scholarly journals Damage comparative analysis of needled C/SiC composite under vibration fatigue loading and monotonic tensile loading

2021 ◽  
Vol 2125 (1) ◽  
pp. 012041
Author(s):  
Shaodong Wu ◽  
Deguang Shang ◽  
Linxuan Zuo ◽  
Linfeng Qu ◽  
Geng Hou ◽  
...  
Keyword(s):  
Tensile Test ◽  
Tensile Loading ◽  
Fatigue Loading ◽  
Shaking Table ◽  
Loading Frequency ◽  
Vibration Loading ◽  
Plate Specimen ◽  
Vibration Fatigue ◽  
Fracture Morphologies ◽  
Scanning Electron

Abstract Needled C/SiC composite is composed of fiber and matrix, witch fatigue limit is related to the vibration loading frequency. A kind of plate specimen made of needled C/SiC composite was tested on a shaking table, and the vibration fatigue life of each specimen was obtained. In addition, the monotonic tensile test of needled C/SiC composite specimen was also carried out. Furthermore, the fracture morphologies from vibration test and monotonic tensile test were compared by scanning electron microscope. And the mechanism causing these differences was also explained.

scholarly journals The Stress Field at an Axial Eccentrical Fatigue Loading – Influenced by the Test Temperature

2017 ◽  
Vol 69 (1) ◽  
pp. 31-39
Author(s):  
Vâlcu Roşca ◽  
Cosmin Mihai Miriţoiu
Keyword(s):  
Stress Intensity Factor ◽  
Equivalent Stress ◽  
Tensile Loading ◽  
Fatigue Loading ◽  
Length Variation ◽  
Asymmetry Coefficient ◽  
Stress Variation ◽  
Working Temperature ◽  
Plate Specimen ◽  
Material Durability

Abstract By applying a cyclic eccentrically tensile loading, oscillatory positive, determines at the crack peak that exist in a plate specimen CT type a compound loading of bending with tensile. The aim of the study is to analyze the equivalent stress variation σ, when the working temperature varies, namely: T= 293K (+20°C), T= 253K (-20C) and T= 213K (-60°C). The specimens are made from a stainless steel 10TiNiCr175 type, and were loaded with the asymmetry coefficient R= 0.1. There are drawn the variation curves of stress versus the crack length variation, σ(a), versus the material durability, σ(N), and respectively versus the stress intensity factor, σ(ΔK), for the three loading temperatures.

Evaluation of Lamina Properties and Fractographic Studies on Glass/Epoxy, Carbon/Epoxy and Kevlar/Epoxy Composites

2015 ◽  
Vol 813-814 ◽  
pp. 46-50 ◽  
Author(s):  
Julias A. Arockia ◽  
Kumar N. Ram ◽  
Murali Vela
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Tensile Test ◽  
Epoxy Composite ◽  
Epoxy Composites ◽  
Strain Gauges ◽  
Transverse Strain ◽  
Molding Machine ◽  
Mechanism Of Failure ◽  
Scanning Electron

In this study the lamina properties of glass/epoxy, carbon/epoxy and kevlar/epoxy composite along their principal coordinate axes were evaluated by performing tensile test. The laminates were prepared by hand lay-up technique and compressed using a compression molding machine at 70 oc and 80 bar pressure. The test was conducted as per ASTM standard D3039 by affixing strain gauges in the specimen to obtain the longitudinal and transverse strain. The mechanism of failure was also studied by performing fractographic analysis using scanning electron microscope which shows peeled off fiber surfaces in the case of kevlar/epoxy laminate.

scholarly journals The Evaluation of the Fracture Surface in the AW-6060 T6 Aluminium Alloy under a Wide Range of Loads

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 324 ◽  
Author(s):  
Marcin Chybiński ◽  
Łukasz Polus ◽  
Maria Ratajczak ◽  
Piotr Sielicki
Keyword(s):  
Fracture Surface ◽  
Strain Rate ◽  
Aluminium Alloy ◽  
Strain Rate Sensitivity ◽  
Rate Sensitivity ◽  
Tensile Loading ◽  
Engineering Structures ◽  
Fracture Surfaces ◽  
Wide Range ◽  
Scanning Electron

The present study focused on the behaviour of the AW-6060 aluminium alloy in peak temper condition T6 under a wide range of loads: tensile loading, projectile and explosion. The alloy is used as a structural component of civil engineering structures exposed to static or dynamic loads. Therefore, it was crucial to determine the material’s behaviour at low and intermediate rates of deformation. Despite the fact that the evaluation of the strain rate sensitivity of the AW-6060 aluminium alloy has already been discussed in literature, the authors of this paper wished to further investigate this topic. They conducted tensile tests and confirmed the thesis that the AW-6060 T6 aluminium alloy has low strain rate sensitivity at room temperature. In addition, the fracture surfaces subjected to different loading (tensile loading, projectile and explosion) were investigated and compared using a scanning electron microscope, because the authors of this paper were trying to develop a new methodology for predicting how samples had been loaded before failure occurred based on scanning electron microscopy (SEM) micrographs. Projectile and explosion tests were performed mainly for the SEM observation of the fracture surfaces. These tests were unconventional and they represent the originality of this research. It was found that the type of loading had an impact on the fracture surface.

The Effect of Trans-Polyoctylene Rubber (TOR) as Compatibilizer on Recycled Nitrile Glove (NBRr) Filled Natural Rubber Compound: Tensile Test and Morphology Studies

2014 ◽  
Vol 679 ◽  
pp. 305-310
Author(s):  
M.H. Fatin ◽  
N.Z. Noimam ◽  
S.T. Sam ◽  
M.Z. Salihin ◽  
Z. Norhafizah ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Tensile Test ◽  
Room Temperature ◽  
Rubber Compound ◽  
Surface Fracture ◽  
Elongation At Break ◽  
Roll Mill ◽  
Fine Size ◽  
Tensile Surface ◽  
Scanning Electron

Tensile test and morphology studies were performed to determine the influences of Trans-polyoctylene Rubber (TOR) as compatibilizer of NBRr filled ENR 50 with composition of 15 phr. Fine size (300μm-700μm) of NBRr was used as fillers. Both uncompatibilized and compatibilized NBRr/ENR 50 were prepared using two roll mill at room temperature with different php of 1.0, 1.5, 2.0, 2.5 and 3.0. It can be observed that tensile strength and modulus of elasticity were decreased as increased in TOR loading before started to increased at 1.5 up to 3.0. Meanwhile, the increment in the value of elongation at break when increased in the addition of TOR. The scanning electron microscopy (SEM) of the tensile surface fracture of increased TOR loading illustrated a better adhesion and dispersion in comparison of low amount of TOR loading.

Finite Element Analysis of Tensile Test for HDPE/EPR-MMT Nanocomposite

2015 ◽  
Vol 1115 ◽  
pp. 414-417
Author(s):  
N.M. Shaffiar ◽  
M.K.A. Halim ◽  
H. Anuar ◽  
M.A.H.A. Majid
Keyword(s):  
Finite Element ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Tensile Test ◽  
Tensile Loading ◽  
Nanocomposite Material ◽  
Percentage Error ◽  
Material Strength ◽  
Element Analysis

A small amount of nanodispersed filler leads to an improvement in material properties. Montmorillonite (MMT) is one type of filler commonly used in nanocomposite material. A high density polyethylene/ethylene propylene rubber - montmorillonite (HDPE/EPR-MMT) is one of the nanocomposite material that is new to the industry. This paper investigates the strength of HDPE/EPR-MMT nanocomposite under tensile loading. The experimental results of the tensile test on the nanocomposite will be compared with the tensile simulation in the Finite Element (FE) analysis for validation. The results showed that it is validated with relatively low percentage error of 0.01 % for the ultimate tensile strength and 0.18 % for the yield strength. The ultimate tensile strength of HDPE/EPR-MMT is 14.5 MPa and the yield strength is 13.2 MPa. By using MMT as a filler, the material strength is improved. The ultimate tensile strength of HDPE/EPR without filler is 11.45 MPa and the yield strength is 10.95 MPa.

Effect of Nanocellulose Loading on Tensile Properties of Nitrile Rubber

2017 ◽  
Vol 264 ◽  
pp. 112-115
Author(s):  
Erfan Suryani Abdul Rashid ◽  
Wageeh Abdulhadi Yehye ◽  
Nurhidayatullaili Muhd Julkapli ◽  
Sharifah Bee O.A. Abdul Hamid
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Tensile Test ◽  
Tensile Properties ◽  
Mechanical Performance ◽  
Butadiene Rubber ◽  
Fracture Surfaces ◽  
Scanning Electron

Nanocellulose (NCC) is incorporated into nitrile butadiene rubber (NBR) latex with the composition 0 to 5 phr using dipping method. Mechanical properties of NBR/NCC composites using tensile test was used to characterize their mechanical performance and the fracture surfaces post tensile test were studied. The tensile strength of NBR/NCC composites increase significantly with the addition of nanocellulose. This could be anticipated due to the presence of Van der Waals interaction between hydrophilic natures of nanocellulose with hydrophobic of NBR consequently limits the tearing propagation. The result was supported with the fracture surfaces morphology viewed under Fourier Emission Scanning Electron Microscopy (FESEM).

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