Failure Analysis of Glass-Reinforced Epoxy Pipes Under Internal Hydrostatic Pressure: A Comparison With the Split Disk Test Method

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
H. R. Mahdavi ◽  
G. H. Rahimi ◽  
A. Farrokhabadi
Keyword(s):  
Hydrostatic Pressure ◽  
Failure Mechanisms ◽  
Failure Surface ◽  
Test Method ◽  
Short Term ◽  
Filament Wound ◽  
Short Term Test ◽  
Pressure Test ◽  
Type Of Failure ◽  
Disk Test

In this paper, the ultimate hoop strength of an industrial (±55 deg)9 filament-wound glass-reinforced epoxy (GRE) pipe as a short-term test is determined according to the ASTM D-1599 standard by performing the internal hydrostatic pressure test. After the test, the failure surface of the pipe is photographed by a high magnification camera, and in addition, the explanations are presented about the type of failure. The main purpose of this study is to compare the results obtained for the ultimate hoop strength and failure mechanisms of the pipe by using the internal hydrostatic pressure test with that by the split disk test method according to the ASTM D-2290 standard in the previous work.

scholarly journals A Long Term Shear Test for Orthotropic Composites

1993 ◽  
Vol 2 (5) ◽  
pp. 096369359300200
Author(s):  
A Yoosefinejad ◽  
P J Hogg
Keyword(s):  
Shear Test ◽  
Test Method ◽  
Test Results ◽  
Initial Test ◽  
Short Term ◽  
Shear Creep ◽  
Orthotropic Composites ◽  
Short Term Test ◽  
Properties Of Composites

A new test method is presented that is considered suitable for measuring the long term mechanical properties of composites loaded in shear. The test method is assessed for its reproducibility and accuracy and compared to conventional Iosipescu tests for short term test results. Some initial test data for long term shear creep are also presented

Short-Term Test of ±55 ̊ Filament Wound GRE Composite Pipes under Multiaxial Stress Ratios

2014 ◽  
Vol 554 ◽  
pp. 371-375
Author(s):  
Krishnan Pranesh ◽  
M.S. Abdul Majid ◽  
Mohd Afendi ◽  
Haslan Marzuki ◽  
Mohd Nor Fakhzan Mohd Kazim
Keyword(s):  
Pressure Sensors ◽  
Axial Loading ◽  
Wall Stress ◽  
Strain Response ◽  
Short Term ◽  
Stress Strain ◽  
Filament Wound ◽  
Short Term Test ◽  
Stress Ratios ◽  
Composite Pipes

This paper discusses the the development of an automated pressure testing rig to perform a short term test; Ultimate Elastic Wall Stress (UEWS) for ±55 ̊ glass fibre reinforced epoxy (GRE) composite pipe under various stress ratios. The prototype is capable of determining the stress-strain response caused by the static and cyclic pressure. This developed rig is to provide an alternative solution for the current qualification procedure explained in ISO14692 through ASTM 2992. As part of the work, an automated testing rig powered by labview program is developed with the aid of pressure sensors, solenoid valves and strain gauges which are interfaced through hardware modules from National Instruments. The UEWS test for the five stress ratios namely pure hydrostatic (2H:1A), pure hoop (1H:0A), pure axial (0H:1A), hoop to axial (1H:1A) and quad hoop to axial loading (4H:1A) were performed upon the ±55° filament wound glass-reinforced epoxy pipes. The changes in the stress strain response are captured from the strain gauge measurements and the UEWS failure points are calculated for all the loading conditions. The failure envelope developed from the failure points can be used to predict the long term performance of the GRE pipes and provide the benchmark for the design of composite pipes under various stress ratios.

Fracture toughness (Mode I) characterization of SiO 2 nanoparticle filled basalt/epoxy filament wound composite ring with split-disk test method

2017 ◽  
Vol 119 ◽  
pp. 114-124 ◽  
Author(s):  
Mehmet Turan Demirci ◽  
Necmettin Tarakçıoğlu ◽  
Ahmet Avcı ◽  
Ahmet Akdemir ◽  
İbrahim Demirci
Keyword(s):  
Fracture Toughness ◽  
Test Method ◽  
Mode I ◽  
Composite Ring ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
Wound Composite ◽  
Disk Test
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