scholarly journals Delamination failure analysis of aircraft composite material opening siding

2021 ◽  
pp. 623-628
Author(s):  
J. He ◽  
F.L. Cong ◽  
L. Lin ◽  
B.T. Wang
Keyword(s):  
Composite Material ◽  
Failure Analysis ◽  
Delamination Failure

Structural Failure Analysis of Shaft of Wobbly and Attrited Testing Equipment

2012 ◽  
Vol 224 ◽  
pp. 105-108
Author(s):  
Ying Chun Liu ◽  
Yun Zuo
Keyword(s):  
Heat Treatment ◽  
Composite Material ◽  
Fatigue Strength ◽  
Structural Analysis ◽  
Failure Analysis ◽  
Static Analysis ◽  
Testing Equipment ◽  
Structural Failure ◽  
Treatment Analysis ◽  
Design And Manufacture

In order to research the fatigue strength of gasket which is with new composite material in one plane, we designed and manufactured special testing equipment. The material of shaft of testing equipment is 30CrMnSi. In the experiment, the 30CrMnSi shaft was broken into two parts by suddenly. By structural analysis, static analysis and heat treatment analysis for shaft, we get the reason of fracture for shaft finally. The problem solved make the test goes well and can help design and manufacture testing equipment in the future.

scholarly journals Failure Analysis of Woven Kevlar/Epoxy under Uniaxial Tension

2018 ◽  
Vol 7 (4.26) ◽  
pp. 235
Author(s):  
Norzihan Rahimi ◽  
Ahmad Kamil Hussain ◽  
Mohd Sultan Ibrahim Shaik Dawood ◽  
Adib Zulfadhli Mohd Alias ◽  
Muhamed Hafiy Afiq Md Yusoff ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Failure Analysis ◽  
Uniaxial Tension ◽  
Weight Ratio ◽  
High Strength ◽  
Fiber Failure ◽  
Stress Theory ◽  
Failure Behaviour ◽  
Finite Element Software

The increasing demand for newer materials with versatile properties such as high strength-to-weight ratio; has made fiber reinforced composite materials a favourable choice in various applications, particularly in the automotive, aerospace, marine, sports and defense industries. Moreover, the properties of a composite material could be tailored for specific functions or applications. Despite its many attractive features, composite material fails in a complex manner involving matrix failure, fiber failure and delamination. This failure behaviour needs to be well established. The objective of this study is to perform failure analysis on a woven Kevlar/Epoxy composite laminate subjected to uniaxial tension and establish its failure trend. The lamination sequence is (θ4/04/-θ4)S where the angle, θ, ranges from 0o to 90o. The failure analysis was carried out using a commercial finite element software, Ansys and comparisons were made using analytical methods (Matlab). The values of stresses were computed and Maximum Stress Theory was employed to check for failure. The trend of failure, in terms of the failure curves (normalized first ply failure and last ply failure loads), for woven Kevlar/Epoxy was established. This study had produced new failure datas for woven Kevlar/Epoxy and thus, contributes significant knowledge about the failure behaviour of composite materials.  

Precision Ion Milling of Layered, Multi-Element TEM Specimens with High Specimen Preparation Spatial Resolution

1991 ◽  
Vol 254 ◽  
Author(s):  
Ron Anderson ◽  
John Benedict
Keyword(s):  
Composite Material ◽  
Failure Analysis ◽  
Spatial Resolution ◽  
Ceramic Composite ◽  
Semiconductor Industry ◽  
Specimen Preparation ◽  
Ion Milling ◽  
Tem Analysis ◽  
Ceramic Composite Material ◽  
Resolution Requirements

It is now a requirement in the semiconductor industry to prepare TEM specimens of pre-specified regions with a specimen preparation resolution exceeding 100nm. In other words, given the coordinates x, y, z of the location desired for TEM analysis, the TEM specimen preparation procedure must yield a thin TEM specimen containing the point x, y, z plus or minus 100nm. Preparation of failure analysis specimens in other fields of endeavor, such as: metallurgical, ceramic, composite material laboratories etc., have specimen preparation spatial resolution requirements below one micron in some cases with the likelihood that greater precision will be required in the future.

Failure analysis of orthotropic composite material under thermo-elastic loading by XFEA

2020 ◽  
Vol 26 ◽  
pp. 2163-2167
Author(s):  
Pankaj Kumar ◽  
Himanshu Pathak ◽  
Akhilendra Singh ◽  
Indra Vir Singh
Keyword(s):  
Composite Material ◽  
Failure Analysis ◽  
Orthotropic Composite ◽  
Orthotropic Composite Material ◽  
Elastic Loading

scholarly journals Failure Analysis of Laminated Composite Plate Under Hygro-Thermo Mechanical Load and Optimisation

2019 ◽  
Vol 24 (3) ◽  
pp. 509-526
Author(s):  
A. Choudhury ◽  
S.C. Mondal ◽  
S. Sarkar
Keyword(s):  
Composite Material ◽  
Failure Analysis ◽  
Fiber Orientation ◽  
Failure Load ◽  
Mechanical Load ◽  
Laminated Composite ◽  
Composite Plates ◽  
Material System ◽  
Laminated Composite Plate ◽  
Failure Theories

Abstract Failure analysis of laminated composite plates for different mechanical, thermo mechanical and hygro-thermo mechanical loads for different ply thicknesses, stacking sequences, fiber orientation angles and composite material systems is presented in the paper. A comparative study of different failure theories is also presented in the paper. The effect of fiber orientation angles on the first ply failure load is also studied. A hybrid composite laminate is developed based on the first ply failure load which minimizes weight and cost. The last ply failure load based on fully discounted method is calculated for different stacking sequences. An optimum composite material system and laminate layup is studied for a targeted strength ratio which minimizes weight.

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