Experimental and Numerical Investigations on Damage and Delamination in Thick Plain Weave S-2 Glass Composites Under Quasi-Static Punch Shear Loading

2004 ◽  
Author(s):  
Bazle A. Gama ◽  
Jia-Run Xiao ◽  
Md. J. Haque ◽  
Chian-Fong Yen ◽  
John W. Gillespie Jr
Keyword(s):  
Shear Loading ◽  
Glass Composites ◽  
Numerical Investigations ◽  
Plain Weave

scholarly journals Chopped Strand/Plain Weave E-Glass as Reinforcement in Vacuum Bagged Epoxy Composites

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Srinivas Shenoy Heckadka ◽  
Suhas Yeshwant Nayak ◽  
Karan Narang ◽  
Kirti Vardhan Pant
Keyword(s):  
Shear Strength ◽  
Composite Laminates ◽  
Polymer Matrix Composites ◽  
Impact Resistance ◽  
Interlaminar Shear Strength ◽  
Fiber Volume ◽  
Glass Composites ◽  
Plain Weave ◽  
Specific Strength ◽  
Interlaminar Shear

Polymer matrix composites are one of the materials being extensively researched and are gaining a lot of importance due to advantages like high specific strength, greater flexibility in design, and reduced cost of manufacturing. In this study, tensile, flexural, impact, and interlaminar shear strength of chopped strand/plain weave E-glass composites were considered. Composite laminates with different stacking sequence were fabricated using Vacuum Assisted Resin Infusion Moulding (VARIM) technique. Fiber volume fractions (FVF) of 22%, 26%, and 30% were adopted. Experiments were conducted in accordance with ASTM standards. Results indicate that laminates with three layers of plain weave mat exhibited better tensile, flexural, and interlaminar shear strength. However, laminates with two layers of chopped strand mat and one layer of plain weave mat showed improved impact resistance. In addition, scanning electron microscopy was used to analyze the fracture surface.

A comparative study of tensile properties of non-crimp 3D orthogonal weave and multi-layer plain weave E-glass composites. Part 1: Materials, methods and principal results

2009 ◽  
Vol 40 (8) ◽  
pp. 1134-1143 ◽  
Author(s):  
Stepan V. Lomov ◽  
Alexander E. Bogdanovich ◽  
Dmitry S. Ivanov ◽  
Dmitri Mungalov ◽  
Mehmet Karahan ◽  
...  
Keyword(s):  
Comparative Study ◽  
Tensile Properties ◽  
Glass Composites ◽  
Plain Weave

Failure Behavior of Plain Weave Fabric Laminates Under In-Plane Shear Loading

1994 ◽  
Vol 16 (1) ◽  
pp. 3 ◽  
Author(s):  
WS Johnson ◽  
JE Masters ◽  
TK O'Brien ◽  
NK Naik ◽  
VK Ganesh
Keyword(s):  
Shear Loading ◽  
Failure Behavior ◽  
Plane Shear ◽  
Plain Weave ◽  
Weave Fabric

Experimental and Numerical Investigations on the Failure Behavior of Pressurized Components Containing Crack Fields

2018 ◽  
Author(s):  
Patrick Gauder ◽  
Xaver Schuler ◽  
Michael Seidenfuss
Keyword(s):  
Numerical Simulations ◽  
Damage Mechanics ◽  
Base Material ◽  
Pressure Vessels ◽  
Shear Loading ◽  
Current Status ◽  
Failure Behavior ◽  
Research Project ◽  
Ongoing Research ◽  
Numerical Investigations

During the 2012 outage of the Belgian nuclear power plants (NPP) Doel 3 and Tihange 2 non-destructive testing (NDT) measurements revealed a high quantity of indications in the upper and lower core shells of the reactor pressure vessels (RPV). A root cause analysis leads to the most likely hypothesis that the indications are hydrogen flakes in segregated zones of the RPV ferritic base material. The laminar and quasi-laminar orientation (0° – 15° inclination to the pressure retaining surface) of the hydrogen flakes, the interaction of several adjacent flakes and the mechanical loading conditions lead to a mixed-mode behavior at the crack tips. In the framework of an ongoing research project, experimental and numerical investigations are conducted with the aim to describe the failure behavior of such complex crack configurations. The experiments are carried out using two ferritic materials. One is a non-irradiated representative RPV steel (SA 508 Class 2) and the second material is a special lower bound melt of a modified 22NiMoCr3-7 steel (FKS test melt KS 07 C) containing hydrogen flakes. A material characterization is done for both materials including tensile specimens, notched round bars, shear-, torsion- and compact-tension-shear (CTS) - specimens to investigate different stress states. Furthermore, flat tensile specimens with eroded artificial crack fields are used to investigate the interaction between the cracks in different arranged crack fields. Numerical simulations are carried out with extended micromechanical based damage mechanics models. For the description of ductile failure an enhanced Rousselier model is used and an enhanced Beremin model to calculate the probability of cleavage fracture. To account the sensitivity for low stress triaxiality damage by shear loading, the Rousselier model was enhanced with a term to account for damage evolution by shear. The Beremin model will be enhanced with a term to account for different levels of triaxiality. For the numerical simulations in the transition region of ductile-to-brittle failure a coupled damage mechanics model (enhanced Rousselier and Beremin) will be used. In this paper, the current status of the ongoing research project and first results are presented.

scholarly journals Numerical Investigations on Non-Rectangular Anchor Groups under Shear Loads Applied Perpendicular or Parallel to an Edge

CivilEng ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 692-711
Author(s):  
Boglárka Bokor ◽  
Akanshu Sharma
Keyword(s):  
Failure Modes ◽  
Failure Load ◽  
Shear Loading ◽  
Constitutive Law ◽  
Kinematic Constraint ◽  
Microplane Model ◽  
Numerical Investigations ◽  
Shear Loads ◽  
Current Design ◽  
Rectangular Configuration

Anchorages of non-rectangular configuration, though not covered by current design codes, are often used in practice due to functional or architectural needs. Frequently, such anchor groups are placed close to a concrete edge and are subjected to shear loads. The design of such anchorages requires engineering judgement and no clear rules are given in the codes and standards. In this work, numerical investigations using a nonlinear 3D FE analysis code are carried out on anchor groups with triangular and hexagonal anchor patterns to understand their behavior under shear loads. A microplane model with relaxed kinematic constraint is utilized as the constitutive law for concrete. Two different orientations are considered for both triangular and hexagonal anchor groups while no hole clearance is considered in the analysis. Two loading scenarios are investigated: (i) shear loading applied perpendicular and towards the edge; and (ii) shear loading applied parallel to the edge. The results of the analyses are evaluated in terms of the load-displacement behavior and failure modes. A comparison is made between the results of the numerical simulations and the analytical calculations according to the current approaches. It is found that, similar to the rectangular anchorages, and also for such non-rectangular anchorages without hole clearance, it may be reasonable to calculate the concrete edge breakout capacity by assuming a failure crack from the back anchor row. Furthermore, the failure load of the investigated groups loaded in shear parallel to the edge may be considered as twice the failure load of the corresponding groups loaded in shear perpendicular to the edge.

Response of 3-D and Plain-Weave S-2 Glass Composites in Out-of-Plane Tension and Shear

2012 ◽  
Vol 53 (6) ◽  
pp. 989-1000 ◽  
Author(s):  
S. Chocron ◽  
C. E. Anderson ◽  
A. E. Nicholls
Keyword(s):  
Glass Composites ◽  
Plain Weave ◽  
Out Of Plane
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