Numerical Analysis of the Failure Behavior of a C50/60 Brazilian Disc Test Specimen with a Central Notch

2018 ◽  
Vol 774 ◽  
pp. 570-575 ◽  
Author(s):  
Petr Miarka ◽  
Stanislav Seitl ◽  
Wouter de Corte
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Fracture Resistance ◽  
Test Specimen ◽  
Failure Behavior ◽  
Brazilian Disc ◽  
Finite Element Software ◽  
Brazilian Disc Test ◽  
Analytical Formulas ◽  
C 50

The Brazilian disc test with central notch is widely used to evaluate the fracture resistance of rocks and concrete by analytical formulas. However, studies of the post peak behavior are limited. In this contribution the post peak behavior of a C 50/60 concrete was studied using the finite element software Abaqus. The numerical results were compared to experimental data provided by BUT.

Stress Analysis of Non-Conventional Composite Pipes: An Experimental and Numerical Approach

2009 ◽  
Author(s):  
Muhammad A. Wahab ◽  
Prashanth Ramachandran ◽  
Su-Seng Pang ◽  
Randy A. Jones
Keyword(s):  
Finite Element ◽  
Internal Pressure ◽  
Failure Modes ◽  
Bending Strength ◽  
Numerical Study ◽  
Numerical Approach ◽  
Failure Behavior ◽  
Finite Element Software ◽  
Bending Load ◽  
Composite Pipes

This paper discusses an experimental and numerical study to investigate the failure behavior of non-conventional cross-sectioned fiber reinforced composite pipes filled with glass beads subjected to internal pressure and bending loads. An adaptive filament winder for non-conventional pipes was exclusively designed to fabricate the samples used in the experiments. Experiments were conducted on triangular and rectangular cross-sectioned samples as per ASTM standards to find the internal burst pressure, bending strength, and failure modes of the pipes. Numerical analysis for the pipe loading process has been developed based on the finite element method for a linear orthotropic problem for composite pipes. The finite element software ANSYS was used to build the model and predict the stresses imposed on the pipes. The relationships between the applied internal pressure and peak hoop stress, bending load, and bending strength with reference to the fillet radius were determined; and generally a good correlation was found between the experimental and numerical results.

Numerical Analysis of Soil Pressure inside the Sunken Large Diameter Cylindrical Structure Based on ABAQUS

2013 ◽  
Vol 353-356 ◽  
pp. 392-397 ◽  
Author(s):  
Jin Song Gui ◽  
Bo Zhang ◽  
Zhi Qi Gao ◽  
Yu Fu
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Large Scale ◽  
Large Diameter ◽  
Earth Pressure ◽  
Pressure Change ◽  
Soil Pressure ◽  
Cylindrical Structure ◽  
Finite Element Software ◽  
Pressure Calculation

The filling earth pressure calculation inside the Sunken Large Diameter Cylindrical Structure is very complex. This paper used large-scale finite element software ABAQUS to establish numerical model, and validated it by the experimental data, then analyze the main cause of earth pressure change inside the cylinder.

Flexural Analysis of Polyurethane Foam and Sandwich Composite Foam via Experimental and Finite Element CMethods

2013 ◽  
Vol 795 ◽  
pp. 526-529 ◽  
Author(s):  
Z. Firuz ◽  
Ahmad Sahrim ◽  
Rozaidi Rasid ◽  
S.A. Syed Nuzul Fadzli
Keyword(s):  
Finite Element ◽  
Polyurethane Foam ◽  
Batch Process ◽  
Sandwich Composite ◽  
Failure Behavior ◽  
Flexural Stress ◽  
Polyester Polyol ◽  
Composite Foam ◽  
Finite Element Software ◽  
Pu Foam

Polyurethane (PU)/montmorillonite (MMT) composite foam were synthesized with reaction of diisocyanate with polyester polyol by a batch process. In this research, water was used as the blowing agent with TEGOSTAB B8407 and TEGOAMIN PMDETA as the surfactant and catalyst, respectively. Clay was used as filler for composite PU foam with the percentages varied from 0 wt% to 5 wt%. Polyurethane foam (Al-PU) sandwich composite was prepared using hand-lay up method where Al sheet was stacked onto PU foam using adhesive. The samples were characterized using flexural test analysis. Observations showed that PU foam has better failure deformation with flexural extension increased up to 9.44 mm. However, flexural stress and optimum load for sandwich composite are up to 3.63MPa and 410.78N respectively. Furthermore, Al sheet act as ductile skin to PU foam and prevent samples from rupture rapidly or avoiding the existence of brittle fracture. Modeling of composite using finite element software shows the ductile-like failure behavior in sandwich composite Al-PU foam even though the core itself is a rigid brittle foam.

Numerical Simulation Study on Quasi-Static Fracture Problem of Implicit Methods

2012 ◽  
Vol 170-173 ◽  
pp. 3683-3686
Author(s):  
Qi Ming Yu ◽  
Yu Yang Chen ◽  
Zhi Zhang
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Simulation Study ◽  
Implicit Method ◽  
Implicit Methods ◽  
Finite Element Software ◽  
Static Fracture ◽  
Characteristic Values

Implicit method is one of the most important ways of Finite element method. In this paper, finite element software are used for the CTOD test specimens to simulate the characteristic values, then compared with the experimental data to draw the appropriate conclusions.

A Test Specimen for Determining the Fracture Resistance of Bimaterial Interfaces

1989 ◽  
Vol 56 (1) ◽  
pp. 77-82 ◽  
Author(s):  
P. G. Charalambides ◽  
J. Lund ◽  
A. G. Evans ◽  
R. M. McMeeking
Keyword(s):  
Finite Element ◽  
Crack Length ◽  
Elastic Properties ◽  
Fracture Resistance ◽  
Test Specimen ◽  
Model System ◽  
Finite Element Approach ◽  
Center Point ◽  
Bimaterial Interfaces ◽  
Element Approach

A test specimen capable of measuring the fracture resistance of bimaterial interfaces has been devised. A finite element approach has been used to characterize trends in the stress intensities and center point displacement with specimen dimensions, elastic properties, and crack length. The utility of the specimen has been demonstrated by conducting experiments on the model system, Al/PMMA.

Numerical Mechanical Analysis of Filled Rubber under Different Deformation States Based on a New Hyperelastic Constitutive Model

2021 ◽  
Vol 1032 ◽  
pp. 15-22
Author(s):  
Xin Tao Fu ◽  
Ze Peng Wang ◽  
Lian Xiang Ma
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Constitutive Model ◽  
Pure Shear ◽  
Mechanical Analysis ◽  
Uniaxial Tensile ◽  
Material Parameters ◽  
Finite Element Software ◽  
Filled Rubber ◽  
Deformation State

The accuracy of the rubber constitutive model characterizing experiment data has a crucial influence on the mechanical analysis of rubber structures. In this paper, a new improved hyperelastic constitutive model is proposed, and the model is derived into the stress-strain forms of uniaxial tension, equibiaxial tension and pure shear. Based on the experimental data of filled rubber, the material parameters of each deformation state are obtained by using the newly proposed rubber hyperelastic constitutive model, and the uniaxial tensile (UT), Equibiaxial tension (ET) and Pure shear (PS) specimens are simulated and calculated in the finite element software. the stress state of each finite element specimen is analyzed and the obtained simulation data are compared with the experimental data. It is found that the new model can accurately characterize the hyperelastic mechanical properties of the experimental specimens in different deformation states. At the same time, the reasons for the deviation from the experimental data in the process of plane tensile simulation are analyzed and explained comprehensively. The reliability and accuracy of the classical rubber constitutive relations of polynomial models and eight-chain model are studied. the results show that different hyperelastic models have different ability to describe the hyperelastic behavior in different deformation states. the hyperelastic constitutive model proposed in this paper can be easily embedded into finite element software and has the advantages of accurate results, few material parameters and simple testing.

The Contrast of Concrete Brazilian and Flattened Brazilian Disc Specimen under Quasi Static Diametral Compression Tests

2014 ◽  
Vol 507 ◽  
pp. 263-268
Author(s):  
Pei Liang ◽  
Jun Lin Tao
Keyword(s):  
Mechanical Properties ◽  
Test Specimen ◽  
Test Method ◽  
Compression Tests ◽  
Brazilian Disc ◽  
Disc Specimen ◽  
Diametral Compression ◽  
Brazilian Disc Test ◽  
Force Curves ◽  
Rock Mechanical Properties

Reference the test method of the rock mechanical properties, through the concrete Brazilian and flattened Brazilian disc specimen under quasi static diametral compression tests and compared, research shows that flattened Brazilian disc specimens split eventually destroy the formation more than one cracks, on both sides along the platform has large cracks, even cracks in some specimens from the platform to the next platform throughout the ipsilateral endpoint, and complete Brazilian disc does not appear this phenomenon. Complete Brazilian disc specimens and flattened Brazilian disc test specimen loading force curves form remains the same, but flattened Brazilian disc specimens eventually reach the extreme loading force has a higher value than the first extreme loading force.

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