Finite element reliability analysis

Sudret B., Defaux G., and Pendola M. 2005. Ilme-invariant finite element reliability analysis application to the durability of cooling towers. Structural Safety, 27,93-112. 

New hybrid method for finite element reliability analysis... 

Kala, Z. 2012. Geometrically non-linear finite element reliability analysis of steel plane frames with initial imperfections. Journal of Civil Engineering and Management 18(1) 81-90. 

In many industrial halls, conduction inro the ground is a major factor for heat loss. Therefore, an adequate modeling of the floor slab and the underlying, thermally active, soil is very crucial for reliable simulation resuirs. In this case, the soil model in the TRNSYS model was established using results from an additionally performed finite-element program analysis. 

The estimated ultimate load of pile foundation is an important project and involves a number of challenges from the geotechnical and structural safety viewpoint. The strength reduction method of pile foundation and estimation criterion of ultimate load is studied based on nonlinear finite element and cusp catastrophe theory. The finite element limit analysis of pile is performed using the single reduction factor and two reduction factors of strength reduction method and the criterion of the cusp catastrophe curve method, and has been shown to be a reliable and objective method for estimating the ultimate load of pile. 

Tan, X.H. Wang, J.G. Liu, X.R. et al. 2007. Finite element reliability computation and sensitivity analysis of slope stability. Chinese Journal of Rock Mechanics and Engineering 26(1) 115-122. 

PP bead foams were subjected to oblique impacts, in which the material was compressed and sheared. This strain combination could occur when a cycle helmet hit a road surface. The results were compared with simple shear tests at low strain rates and to uniaxial compressive tests at impact strain rates. The observed shear hardening was greatest when there was no imposed density increase and practically zero when the angle of impact was less than 15 degrees. The shear hardening appeared to be a unique function of the main tensile extension ratio and was a polymer contribution, whereas the volumetric hardening was due to the isothermal compression of the cell gas. Foam material models for finite element analysis needed to be reformulated to consider the physics of the hardening mechanisms, so their predictions were reliable for foam impacts in which shear occurred. 16 refs. 

The application of numerical modeling in water resource and waste disposal management is constantly increasing. An important factor is the requirement to predict environmental impact. As the processes are usually very complex, the substantial interest is directed towards diverse process factors, possibly interacting with each other. Unfortunately, a separate and reliable analysis of a coupled multi-field problem requires well-founded assumptions and restrictions of the problem itself. Consequently, the analysis of coupled processes is a challenging application of the finite element method. 

After obtaining the mechanical properties, numerical analysis by Means of the Finite Element Method (FEM) with explicit integration of dynamic equilibrium equation was carried out. These numerical techniques allow for obtaining reliable results of impacts against polypropylene sheets. Virtual simulations allow for obtaining the maximum displacements in the sheets, the kinetic energy reduction of the semisphere and the energy absorbed by the sheet in the load cases analyzed. 

Although theoretical analytical methods such as finite element analysis offer one a chance to solve complex stress problems, there are many causes of strain in parts that cannot be reliably tested by these expensive computer-oriented techniques. For instance, strains due to the assembly of components and those caused during processing are extremely difficult problems to analyze without physically testing the part. 

In response to the challenge, the current paper also aims to correlate the 3D microstmctures from FIB/SEM sectioning, with the reliable elastic moduh estimated by spherical nanoindentation and analysis of the partially sintered porous LSCF cathode films of varying microstmctures. The elastic moduh of the actual microstmctures are then computed using finite element modehng (FEM), and compared with the measured ones. 

Kralik,J. 2009b. Reliability Analysis of Structures Using Stochastic Finite Element Method, Habilitation work. Edition STU Bratislava, 2009, pp. 138. 

Finally, to set the mind of the winder engineer carrying out the upgrade or refurbishment at ease and to convince the operator that the upgrade or refurbishment will provide a reliable extension of the winder s useful life, a full Finite Element Analysis (FEA) of the drum is performed so that the location and magnitude of the stresses in the drums imposed by the future duty are determined and recorded. (See Figure 7.)... 

Using the second finite element model, the residual stress state in a detailed model of the ceramic-metal braze joint was obtained. The results of this analysis were used to superimpose residual thermal deformations with the service torque loads on the joint for strength and reliability predictions. 

The development of modeling techniques to predict the fast fracture reliability of structural ceramics involves the implementation of finite element models to statistical and fracture mechanics analysis such as the ones found in CARES. This postprocessor developed by NASA-Lewis was recently available for ANSVS and is being evaluated under this contract. Updated versions of the program will be received shortly. Finite element MOR and tension models have been generated and will be compared with experimental results. Final results will be available in later reports. 

The response of low-rise structures to earthquake loading has been extensively studied by employing advanced finite element analyses (FEA), quasi-static experiments, pseudo-dynamic (PSD) simulation of structural components and structural systems. It has also been investigated through shake table tests on models at different scales. On the contrary, reliable estimation of the structural capacity of complex high-rise reinforced concrete (RC) or composite systems under extreme loads has been hindered by the lack of suitable analysis software, computational capacity for refined model analysis, and the impracticality of experimental testing. 

There is a dearth of accurate, efficient and reliable analytical approaches for the inelastic static and dynamic analyses of complex reinforced concrete and composite high-rise buildings under extreme loads taking into account shear-flexure-axial interaction, crack propagation and other detailed features of concrete response. In this study, a new approach termed multi-resolution distributed finite element analysis (MDFEA) is proposed and used to analyze a reference RC high-rise building with a dual core... 

The treatment of uncertainties requires the use of probabilistic methods, estimating the probability of exceeding response targets for the different performance requirements, for example, on an annual basis. The dynamic structural responses are highly nonlinear, and their time history must be found by numerical (e.g., finite elements) analysis for the duration of the earthquake. In a thorough analysis, the nonlinearity of the response is further increased when the interactions between the structure and the foundations are included. It is not possible to establish an explicit relationship between the intervening variables and the dynamic responses, and results can only be obtained in a discrete manner, given specific values of the structural variables and a particular earthquake record. Reliability calculations depend on simulations... 

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