scholarly journals Failure Analysis of Graphite Epoxy Composite Plate Under Transverse Sinusoidal Load

2018 ◽  
Vol 7 (3.11) ◽  
pp. 62
Author(s):  
Nor Fazli Adull Manan ◽  
Mohammad Firdaus Mohd Jam ◽  
Shishir Kumar Sahu ◽  
Jamaluddin Mahmud
Keyword(s):  
Composite Material ◽  
Failure Analysis ◽  
Failure Criteria ◽  
Element Analysis ◽  
Specific Strength ◽  
Aspect Ratios ◽  
Marine Industry ◽  
The Finite Element Analysis ◽  
Sinusoidal Load ◽  
Failure Loads

Composite material become interest on various applications in wide industry globally. The selection of composite material due to its versatile properties for instance high specific strength. Besides, the properties of composite material also tailorable for various application including automotive, aerospace and marine industry. The objective of this study is to perform the failure analysis of composite material under transverse sinusoidal load. Both failure criteria, Maximum Stress and Tsai-Wu Failure Criteria that provided in ANSYS used to carry out the analysis. Various aspect ratios will be used which are 5, 10, 20, 50 and 100 to perform the analysis with different thickness of laminate. Next, the boundary condition of the plate was set to simply and clamp supported. The finite element analysis of graphite/epoxy laminate with layup of (0/90/90/0) performed to determine the failure loads (First Ply Failure, FPF and Last Ply Failure, LPF loads). The un-normalized load obtained from the analysis is converted to normalized load using equation given. Finally, normalized load is plotted against aspect ratio for both failure criteria and boundary conditions.  

Failure Criteria for Brittle Notched Specimens

2022 ◽  
Author(s):  
Young W. Kwon ◽  
Carlos Diaz-Colon ◽  
Stanley Defisher
Keyword(s):  
Elliptical Hole ◽  
Failure Criteria ◽  
Homogeneous Material ◽  
Carbon Fiber Composites ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Theoretical Predictions ◽  
Circular Holes ◽  
Failure Loads ◽  
Stress Models

Abstract Recently, new failure criteria were proposed for brittle materials to predict their failure loads regardless of the shapes of a notch or a crack in the material. This paper is to further evaluate the failure criteria for different shapes of notches and different materials. A circular hole, elliptical hole or crack-like slit with a different angle with respect to the loading direction was considered. Double circular holes were also studied. The materials studied were an isotropic material like polymethyl methacrylate (PMMA) as well as laminated carbon fiber composites. Both cross-ply and quasi-isotropic layup orientations were examined. The lamination theory was used for the composite materials so that they can be modelled as an anisotropic and homogeneous material. The test results were compared to the theoretical predictions using the finite element analysis with 2-D plane stress models. Both theoretical failure stresses agreed well with the experimental data for the materials and notch geometries studied herein.

Progressive failure analysis of fiber-reinforced laminated composites containing a hole

2017 ◽  
Vol 27 (7) ◽  
pp. 963-978 ◽  
Author(s):  
Hadi Bakhshan ◽  
Ali Afrouzian ◽  
Hamed Ahmadi ◽  
Mehrnoosh Taghavimehr
Keyword(s):  
Failure Analysis ◽  
Failure Modes ◽  
Progressive Failure ◽  
Composite Plates ◽  
Failure Criteria ◽  
Element Analysis ◽  
Progressive Failure Analysis ◽  
Numerical Predictions ◽  
Open Hole ◽  
Failure Loads

The present work aims to obtain failure loads for open-hole unidirectional composite plates under tensile loading. For this purpose, a user-defined material model in the finite element analysis package, ABAQUS, was developed to predict the failure load of the open-hole composite laminates using progressive failure analysis. Hashin and modified Yamanda-Sun’s failure criteria with complete and Camanho’s material degradation model are studied. In order to achieve the most accurate predictions, the influence of failure criteria and property degradation rules are investigated and failure loads and failure modes of the composites are compared with the same experimental test results from literature. A good agreement between experimental results and numerical predictions was observed.

Stress Distribution Behavior of Spherical Plain Bearing Fabricated by TiAl-Based Composite Materials Based on the Finite Element Analysis

2014 ◽  
Vol 1061-1062 ◽  
pp. 649-652
Author(s):  
Jing Wang ◽  
Li Ying Yang ◽  
Shou Ren Wang ◽  
Guang Ji Xue ◽  
Chang Xiu Zhou
Keyword(s):  
Finite Element ◽  
Composite Material ◽  
Composite Materials ◽  
Bearing Steel ◽  
Plain Bearing ◽  
Element Analysis ◽  
Specific Strength ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Spherical Plain Bearing

Spherical plain bearing is a sliding bearing have a spherical contact surface,it can bear larger load and automatically adjusted to the self-alignin. TiAl-based composite material is a material that be used to lightweight spherical plain bearing. The Simulation used the finite element software Ansys for the bearing’s static analysis.The material of outer ring using normal bearing steel, one group used the TiAl-based composite materials as the material of the inner ring, Another group the inner ring material is bearing steel 9Cr18. The law of the stress and strain produced by the two groups is consistent,the deformation of the composite materials is bigger under the same load, its elasticity modulus and density is smaller compared to the ordinary bearing steel,the composite material has the advantages of high specific strength especially in the occasions have strict requirements of the bearing weight.

Progressive Failure Analysis of Unidirectional-Fabric Laminated Composite Joints under Pin-Loading

2007 ◽  
Vol 334-335 ◽  
pp. 1-4
Author(s):  
Jin Hwe Kweon ◽  
Hee Jin Son ◽  
Ji Young Choi ◽  
So Young Shin ◽  
Jin Ho Choi ◽  
...  
Keyword(s):  
Finite Element ◽  
Failure Analysis ◽  
Progressive Failure ◽  
Laminated Composite ◽  
Shell Element ◽  
Failure Criteria ◽  
Composite Joints ◽  
Element Analysis ◽  
Progressive Failure Analysis ◽  
Failure Loads

A two-dimensional progressive failure analysis is conducted to predict the failure loads and modes of carbon-epoxy composite joints under pin-loading. An eight-node laminated shell element is used for the finite element modeling. Post-failure stiffness is evaluated based on the complete unloading model combined with various failure criteria. The comparison of finite element and experimental results shows that the finite element analysis based on the combined maximum stress and Yamada-Sun criteria most accurately predicts the failure loads of the composite laminated joints.

The Analysis of Reinforcing the Bottom Chord around the Tapped Holes Based on the Thermosetting Resin Composite Materials

2012 ◽  
Vol 531 ◽  
pp. 609-612
Author(s):  
Xue Dong Han ◽  
Li Wei ◽  
Gang Luo ◽  
Li Ping Chang
Keyword(s):  
Composite Material ◽  
Resin Composite ◽  
Steel Bridge ◽  
Stress Distributions ◽  
Element Analysis ◽  
Steel Truss Bridge ◽  
The Finite Element Analysis ◽  
Before And After ◽  
Truss Bridge

The intensity of the joint in the bottom chord would affect the quality of the whole bridge because that the force of the bottom-through bridge is transferred mainly through the bottom chord, and the members of the truss connect each other by using the thread. In this paper, the bottom chord around the tapped holes is reinforced by composite material , and the stress on the bottom chord is analyzed before and after the reinforcement using the finite element analysis method, and the stress distributions in the directions of X,Y and Z on every layer of the composite material under the bilateral reinforcing condition are extracted and compared. The results show that: Reinforcing the bottom chord around the tapped holes using the composite material can change the stress level of the bottom chord effectively, helping to improve the quality of the construction of the steel bridge and the effect of the bilateral reinforcing is better than the unilateral reinforcing and providing certain reference for the security of the steel truss bridge

scholarly journals Open-Hole 3D Braided Composites Strength Prediction and Stress Analysis

2020 ◽  
Vol 38 (4) ◽  
pp. 889-896
Author(s):  
Shuangqiang Liang ◽  
Chenglong Zhang ◽  
Ge Chen ◽  
Qihong Zhou ◽  
Frank Ko
Keyword(s):  
Failure Analysis ◽  
Progressive Failure ◽  
Failure Criteria ◽  
Element Analysis ◽  
Braided Composite ◽  
Failure Initiation ◽  
Geometry Model ◽  
Progressive Failure Analysis ◽  
3D Braided Composites ◽  
Open Hole

The stress concentration caused by notches is a common engineering issue for composite structure application. 3D braided composite possess excellent damage tolerance compared to common laminates. The tensile properties of 3D braided composite with open-hole and un-notched were experimentally examined. The mechanic properties of 3D braided composite in other directions are predicted using FGM (Fabric Geometry Model) and finite element analysis. The stress distributions around the hole and perpendicular to the loading direction are analyzed based on Abaqus software. The simulation results were compared with Lekhnitskii's analytical study. The open-hole strength of 3D braided composite was predicted respectively using Average stress failure criteria, Point stress failure criteria (PSC), and also the progressive failure analysis based on different failure criteria. The predicted strength results were compared to the experimental values. The results show the PSC predicted strength matched the experiment, while the progressive failure analysis can predict the failure initiation, propagation and final failure mode.

Cone bit bearing seal failure analysis based on the finite element analysis

2014 ◽  
Vol 45 ◽  
pp. 292-299 ◽  
Author(s):  
Yi Zhou ◽  
Zhiqiang Huang ◽  
Li Tan ◽  
Yachao Ma ◽  
Chengsong Qiu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Failure Analysis ◽  
Element Analysis ◽  
Seal Failure ◽  
The Finite Element Analysis

Experimental Study and Simple Failure Analysis of Stitched J-Stiffened Composite Shear Panels

1996 ◽  
Vol 15 (11) ◽  
pp. 1070-1087 ◽  
Author(s):  
Hsien-Yang Yeh ◽  
Victor L. Chen
Keyword(s):  
Experimental Study ◽  
Failure Analysis ◽  
Failure Criterion ◽  
Resin Transfer Molding ◽  
Failure Criteria ◽  
Transfer Molding ◽  
Tension Tests ◽  
Failure Loads ◽  
Composite Shear ◽  
Tension Strength

Two fuselage type, stitched composite shear panels with J-shape stiffeners manufactured through the process of Resin Transfer Molding technique were tested. Through the diagonal tension tests, it was found that failure of each panel occurred at approximately 3.5 times its initial buckling load, indicating significant diagonal tension strength. Neither of the panels failed by stiffener “pop-off,” showing that the stitching helps to inhibit this failure mode. No other damage or delamination of the panel was visible as well. The newly developed generalized Yeh-Stratton (Y-S) failure criterion was used to evaluate the failure of these composite panels. Compared with several other failure criteria, the calculated failure loads are quite close to experimental results and all are conservative. The Y-S criterion is the most conservative for this case.

Finite Element Analysis of Self-Pierce Riveted Joints

2007 ◽  
Vol 344 ◽  
pp. 663-668 ◽  
Author(s):  
Xiao Cong He ◽  
Ian Pearson ◽  
Ken W. Young
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sheet Material ◽  
Dissimilar Materials ◽  
Failure Criteria ◽  
Process Window ◽  
Element Analysis ◽  
Die Geometry ◽  
Riveted Joints ◽  
The Finite Element Analysis

Self-pierce riveting (SPR) is a sheet material joining technique which is suitable for joining dissimilar materials, as well as coated and pre-painted materials. Published work relating to finite element analysis of SPR joints is reviewed in this paper, in terms of process, static strength, fatigue strength, vibration characteristics and assembly dimensional prediction of the SPR joints. A few important numerical issues are discussed, including material modelling, meshing procedure, failure criteria and friction between substrates and between rivet and substrate. It is concluded that the finite element analysis of SPR joints will help future applications of SPR by allowing system parameters to be selected to give as large a process window as possible for successful joint manufacture. This will allow many tests to be simulated that would currently take too long to perform or be prohibitively expensive in practice, such as modifications to rivet geometry, die geometry or material properties. The main goal of the paper is to review recent progress in finite element analysis of SPR joints and to provide a basis for further research.

Blister propagation in sandwich panels

2019 ◽  
Vol 21 (5) ◽  
pp. 1683-1699
Author(s):  
Magnus Burman ◽  
Fredrik Stig ◽  
Dan Zenkert
Keyword(s):  
Finite Element ◽  
Fluid Pressure ◽  
Compressive Load ◽  
Sandwich Panels ◽  
Element Analysis ◽  
Air Volume ◽  
The Finite Element Analysis ◽  
Digital Correlation ◽  
Failure Loads ◽  
Element Approach

This paper deals with the problem of face/core interfacial disbonds in sandwich panels that are pressurised, i.e. the disbond has an initial fluid pressure that causes the disbond to deform. The problem is often referred to as a blister. The panel with a blister is then subjected to an in-plane compressive load. Four different panels are analysed and tested, having different size disbonds and different initial internal pressure. The cases are analysed using a finite element approach where the blister is modelled using fluid elements enabling the pressure inside the blister to vary as the in-plane load is applied. The analysis uses non-linear kinematics, and in each load step, the energy release rate is calculated along the disbond crack front. This model is used for failure load predictions. The four cases are then tested experimentally by filling a pre-manufactured disbond cavity with a prescribed volume of air. This air volume is then entrapped, and the panel is subjected to an in-plane compressive load. The load and blister pressures are measured throughout the test and compared with the finite element analysis. Surface strains and blister deformations are also measured using digital correlation measurements. The predicted failure loads compare well with the experimental results, and so does the blister pressures, the latter at least qualitatively.

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