scholarly journals The difference of Fracture Behaviour between T300 and T800 Quasi-Isotropic Composites

1992 ◽  
Vol 1 (2) ◽  
pp. 096369359200100
Author(s):  
Zen-ichiro Maekawa ◽  
Hiroyuki Hamada ◽  
Tomohiro Kitagawa ◽  
Kueichi Lee
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Tensile Test ◽  
Fracture Behaviour ◽  
Cfrp Laminates ◽  
Fracture Modes ◽  
Reinforcing Fibers ◽  
The Difference ◽  
Scanning Electron

Four types of quasi-isotropic CFRP laminates were tested in this study. Then the fracture behaviours, for example fracture modes and failure processes were observed by microscope and scanning electron microscope after tensile test. As the result, the differences of fracture behaviours between two kinds of reinforcing fibers composites are indicated.

scholarly journals The Fracture behaviour of Vectran/Epoxy Quasi-Isotropic Laminates

1992 ◽  
Vol 1 (3) ◽  
pp. 096369359200100
Author(s):  
Zen-ichiro Maekawa ◽  
Hiroyuki Hamada ◽  
Tomohiro Kitagawa ◽  
Toshihiko Okumura
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Liquid Crystalline ◽  
Fracture Behaviour ◽  
Fiber Reinforced Composites ◽  
Tensile Behaviour ◽  
Reinforced Composites ◽  
Fracture Modes ◽  
Initial Fracture ◽  
Scanning Electron

Tensile behaviour of quasi-isotropic [0/μ45/90]s liquid crystalline fiber reinforced composites were discussed. The fracture modes were observed by microscope and scanning electron microscope. As the result, initial fracture did not originate in 90° lamina, but in 45° lamina.

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.

The different influence of magnesite emissions on the surface waxes of Norway spruce and silver fir

1988 ◽  
Vol 66 (1) ◽  
pp. 125-129 ◽  
Author(s):  
E. Bermadinger ◽  
D. Grill ◽  
P. Golob
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Marked Effect ◽  
Abies Alba ◽  
Silver Fir ◽  
Fine Dust ◽  
Surface Waxes ◽  
The Difference ◽  
Dust Load ◽  
Scanning Electron

The difference in vigour between Picea abies (L.) Karst. and Abies alba Mill, in an area exposed to fine dust containing MgO is reflected in scanning electron microscope studies of the needle surfaces. The greater vitality of the silver fir is correlated with intact wax structures and a somewhat lower dust load. In contrast, the spruce reveals a marked effect on the epicuticular wax by a heavy fine-dust load. Possible causes and physiological consequences are discussed.

A Scanning Electron Microscope With Two Secondary Electron Detectors and Its Application to the Surface Topography Measurements of Magnetic Media

1992 ◽  
Vol 114 (2) ◽  
pp. 274-279 ◽  
Author(s):  
K. Tanaka ◽  
K. Nishimori ◽  
K. Maeda ◽  
J. Matsuda ◽  
M. Hotta
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Topography ◽  
Secondary Electron ◽  
Wear Testing ◽  
Magnetic Media ◽  
Wear Process ◽  
Surface Gradient ◽  
The Difference ◽  
Scanning Electron

A scanning electron microscope (SEM) with two secondary electron detectors is applied for the surface topography measurement of magnetic media. The principle of gradient determination of the SEM is based on a relation that the difference in the square signals between the two detectors is linearly proportional to surface gradient. The great advantage of the instrument is the capability of relocation for profiling. It is extremely useful for the examination of wear process at a fixed position in a sequential manner during wear testing. This is demonstrated by two sample data of measurement on thin film rigid disks.

Considerations in Making Stereo Micrographs with the Scanning Electron Microscope - Positioning the Stereo Window

1976 ◽  
Vol 34 ◽  
pp. 508-509
Author(s):  
Earl R. Walter
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Tilt Angle ◽  
Field Of View ◽  
Stereo Pair ◽  
The Difference ◽  
Scanning Electron

A variety of factors must be controlled in order to obtain stereo micrograph pairs with the SEM which provide maximum effectiveness along with ease of viewing. These include the following:1. Where possible, micrographs should be sharp from edge to edge. This may require the use of an Autofocus attachment although somewhat the same effect can be obtained by maintaining the point of sharpest focus near opposite edges of the two micrographs forming the stereo pair.2. The difference in tilt angle between the two micrographs of the pair should be kept in the 4to 6° range to provide a normal perspective.3. Micrographs forming a stereo pair should be made at relatively low tilt angles to prevent large differences in the field of view of the two micrographs and to minimize the left to right magnification variations.

TENSILE PROPERTIES OF CARBON NANOFIBERS USING NANO-MANIPULATOR INSIDE SCANNING ELECTRON MICROSCOPE

2011 ◽  
Vol 25 (31) ◽  
pp. 4233-4236 ◽  
Author(s):  
HOON-SIK JANG ◽  
SEUNG HOON NAHM ◽  
JUNG HAN KIM ◽  
KYU HWAN OH
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Tensile Test ◽  
Carbon Nanofiber ◽  
Strain Curve ◽  
Force Sensor ◽  
Displacement Curve ◽  
Set Up ◽  
Scanning Electron ◽  
Tem Grid

We performed the tensile test of an individual carbon nanofiber (CNF) inside a scanning electron microscope. The mechanical testing system was installed in a scanning electron microscope (SEM). The nano-manipulator was set up in the SEM, and the force sensor, which is formed as a cantilever, was mounted on the nano-manipulator. Then, the force sensor can be controlled by using the nano-manipulator. The CNFs were dispersed on the transmission electron microscope (TEM) grid, and the both end of the CNFs were welded on the TEM grid and the tip of force sensor by exposing electron-beam of the SEM. The tensile test of the CNFs was performed by controlling the nano-manipulator. The load response during the tensile test was obtained by force sensor. Stess-strain curve was obtained from force-displacement curve of CNF after tensile test. The elastic modulus of CNFs was calculated at ~12.5 GPa.

Effect of Ce on Microstructure and Mechanical Properties of 21Cr-11Ni Austenitic Stainless Steel

2013 ◽  
Vol 711 ◽  
pp. 95-98
Author(s):  
Xiao Liu ◽  
Jing Long Liang
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Electron Microscope ◽  
Austenitic Stainless Steel ◽  
Scanning Electron Microscope ◽  
Tensile Test ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Metallographic Examination ◽  
Scanning Electron

The effect of Ce on structure and mechanical properties of 21Cr11Ni austenitic stainless steels were studied by metallographic examination, scanning electron microscope (SEM), tensile test. The results show that the proper amount of Ce can refine microstructure of austenitic stainless steel. Fracture is changed from cleavage to ductile fracture by adding Ce to austenitic stainless steel. 21Cr11Ni stainless steel containing 0.05% Ce can improve its high temerature strength, and the strength is increased 21.81% at 1073K respectively comparing with that of 21Cr11Ni stainless steel without Ce.

Tensile Test of Individual Multi Walled Carbon Nanotube Using Nano-Manipulator inside Scanning Electron Microscope

2006 ◽  
Vol 326-328 ◽  
pp. 329-332 ◽  
Author(s):  
Hoon Sik Jang ◽  
Sung Hwan Kwon ◽  
Am Kee Kim ◽  
Seung Hoon Nahm
Keyword(s):  
Electron Microscope ◽  
Carbon Nanotube ◽  
Scanning Electron Microscope ◽  
Tensile Test ◽  
Force Sensor ◽  
Displacement Curve ◽  
Linear Deformation ◽  
Deformation And Fracture ◽  
Multi Walled Carbon Nanotube ◽  
Scanning Electron

We have attempted to observe straining responses of an individual multi-walled carbon nanotube (MWNT) by performing an in-situ tensile testing inside scanning electron microscope (SEM). The both ends of an individual MWNT was attached on the rigid support and the tip of the force sensor using electron beam and was elongated by a nano-manipulator. The nano-manipulator was automatically controlled by personal computer. Linear deformation and fracture behaviors of MWNT were successfully observed and its force-displacement curve was also measured from the bending stiffness and displacement of the force sensor and manipulator. The tensile properties of individual MWNT were evaluated from the tensile test results.

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