Elastic-viscoplasticity modeling of the thermo-mechanical behavior of chalcogenide glass for aspheric lens molding

2017 ◽  
Vol 9 (2) ◽  
pp. 252-262 ◽  
Author(s):  
Tianfeng Zhou ◽  
Qin Zhou ◽  
Jiaqing Xie ◽  
Xiaohua Liu ◽  
Xibin Wang ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Chalcogenide Glass ◽  
Aspheric Lens ◽  
Lens Molding

scholarly journals Research on single point diamond turning of chalcogenide glass aspheric lens

Procedia CIRP ◽  
2018 ◽  
Vol 71 ◽  
pp. 293-298 ◽  
Author(s):  
Longlong Tang ◽  
Tianfeng Zhou ◽  
Jia Zhou ◽  
Zhiqiang Liang ◽  
Xibin Wang
Keyword(s):  
Chalcogenide Glass ◽  
Single Point ◽  
Diamond Turning ◽  
Aspheric Lens

Precision molding of As2Se3 chalcogenide glass aspheric lens

2019 ◽  
Vol 48 (7) ◽  
pp. 742002
Author(s):  
林常规 Lin Changgui ◽  
郭小勇 Guo Xiaoyong ◽  
王先锋 Wang Xianfeng ◽  
张培晴 Zhang Peiqing ◽  
刘雪云 Liu Xueyun ◽  
...  
Keyword(s):  
Chalcogenide Glass ◽  
Aspheric Lens

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

The influence of the addition of ground olive stone on the thermo-mechanical behavior of compressed earth blocks

2020 ◽  
Vol 108 (2) ◽  
pp. 203
Author(s):  
Samia Djadouf ◽  
Nasser Chelouah ◽  
Abdelkader Tahakourt
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Mechanical Behavior ◽  
Agricultural Waste ◽  
Hydraulic Press ◽  
Dry Density ◽  
Olive Stone ◽  
Compressed Earth Blocks ◽  
Clay Matrix ◽  
Earth Blocks

Sustainable development and environmental challenges incite to valorize local materials such as agricultural waste. In this context, a new ecological compressed earth blocks (CEBS) with addition of ground olive stone (GOS) was proposed. The GOS is added as partial clay replacement in different proportions. The main objective of this paper is to study the effect of GOS levels on the thermal properties and mechanical behavior of CEB. We proceeded to determining the optimal water content and equivalent wet density by compaction using a hydraulic press, at a pressure of 10 MPa. The maximum compressive strength is reached at 15% of the GOS. This percentage increases the mechanical properties by 19.66%, and decreases the thermal conductivity by 37.63%. These results are due to the optimal water responsible for the consolidation and compactness of the clay matrix. The substitution up to 30% of GOS shows a decrease of compressive strength and thermal conductivity by about 38.38% and 50.64% respectively. The decrease in dry density and thermal conductivity is related to the content of GOS, which is composed of organic and porous fibers. The GOS seems promising for improving the thermo-mechanical characteristics of CEB and which can also be used as reinforcement in CEBS.

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