Resistance of metals to dynamic penetration of a conical indenter

1986 ◽  
Vol 18 (5) ◽  
pp. 660-664 ◽  
Author(s):  
G. V. Stepanov ◽  
�. G. Safarov
Keyword(s):  
Conical Indenter ◽  
Dynamic Penetration

scholarly journals ANALISIS PERENCANAAN TEBAL PERKERASAN JALAN LENTUR PADA RUAS JALAN MAGELANG-SEMARANG

2020 ◽  
Vol 4 (2) ◽  
Author(s):  
Ria Miftakhul Jannah ◽  
Dedy Firmansyah ◽  
Ali Murtopo
Keyword(s):  
Penetration Test ◽  
Data Volume ◽  
Dynamic Penetration

<p>Pada perencanaan perkerasan jalan, tanah merupakan pondasi dasar yang sangat memegang peranan penting. Salah satu data tanah yang dibutuhkan dalam perencanaan pondasi perkerasan jalan adalah nilai CBR tanah. Nilai CBR tanah dapat diperoleh dengan melakukan Uji Dynamic Penetration Test (DCP). Penelitian ini dilakukan pada jalan Magelang-Semarang. Data sekunder berupa data CBR, peta lokasi dan curah hujan. Sedangkan data primer berupa data volume lalu lintas dan kondisi eksisting lokasi studi. Data yang diperoleh kemudian dihitung menggunakan Metode Bina Marga 1987. Dari hasil perhitungan didapat nilai lapisan permukaan diperoleh tebal 7,5 cm. Lapisan Pondasi Atas diperoleh tebal 20 cm. Lapisan Pondasi Bawah diperoleh tebal 16 cm.</p>

Discussion: The Dynamic Penetration Test: A Standard that is not Standardized

Géotechnique ◽  
1970 ◽  
Vol 20 (4) ◽  
pp. 452-456 ◽  
Author(s):  
H. O. Ireland ◽  
O. Moretto ◽  
M. Vargas
Keyword(s):  
Penetration Test ◽  
Dynamic Penetration

The Impact of the Conical Indenter on a Plate Laying on a Winkler Foundation

2018 ◽  
Vol 931 ◽  
pp. 84-90 ◽  
Author(s):  
Aleksey N. Beskopylny ◽  
Andrey A. Veremeenko ◽  
Elena E. Kadomtseva ◽  
Natalia I. Beskopylnaia
Keyword(s):  
Contact Time ◽  
Mechanical Characteristics ◽  
Strength Characteristics ◽  
Winkler Foundation ◽  
Building Structures ◽  
Dynamic Impact ◽  
Conical Indenter ◽  
Elastic Plastic ◽  
Plastic Indentation ◽  
The Impact

In the practice of civil engineering, the methods of impact diagnostics of materials find their application, allowing quickly and accurately measure the required strength characteristics at any point in the structure. Impact methods offer many advantages, for example, at smaller dimensions can be developed big the contact force, it can be recorded more information about the response of the material to dynamic impact and others. This approach is widely used in determining the hardness of materials and makes it possible to determine the complex mechanical characteristics: yield strength, ultimate strength, and elongation. In the paper we consider the axisymmetric problem of the impact of the conical indenter on the plate, laying on Winkler Foundation under elastic-plastic deformation. The solution is based on the phenomenological model of elastic-plastic indentation in a quasistatic formulation. The general deformations of the plate are considered elastic, and the local, in the contact zone, are elastoplastic. The main characteristics of the impact are determined: the force of the contact interaction, the local indentation, the contact time. The device and methods of determining the strength characteristics of plates under specified conditions of impact were developed on the basis of obtained solutions. The proposed method has been tested on many building structures: bridges, trusses, structural structures of artificial structures, reinforcement bars, welded joints.

Field experimental investigation on filling the soda residue soil with liquid soda residue and liquid fly ash

2020 ◽  
pp. 105678952095042
Author(s):  
Xiaoyu Bai ◽  
Jiaxiao Ma ◽  
Junwei Liu ◽  
Mingyi Zhang ◽  
Nan Yan ◽  
...  
Keyword(s):  
Fly Ash ◽  
Water Content ◽  
Raw Materials ◽  
Field Tests ◽  
Dry Density ◽  
Penetration Test ◽  
Maximum Dry Density ◽  
Liquid Mixing ◽  
Optimal Mix ◽  
Dynamic Penetration

In order to reuse waste soda residue, the feasibility of utilizing liquid soda residue and liquid fly ash to prepare soda residue soil was investigated. The mechanical properties of the soda residue soil were studied and analyzed through laboratory tests and field tests. The raw materials preparation process and liquid-liquid mixing method in the field were determined, and the optimal mixing proportion of the soda residue soil was investigated by compaction test and micro penetration test. And the filling quality of the liquid-liquid mixing and solid-liquid soda residue soil was measured by micro penetration test, light dynamic penetration test, and variable energy dynamic penetration test. The test results showed that the optimal mass ratio of soda residue to fly ash is 7:3. The optimal water content and maximum dry density of the soda residue soil with the optimal mix ratio are 63.5% and 0.88 g/cm3, respectively. After 5 months of natural drying, the soda residue soil filled by liquid soda residue and liquid fly ash has higher strength and better uniformity of hardness. The water content of the soda residue soil is between 160% to 180%, and drainage consolidation is the effective method to reduce the water content and improve the strength of the soda residue soil. Compared with the method of preparing the soda residue soil by solid mixing, the method used in this experiment is simple, efficient and feasible.

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