Finite element simulation of the micromechanical changes of the tissue and cells of potato response to impact test during storage by scanning electron microscopy

2020 ◽  
Vol 164 ◽  
pp. 111153
Author(s):  
Safoura Nikara ◽  
Ebrahim Ahmadi ◽  
Ali Alavi Nia
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Impact Test ◽  
Element Simulation ◽  
Scanning Electron

ENGINEERING ANALYSIS OF A FAILED COMPASS PROXIMAL INTERPHALANGEAL (PIP) JOINT HINGE

2015 ◽  
Vol 27 (02) ◽  
pp. 1550013 ◽  
Author(s):  
M. M. Youssef ◽  
D. E. T. Shepherd ◽  
O. G. Titley
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Principal Stress ◽  
Engineering Analysis ◽  
Principal Stresses ◽  
Element Analysis ◽  
Pip Joint ◽  
Scanning Electron

A failed compass hinge external fixator for fingers has been analyzed. The device consists of polymer parts manufactured from polyetherimide. Finite element analysis (FEA) was used to investigate the principal stresses in the device under different loading conditions. Scanning electron microscopy (SEM) was used to investigate the fracture surfaces. The FEA showed that the maximum principal stress was greater than the fatigue strength of polyetherimide. The SEM fractographs confirm that failure was by brittle fatigue.

Impact and Thermal Properties of Unsaturated Polyester (UPR) Composites Filled with Empty Fruit Bunch Palm Oil (EFBPO) and Cellulose

2014 ◽  
Vol 896 ◽  
pp. 310-313 ◽  
Author(s):  
Elmer Surya ◽  
Michael ◽  
Halimatuddahliana ◽  
Maulida
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Palm Oil ◽  
Impact Test ◽  
Unsaturated Polyester ◽  
Empty Fruit Bunch ◽  
Infra Red ◽  
The Matrix ◽  
The Impact ◽  
Scanning Electron

In this research, the impact properties of unsaturated polyester (UPR) composites filled with empty fruit bunch palm oil (EFBPO) and cellulose were investigated. The composites were made by hand-lay up method by mixing UPR with the content of each fillers (EFBPO and cellulose) of 5,10,15,20 wt.%. The parameter which was carried out on the prepared samples was impact test. It was found that the addition of fillers to the matrix caused the impact strength of composites increased at 10% addition of EFBPO and 5% addition of cellulose. The results were confirmed by fourier transform infra-red (FTIR) and supported by thermogravimetric analysis (TGA) and scanning electron microscopy (SEM).

Fracture Analysis of Pneumatic Control Valve Rod Used for Nuclear Power Plants

2014 ◽  
Vol 1004-1005 ◽  
pp. 1359-1364
Author(s):  
Lei Yang ◽  
Yan Li ◽  
Lu Zhang ◽  
Yun Ting Lai ◽  
Zhi Feng Luo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Impact Test ◽  
Control Valve ◽  
Fracture Analysis ◽  
Pneumatic Control ◽  
Scanning Electron

The fracture of a carbon steel pneumatic control valve rod used for Nuclear Power Plants was analyzed in terms of the microstructure, inclusions and fractogragh by means of tensile test, charpy V-Notch impact test, optical microscopy, scanning electron microscopy and energy dispersive spectroscopy. The results indicated that the fracture of the rod is induced by the unqualified chemical composition: a large number of inclusions which distribute in grain boundaries reduce the material plasticity and toughness, and eventually cause fracture.

scholarly journals Analysis of a Cementless Femoral Stem Neck Fracture Using Scanning Electron Microscopy and the Finite Element Method

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Hirokazu Takai ◽  
Daisuke Nakayama ◽  
Masatoshi Murayama ◽  
Tomoki Takahashi
Keyword(s):  
Electron Microscopy ◽  
Risk Factors ◽  
Finite Element Method ◽  
Scanning Electron Microscopy ◽  
Finite Element ◽  
Femoral Stem ◽  
Neck Fracture ◽  
Stem Fracture ◽  
Scanning Electron ◽  
Element Method

Implant fracture is one of the rarest complications of total hip arthroplasty (THA). A 57-year-old woman experienced a fracture of the femoral stem (AHFIX Q, KYOCERA, Japan) about five years after THA. We examined the broken stem by digital microscopy, scanning electron microscopy, and finite element method. The anterolateral corner of the stem’s neck was found to be the origin point of the fracture. Finite element method analysis revealed that the stress concentration was highest in the corner of the hollow for apparatus attachment. The stem’s design has been considered one of the risk factors for stem fracture. In this patient, multiple risk factors, including thin stem (the smallest size, NAR #1), use of the long neck (+3 mm), obesity (body mass index: 27.3), and adjacent osteoarthritis (contralateral THA loosening and knee osteoarthritis), were present. To our knowledge, this is the first reported case of an AHFIX Q stem fracture. Surgeons must keep in mind that fracture of the femoral stem in patients with several risk factors is possible even several years after THA.

scholarly journals Mechanical Characterization of Compact Rolled‐up Microtubes Using In Situ Scanning Electron Microscopy Nanoindentation and Finite Element Analysis

2021 ◽  
Vol 23 (8) ◽  
pp. 2170031
Author(s):  
Somayeh Moradi ◽  
Nathanael Jöhrmann ◽  
Dmitriy D. Karnaushenko ◽  
Uwe Zschenderlein ◽  
Daniil Karnaushenko ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Characterization ◽  
Element Analysis ◽  
Scanning Electron

Pathogenesis of Human Hair Defects

1974 ◽  
Vol 32 ◽  
pp. 12-13
Author(s):  
P.S. Porter ◽  
T. Aoyagi ◽  
R. Matta
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Human Hair ◽  
Standard Techniques ◽  
Scanning Electron

Using standard techniques of scanning electron microscopy (SEM), over 1000 human hair defects have been studied. In several of the defects, the pathogenesis of the abnormality has been clarified using these techniques. It is the purpose of this paper to present several distinct morphologic abnormalities of hair and to discuss their pathogenesis as elucidated through techniques of scanning electron microscopy.

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