A Qualitative X-Ray Examination of the Structure of Fiberglass Under Static Tensile Loading

1963 ◽  
Vol 7 ◽  
pp. 182-194
Author(s):  
H. P. Materne
Keyword(s):  
Tensile Strength ◽  
Tensile Load ◽  
Incident Beam ◽  
Tensile Loading ◽  
X Ray ◽  
Average Tensile Strength ◽  
Static Tensile Loading ◽  
Static Tensile ◽  
Time Limitations

AbstractA series of four types of glasses was supplied for investigation. Six individual filaments of each glass (each filament ranged between 7 and 10 μ in diameter) were extracted and the ultimate tensile strength determined for each. The ultimate average tensile strength was then used in the determination of the tensile load applicable to the investigation.Two methods of examination were used—the Laue and a modified rotation camera. The results of the investigation seem to indicate that a reconstructive transformation in three of the four glasses studied was in process. These results have not been confirmed, due to time limitations. In the case of the E glass investigated, a series of rings were faintly produced after 15 days under 35% of the ultimate average tensile strength. These rings, actually egg-shaped ovals, appeared at 15, 20, and 30 mm from the point of contact of the incident beam. In the other modified E glass and in the YM-31A (BeO) glass, the egg-shaped configuration did not appear in the rotation camera, but did appear in the Laue examination as a semioriented series of spots.

Large Deformation Modeling of a Re-Entrant Honeycomb under Tensile Load

2016 ◽  
Vol 725 ◽  
pp. 143-148
Author(s):  
Jian Jun Zhang ◽  
Guo Xing Lu ◽  
Dong Ruan ◽  
Zhi Hua Wang
Keyword(s):  
Finite Element ◽  
Large Deformation ◽  
True Strain ◽  
Tensile Load ◽  
Strain Curve ◽  
Tensile Loading ◽  
Stress Strain Curve ◽  
Static Tensile Loading ◽  
Static Tensile ◽  
Deformation Behaviors

This work studies the large deformation behaviors of a re-entrant honeycomb subjected to the quasi-static tensile loading by employing the finite element (FE) package ABAQUS 6.11-2. The size effect of FE models is firstly investigated. Then, the deformation mechanism and stress-strain curve of a re-entrant honeycomb are discussed. Finally, the plastic Poisson’s ratio is calculated from the true strain and presented.

Damage Observation of Glass Fiber/Epoxy Composites Using Thermography and Supported by Acoustic Emission

2014 ◽  
Vol 627 ◽  
pp. 187-190 ◽  
Author(s):  
Jefri Bale ◽  
Emmanuel Valot ◽  
Martine Monin ◽  
Peggy Laloue ◽  
Olivier Polit ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Glass Fiber ◽  
Epoxy Composite ◽  
Thermal Response ◽  
Tensile Loading ◽  
Destructive Testing ◽  
Ir Camera ◽  
Damage Propagation ◽  
Static Tensile Loading ◽  
Static Tensile

This work presents an experimental study to monitor the damage propagation of composite material by non destructive testing (NDT) method. In order to achieve this, an open hole condition of glass fiber/epoxy composite has been used as the specimen test under static tensile loading and observed using two different real-time monitoring techniques of NDT namely infra-red (IR) camera and supported by Acoustic Emission. The results show that the thermal response and acoustic emission signals give a good detection on damage appearance and damage propagation of glass fiber/epoxy composite under static tensile loading conditions.

scholarly journals Determination of hard X-ray polarization from two-dimensional images

2020 ◽  
Vol 53 (6) ◽  
pp. 1559-1561
Author(s):  
Robert B. Von Dreele ◽  
Wenqian Xu
Keyword(s):  
Incident Beam ◽  
Beam Polarization ◽  
Two Dimensional ◽  
One Dimensional ◽  
X Ray ◽  
Dimensional Image ◽  
Two Dimensional Image ◽  
The Difference ◽  
Two Dimensional Images

An estimate of synchrotron hard X-ray incident beam polarization is obtained by partial two-dimensional image masking followed by integration. With the correct polarization applied to each pixel in the image, the resulting one-dimensional pattern shows no discontinuities arising from the application of the mask. Minimization of the difference between the sums of the masked and unmasked powder patterns allows estimation of the polarization to ±0.001.

Macro-Observation of the Interface of the Al-22%Si-Cu/Al-7%Si-MG Bi-Metal Parts Fabricated by Thixoforging

2016 ◽  
Vol 256 ◽  
pp. 69-74
Author(s):  
Zhao Yang ◽  
Guang Xu Wang ◽  
Xue Xuan Xu ◽  
Xiao Long He ◽  
Jian Ning Lu
Keyword(s):  
Heat Treatment ◽  
Tensile Strength ◽  
Large Scale ◽  
Optical Microscope ◽  
Flaw Detector ◽  
X Ray ◽  
Volume Stability ◽  
Metal Parts ◽  
T6 Heat Treatment ◽  
Average Tensile Strength

Thixo-forging has been proved to be able to fabricate bi-metal parts with a complex outline and a relatively regular interface economically. These products have potential applications on high volume stability radiators, brakes, and pistons. However, it is very difficult to evaluate the curved interfaces by micro observations. In this work, Al-22%Si-Cu/Al-7%Si-Mg bi-metal parts were fabricated by thixo-forging; state of the interfaces of the bi-metal parts was investigated by X-ray flaw detector observations and tensile test; optical microscope (OM) observation and scan electron microscope (SEM) observation were applied to assist the analysis. The results show that the metallurgical bonding of the interfaces is of good quality. No large scale flaw was found on the interface in X-ray flaw detector observation. It was found that higher forging pressure decreased the size of the crack on the interface and in the matrix. However, higher forging pressure can slightly improve tensile strength. Large ratio of fresh interface relates to original interface resulted in a slightly better tensile strength. Without heat-treatment, the bi-metal forgings have an average tensile strength of 106 MPa. T6 heat treatment blunted the blades of the plate like crack and nodulized the defects, T6 heat treatment also decreased the size of the Si particles. As a result, the average tensile strength of the bi-metal forgings increased to 200 MPa.

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