechanical performance. Based on the finite element methods, strength tensile properties of corroded steel were studied. Pit shapes and pit depths, pit locations, etc on the mechanical behavior of steel were studied mainly. Pit depth is major cause of produce rust steel mechanical performance degradation, because there is an obvious stress concentration phenomenon around pit, cause steel mechanics performance degraded significantly. Pit shapes and lengths may also be affected steel mechanical properties.

Experimental, numerical and parametric studies on stress concentration factors of T-joints under tension

2021 ◽  
pp. 136943322110499
Author(s):  
Feleb Matti ◽  
Fidelis Mashiri
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Numerical Study ◽  
Hot Spot ◽  
Joint Models ◽  
Element Analysis ◽  
T Joints ◽  
Concentration Factors ◽  
Stress Concentration Factors ◽  
Good Agreement

This paper investigates the behaviour of square hollow section (SHS) T-joints under static axial tension for the determination of stress concentration factors (SCFs) at the hot spot locations. Five empty and corresponding concrete-filled SHS-SHS T-joint connections were tested experimentally and numerically. The experimental investigation was carried out by attaching strain gauges onto the SHS-SHS T-joint specimens. The numerical study was then conducted by developing three-dimensional finite element (FE) T-joint models using ABAQUS finite element analysis software for capturing the distribution of the SCFs at the hot spot locations. The results showed that there is a good agreement between the experimental and numerical SCFs. A series of formulae for the prediction of SCF in concrete-filled SHS T-joints under tension were proposed, and good agreement was achieved between the maximum SCFs in SHS T-joints calculated from FE T-joint models and those from the predicted formulae.

scholarly journals Modeling of Size Effects in Bending of Perforated Cosserat Plates

2017 ◽  
Vol 2017 ◽  
pp. 1-19 ◽  
Author(s):  
Roman Kvasov ◽  
Lev Steinberg
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Numerical Study ◽  
The Finite Element Method ◽  
Classical Elasticity ◽  
Element Analysis ◽  
Plate Deformation ◽  
The Finite Element Analysis ◽  
Circular Holes ◽  
Different Shapes

This paper presents the numerical study of Cosserat elastic plate deformation based on the parametric theory of Cosserat plates, recently developed by the authors. The numerical results are obtained using the Finite Element Method used to solve the parametric system of 9 kinematic equations. We discuss the existence and uniqueness of the weak solution and the convergence of the proposed FEM. The Finite Element analysis of clamped Cosserat plates of different shapes under different loads is provided. We present the numerical validation of the proposed FEM by estimating the order of convergence, when comparing the main kinematic variables with an analytical solution. We also consider the numerical analysis of plates with circular holes. We show that the stress concentration factor around the hole is less than the classical value, and smaller holes exhibit less stress concentration as would be expected on the basis of the classical elasticity.

Modeling and Assessment of Porosity Effects on Mechanical Properties of Tissue Scaffolds

2006 ◽  
Author(s):  
W. M. Parks ◽  
Y. B. Guo ◽  
K. A. Woodbury
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Tissue Scaffolds ◽  
Materials Testing ◽  
Mechanical Behaviors ◽  
Fea Model ◽  
Pore Architecture ◽  
Static Mechanical ◽  
Scaffold Architecture

Mechanical properties of scaffolds are important for fabricating engineered tissues. However, localized mechanical properties of scaffold cannot be directly obtained from experiments. This study provides a solid modeling approach to simulate mechanical behaviors of alginate scaffolds with different porosity. A scaffold micro-domain has been modeled as made of sub-units, arranged in a sphere-based pore architecture. An expression to calculate porosity was also derived for the scaffold architecture. Finite element simulations of compressing alginate scaffolds were performed to evaluate the effect of porosity on quasi-static mechanical behavior. The developed FEA model is capable of computing scaffold strength and predicting localized mechanical behavior without destructive materials testing.

Analysis Research of Frame-Supported Transfer Beam with Opening Using Finite Element

2010 ◽  
Vol 163-167 ◽  
pp. 1620-1625
Author(s):  
Ji Yao ◽  
Ze Li ◽  
Ming Jun Peng
Keyword(s):  
Finite Element ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Mechanical Behavior ◽  
Local Stress ◽  
Weak Spot ◽  
High Rise ◽  
Finite Element Software ◽  
Weak Part ◽  
Working Performance

This paper presents research on mechanical behavior of frame-supported transfer beams with or without opening in the high-rise buildings using commercial finite element software ANSYS. The result indicated that the hole only impacted the local stress distribution of transfer beam. From the overall view, stress distribution of frame-supported transfer beam with or without opening was almost same. But hole undermined the whole working performance of transfer beam and reduced transfer beam bearing capacity. Influence of the hole as the result of the stress concentration on transfer beam maked the spot became weak part. This weak spot needed to be strengthened in the practical struction members.

scholarly journals A Numerical Study on the Control of Horizontal Cracking at the Ends of BS22 Hollow-type PC-girders Utilizing Midas FEA

2021 ◽  
Vol 1996 (1) ◽  
pp. 012011
Author(s):  
Abdul Khaliq Karimi ◽  
Bashir Ahmad Aasim ◽  
Jun Tomiyama
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Concentration ◽  
Numerical Study ◽  
Crack Size ◽  
Analysis Software ◽  
Principal Stresses ◽  
Element Analysis ◽  
Crack Penetration ◽  
Strand Debonding

Abstract When the prestressing forces transfer from PC-strands to concrete, a region of stress concentration develops at the ends of pretensioned girders, which often results in horizontal cracking during or just after the detensioning process. In this study, a hollow PC-girder was modeled utilizing a Finite Element Analysis software Midas FEA to identify the horizontal cracking locations in terms of the principal stresses at the end-zone of the hollow PC-girder. Strand-debonding and placing end-zone reinforcements were hired in this work by introducing four cases. The only strand-debonding method could not prevent horizontal end crack penetration. Though the end-zone reinforcements were placed alongside the strand-debonding, this combination could reduce principal stresses to a level that could bring the crack size to a negligible range.

Influence of Calcified Cartilage Zone Permeability in Mechanical Behavior of Articular Cartilage: A Finite Element Study

2009 ◽  
Author(s):  
Ali Vahdati ◽  
Diane R. Wagner
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Articular Cartilage ◽  
Mechanical Behavior ◽  
Independent Study ◽  
Cartilage Tissue ◽  
Fe Model ◽  
Mechanical State ◽  
Calcified Cartilage ◽  
Important Player

Articular cartilage (AC) disease and especially osteoarthrithis (OA) are debilitating conditions that are associated with huge social and economic burdens. To understand the factors involved in initiation and progression of OA, the mechanical state of the cartilage tissue must be first understood [1]. Biphasic and triphasic models developed by Mow and coworkers relate AC structure with its mechanical behavior and provided researchers with valuable models for AC biomechanics [2, 3]. Although much is known about AC and its mechanical properties, the zone of calcified cartilage (ZCC) has been sparsely studied. ZCC is very thin and highly interdigitated with subchondral bone (SB) which makes it very difficult to isolate for independent study [4]. It is well known that SB plays an important role in both initiation and/or progression of OA [5], thus ZCC may also be an important player in the pathology of the disease [6]. A few studies have investigated mechanical properties of ZCC, but conflicting results have been published on ZCC permeability. Although ZCC has been mainly assumed to be impermeable [7], recently Hwang et al. [8] suggested that ZCC may have even higher permeability than cartilage itself. We studied the effect of ZCC permeability on mechanical behavior of AC using a finite element (FE) model.

Experimental and Numerical Analysis of a Pristine and a Nano-Modified Thermoplastic Adhesive

2018 ◽  
Author(s):  
Carlo Boursier Niutta ◽  
Raffaele Ciardiello ◽  
Giovanni Belingardi ◽  
Alessandro Scattina
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Numerical Analysis ◽  
Mechanical Behavior ◽  
Numerical Models ◽  
Surface Preparation ◽  
Experimental Results ◽  
Element Analysis ◽  
Piping Systems ◽  
Set Up

In this work, the mechanical properties of two different adhesives compositions have been investigated both experimentally and numerically. The studied thermoplastic adhesives are Hot-Melt Adhesive (HMA). In particular, a pristine and a nanomodified adhesive with 10% in weight of iron oxide have been considered. The adhesives have been subjected to a series of single lap joint (SLJ) tests using adherends made of polypropylene copolymer. As it is well-known, the structural-mechanical behavior of adhesive joints is mostly influenced by the bonding process: thickness of adhesive as well as its application procedures and the surface preparation of adherends are among the most influencing factors. In addition, the mechanical behavior of SLJ test is particularly influenced by the correct alignment of adherends and applied load. These aspects have been investigated, analyzing the experimental results. Moreover, the experimental results have been used to develop a numerical model of the two adhesives. The numerical analysis has been carried out using the commercial software LS-DYNA. Transient nonlinear finite element analysis has been performed to simulate the mechanical behavior of the thermoplastic adhesives. In particular, the cohesive formulations of the elements have been taken into consideration after a careful literature review. In order to set-up and to validate the mechanical properties of the adhesives, the experimental SLJ tests have been simulated. The developed finite element models enable to investigate more complex joint structures where these types of adhesives are used, such as plastic piping systems and automotive applications. Further, the numerical models allow to investigate with higher accuracy and lower time different aspects such as manufacturing and non-linear effects.

Research on the Influence of the Stiffening Plates on the Stress of Hold Hoop of Bent Cap

2019 ◽  
Vol 815 ◽  
pp. 223-228
Author(s):  
Qin Tian ◽  
Cheng Hao Hang ◽  
Yun Peng Zou ◽  
Zi Xin Wan
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Stress Concentration ◽  
Structural Parameters ◽  
Great Influence ◽  
Finite Element Models ◽  
Finite Element Software ◽  
Bridge Steel ◽  
Calculation Results ◽  
Shell Finite Element

In order to improve the mechanical behaviour of bridge steel hoops, the plate shell finite element models of several steel hoops were established by using the general finite element software ABAQUS. Through changing the structural parameters of the stiffening plates, the influence of the stiffening plates on the mechanical properties of the steel hoops was explored. The calculation results show that the stress distribution at both ends of the steel hoop is uneven and there is a phenomenon of stress concentration. The spacing of stiffening plates has great influence on the mechanical properties of steel hoop. Some measures to improve the mechanical properties of steel hoop are given.

scholarly journals A Multiscale Simulation Method and Its Application to Determine the Mechanical Behavior of Heterogeneous Geomaterials

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Shengwei Li ◽  
Heping Xie ◽  
Ru Zhang ◽  
Mingzhong Gao ◽  
Zetian Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Molecular Simulation ◽  
Heterogeneous Material ◽  
Simulation Method ◽  
Multiscale Simulation ◽  
Mechanical Behaviors ◽  
Finite Element Numerical Simulation

To study the micro/mesomechanical behaviors of heterogeneous geomaterials, a multiscale simulation method that combines molecular simulation at the microscale, a mesoscale analysis of polished slices, and finite element numerical simulation is proposed. By processing the mesostructure images obtained from analyzing the polished slices of heterogeneous geomaterials and mapping them onto finite element meshes, a numerical model that more accurately reflects the mesostructures of heterogeneous geomaterials was established by combining the results with the microscale mechanical properties of geomaterials obtained from the molecular simulation. This model was then used to analyze the mechanical behaviors of heterogeneous materials. Because kernstone is a typical heterogeneous material that comprises many types of mineral crystals, it was used for the micro/mesoscale mechanical behavior analysis in this paper using the proposed method. The results suggest that the proposed method can be used to accurately and effectively study the mechanical behaviors of heterogeneous geomaterials at the micro/mesoscales.

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