ANALISIS KETINGGIAN TOOL PUNCH RIVET TERHADAP HASIL RIVET ING CONTACT PADA SWITCH LAMPU REM MOTOR TIPE C8EA

2020 ◽  
Vol 8 (2) ◽  
pp. 73-81
Author(s):  
Cuncun ◽  
Paridawati ◽  
Taufiqullah
Keyword(s):  
Flexural Strength ◽  
Manufacturing Process ◽  
Crack Problem ◽  
Initial Height ◽  
Average Hardness ◽  
Brake Light ◽  
Crack Problems ◽  
Type Switch ◽  
Wheeled Vehicles ◽  
Contact Size

The product of CBEA Terminal B / B2 Assy is one of the C8EA type Switch components used for brake light switches on two-wheeled vehicles. In the manufacturing process often experience Contact Crack. Contact Crack problems occur in the rivet ing process. This study aims to reduce / eliminate the contact Crack problem, the method used is to conduct research on variations in the height of the punch in the rivet ing process. The initial height of the punch before the research is 49.10 mm, in this study the height of the punch to be examined is 48.60 mm, 48.70 mm, 48.80 mm, 48.90 mm and 49.00 mm. The results obtained for the most appropriate punch height are the height of 48.60 mm with the contact Crack ratio of 3/20, the size of the Crack & contact size entered into the standard, the flexural strength is still standard and the average hardness produced is 92.52 HV which is included in the maximum standard.

An Effective Numerical Approach for Multiple Void-Crack Interaction

2005 ◽  
Vol 73 (4) ◽  
pp. 525-535 ◽  
Author(s):  
Xiangqiao Yan
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Elastic Plate ◽  
Homogeneous Problem ◽  
Crack Problem ◽  
General System ◽  
Numerical Approach ◽  
Displacement Discontinuity ◽  
Crack Problems ◽  
Element Method

This paper presents a numerical approach to modeling a general system containing multiple interacting cracks and voids in an infinite elastic plate under remote uniform stresses. By extending Bueckner’s principle suited for a crack to a general system containing multiple interacting cracks and voids, the original problem is divided into a homogeneous problem (the one without cracks and voids) subjected to remote loads and a multiple void-crack problem in an unloaded body with applied tractions on the surfaces of cracks and voids. Thus the results in terms of the stress intensity factors (SIFs) can be obtained by considering the latter problem, which is analyzed easily by means of the displacement discontinuity method with crack-tip elements (a boundary element method) proposed recently by the author. Test examples are included to illustrate that the numerical approach is very simple and effective for analyzing multiple crack/void problems in an infinite elastic plate. Specifically, the numerical approach is used to study the microdefect-finite main crack linear elastic interaction. In addition, complex crack problems in infinite/finite plate are examined to test further the accuracy and robustness of the boundary element method.

scholarly journals Propriedades mecânicas de tijolos fabricados com solo e água residuária de mandioca

2015 ◽  
Vol 10 (2) ◽  
pp. 213-217 ◽  
Author(s):  
N. C. de Araújo ◽  
A. P. Ramos ◽  
A. J. P. Queiroz ◽  
R. C. dos Santos ◽  
J. Da S. Buriti
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Natural Resources ◽  
Water Absorption ◽  
Ceramic Material ◽  
Manufacturing Process ◽  
Bending Strength ◽  
Ceramic Blocks ◽  
Ceramic Paste ◽  
Bodies Of Evidence

A vantagem do processo de fabricação de tijolos com manipueira é ser ecologicamente correto, pois não consome água, nem há necessidade de ir ao forno, economizando recursos naturais e fazendo uso de um efluente altamente poluente. Assim, este trabalho objetivou analisar as propriedades mecânicas de tijolos fabricados com solo associado à manipueira como alternativa sustentável. Foram avaliados os parâmetros absorção de água e resistência à flexão. Em conformidade com os resultados, observou-se que as massas cerâmicas apresentaram valores de absorção de água da ordem de 10 a 13 %, valores aceitáveis para fabricação de blocos cerâmicos e valores de resistência a flexão adequados para fabricação de tijolos maciços, tanto, os corpos de prova com queima quanto os corpos de provas sem queima. Assim, conclui-se que a troca da água pela adição da manipueira na massa cerâmica não interfere nas propriedades mecânicas e esta pode ser adicionada a massa cerâmica para fabricação de tijolos ecológicos através do processo de prensagem.Mechanical properties of manufactured bricks with soil and cassava wastewaterAbstract: The advantage of the manufacturing process of brick with cassava is being environmentally friendly because it does not consume water, and there is no need to go to the oven, saving natural resources and making use of a highly polluting effluent. This work aimed to analyze the mechanical properties of bricks made from soil associated with cassava as a sustainable alternative. Parameters were evaluated water absorption and flexural strength. In accordance with the results, it was observed that the ceramic material provided water absorption values of the order of 10 to 13%, acceptable values for manufacturing ceramic blocks and bending strength values suitable for manufacture of solid bricks, both proof bodies test with burns as the proof bodies of evidence without burning. It is therefore concluded that the replacement of water by the addition of cassava the ceramic mass does not interfere with the mechanical properties and that can be added to the ceramic paste for manufacturing green bricks through the pressing process.

scholarly journals The Aging Time Effects of the Pre-expanded Polystyrene on the Patterns Mechanical Properties

2015 ◽  
Vol 15 (1) ◽  
pp. 131-137 ◽  
Author(s):  
K. Buczkowska ◽  
T. Pacyniak
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Manufacturing Process ◽  
Smooth Surface ◽  
Raw Materials ◽  
Expanded Polystyrene ◽  
Optimum Time ◽  
Time Effects ◽  
Blowing Agent ◽  
Sintering Time

Abstract The aging granulate is to activate the blowing agent during the manufacturing process to granulate models can re-expand and shape the model of well-sintered granules, smooth surface and a suitable mechanical strength. The article presents the results of studies which aim was to determine the optimum time for aging pre-foamed granules for pre-selected raw materials. The testing samples were shaped in an autoclave, with constant parameters sintering time and temperature. Samples were made at 30 minute intervals. Models have been subjected to flexural strength and hardness.

Theoretical Analysis and Engineering Improvement Test Verification of the Crack Problem in the Back Van of the Vehicle

2011 ◽  
Vol 121-126 ◽  
pp. 3431-3436
Author(s):  
Guo Quan Yang ◽  
You Qun Zhao ◽  
Jun Yan Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Theoretical Analysis ◽  
Crack Problem ◽  
Engineering Application ◽  
Reference Value ◽  
Element Analysis ◽  
Crack Problems ◽  
The Finite Element Analysis ◽  
Test Verification

This paper discussed the theoretical analysis and engineering improvement test verification of the crack problem in the back van of the vehicle. Causes that may result in the crack problem are firstly analyzed and then determined by the finite element analysis. Improvement are given and proved to be effective by the test verification of an improved vehicle. The method used in this paper will contribute to the analysis and solution of the crack problems in some parts of the vehicle and has reference value in engineering application.

Integral Equation Methods for Multiple Crack Problems and Related Topics

2007 ◽  
Vol 60 (4) ◽  
pp. 172-194 ◽  
Author(s):  
Y. Z. Chen
Keyword(s):  
Integral Equation ◽  
Integral Equations ◽  
Crack Problem ◽  
Plane Elasticity ◽  
Point Sources ◽  
Fredholm Integral Equations ◽  
Hypersingular Integral Equation ◽  
Multiple Crack ◽  
Antiplane Elasticity ◽  
Crack Problems

The content of this review consists of recent developments covering an advanced treatment of multiple crack problems in plane elasticity. Several elementary solutions are highlighted, which are the fundamentals for the formulation of the integral equations. The elementary solutions include those initiated by point sources or by a distributed traction along the crack face. Two kinds of singular integral equations, three kinds of Fredholm integral equations, and one kind of hypersingular integral equation are suggested for the multiple crack problems in plane elasticity. Regularization procedures are also investigated. For the solution of the integral equations, the relevant quadrature rules are addressed. A variety of methods for solving the multiple crack problems is introduced. Applications for the solution of the multiple crack problems are also addressed. The concept of the modified complex potential (MCP) is emphasized, which will extend the solution range, for example, from the multiple crack problem in an infinite plate to that in a circular plate. Many multiple crack problems are addressed. Those problems include: (i) multiple semi-infinite crack problem, (ii) multiple crack problem with a general loading, (iii) multiple crack problem for the bonded half-planes, (iv) multiple crack problem for a finite region, (v) multiple crack problem for a circular region, (vi) multiple crack problem in antiplane elasticity, (vii) T-stress in the multiple crack problem, and (viii) periodic crack problem and many others. This review article cites 187 references.

Microstructure and Mechanical Properties of MoSi2 Coating Deposited on Mo Substrate by Hot Dipping Processes

2019 ◽  
Vol 14 (12) ◽  
pp. 1680-1685 ◽  
Author(s):  
Yingyi Zhang ◽  
Shahid Hussain ◽  
Kun Cui ◽  
Tao Fu ◽  
Jie Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Important Influence ◽  
Strength Increase ◽  
Average Hardness ◽  
Microstructure And Mechanical Properties ◽  
Dipping Temperature ◽  
Mosi2 Coating ◽  
Dipping Process ◽  
Dipping Time

MoSi2 coating was deposited on Mo substrate by a hot dipping process within the silicon bath. The effects of the hot dipping temperature and time on the thickness and mechanical properties of MoSi2 coating have been investigated. The results indicated that the average hardness of MoSi2 coating is only 209.15 MPa, and the average flexural strength is 873.63 MPa. Therefore, the MoSi2 coating deposited on Mo substrate exhibit better mechanical properties than monolithic MoSi2 and MoSi2 -based composites. In addition, the hot dipping processes have an important influence on mechanical properties. The hardness and flexural strength decrease sharply with increasing hot dipping temperature, then increases slightly on increasing hot dipping temperature. Meanwhile, the hardness and flexural strength increase sharply with increasing hot-dipping time.

Thermoelastic Fracture Mechanics for Nonhomogeneous Material Subjected to Unsteady Thermal Load

1999 ◽  
Vol 67 (1) ◽  
pp. 87-95 ◽  
Author(s):  
B. L. Wang ◽  
J. C. Han ◽  
S. Y. Du
Keyword(s):  
Functionally Graded Materials ◽  
Material Properties ◽  
Crack Problem ◽  
Laminated Composite ◽  
Functionally Graded ◽  
Comprehensive Treatment ◽  
Numerical Illustration ◽  
Graded Materials ◽  
Nonhomogeneous Material ◽  
Crack Problems

This article provides a comprehensive treatment of cracks in nonhomogeneous structural materials such as functionally graded materials. It is assumed that the material properties depend only on the coordinate perpendicular to the crack surfaces and vary continuously along the crack faces. By using a laminated composite plate model to simulate the material nonhomogeneity, we present an algorithm for solving the system based on the Laplace transform and Fourier transform techniques. Unlike earlier studies that considered certain assumed property distributions and a single crack problem, the current investigation studies multiple crack problems in the functionally graded materials with arbitrarily varying material properties. The algorithm can be applied to steady state or transient thermoelastic fracture problem with the inertial terms taken into account. As a numerical illustration, transient thermal stress intensity factors for a metal-ceramic joint specimen with a functionally graded interlayer subjected to sudden heating on its boundary are presented. The results obtained demonstrate that the present model is an efficient tool in the fracture analysis of nonhomogeneous material with properties varying in the thickness direction. [S0021-8936(00)01601-9]

scholarly journals Determination of Optimal Process Parameters In The Process Of Making Ceramics To Maximize Flexural Strength Using the Taguchi Method (Case Study at the Kasongan Ceramics UKM Center, Bantul, DIY)

OPSI ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 66
Author(s):  
Sutrisno Sutrisno Sutrisno ◽  
Dyah Rachmawati Lucitasari
Keyword(s):  
Flexural Strength ◽  
Taguchi Method ◽  
Process Parameters ◽  
Orthogonal Array ◽  
Manufacturing Process ◽  
Bending Strength ◽  
Total Production ◽  
Ceramic Manufacturing

Kasongan Ceramic UKM Center is an association of UKM which makes goods made from clay. Kasongan Ceramic UKM Center, located in Bantul Regency, DIY. The problem that is often experienced by Kasongan Ceramics Center is that products that are often cracked, warped, and easily brittle. The total production of Kasongan UKM Center from September 2019 to February 2020 was 32,256 units, with the number of defective products amounting to 3,873 or 12% of the total production. Based on the studies that have been done, it can be concluded that the defects of cracks, curling, and brittleness that occur are one of them caused by the less than optimal flexural strength of the ceramic products produced. To maximize the flexural strength of the ceramic products produced, the optimal ceramic manufacturing process parameters will be determined using the Taguchi method. To maximize the flexural strength in the process of making ceramics using the Taguchi method, it is necessary to do an experimental design. The first thing to do is to determine the controlled factors and levels in the ceramic manufacturing process that affect the flexural strength. After that determine a suitable orthogonal array and perform experiments based on the specified orthogonal array. The experimental results will be tested for its flexural strength in the laboratory. The resulting flexural strength data will be processed to determine the optimal ceramic manufacturing process parameters that maximize the bending strength of ceramics. Based on the data processing carried out, it is found that the optimal ceramic-making process parameters at the Kasongan Ceramics UKM Center that maximize flexural strength are the composition of 3 parts Godean clay, 3 parts Kasongan clay composition, 1 part sand composition, and burning using an open tub. 

scholarly journals A New Microhardness Testing Method on Grating Films

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Haitao Ma ◽  
Yi Jin ◽  
Jirigalantu
Keyword(s):  
Manufacturing Process ◽  
Test Method ◽  
Contour Length ◽  
Maximum Deviation ◽  
Model Parameters ◽  
Large Area ◽  
Average Hardness ◽  
Tool Edge ◽  
Microhardness Testing ◽  
The Relationship

The manufacturing process of large-area, high-precision gratings is a very complicated and time-consuming process. The hardness testing of grating films is an important step in the entire process. In order to simplify the manufacturing process of gratings, we have proposed a new method for testing microhardness based on tool edge indentation. Also, it unified tool adjustment and microhardness testing steps in the grating manufacturing process. First, a mathematical model of the relationship between tool load and indentation contour length is established. The model parameters were then modified using tool indentation experiments with different loads. When measured with a nanoindenter, the average hardness of the grating film was 447 MPa. The hardness value of the grating film obtained by our proposed method is almost the same as that measured by the nanoindenter, and the maximum deviation is about 2.2% of the average hardness value. The experimental results show that our proposed method can replace the microhardness test method of using a nanoindenter. Therefore, the disadvantages of using a nanoindenter to test the hardness of a grating film are avoided, such as the limited sample size, the sensitivity of the indenter to the roughness of the film and the depth of the indentation, and the accuracy of film testing, and the efficiency of grating ruling can be improved.

Comparison of Hardness and Microstructure of Cast Wheel and Spoke Wheel Rims of Motorcycles Made of Aluminum Alloy Alloy

2021 ◽  
Vol 892 ◽  
pp. 81-88
Author(s):  
Husaini ◽  
Ali Nurdin ◽  
Abdillah Sofian ◽  
Nuzan Rizki Muhammad
Keyword(s):  
Aluminum Alloy ◽  
Manufacturing Process ◽  
Mechanical Characteristics ◽  
Hardness Test ◽  
Hardness Testing ◽  
Average Hardness ◽  
Vehicle System ◽  
Compressive Loads ◽  
The Difference ◽  
Main Components

The rim is one of the main components in a motorized vehicle system, both two and three wheels. Rim loads when used are dynamic and often even shock. This study aims to study the mechanical characteristics, especially the hardness properties of spoke wheel rims and cast wheel rims made of aluminum alloy used in motorcycles and compare the results. Hardness testing is carried out on the spoke wheel and cast wheel specimens, using the Rockwell method with an identifier of 1/16 ball and a spectrometer used for both microstructure observations. The result of the average hardness test for the spoke wheel is HRB 99.3, while for the cast wheel is HRB 76.5. From the hardness test, it can be concluded that the hardness of the spoke wheel type is higher than the cast wheel type due to the difference in the manufacturing process. Cast wheel rims can withstand a load of 3 tons (30000 N) and the value of rim tension that can be accepted until the fracture is 45.84 MPa. Meanwhile, spoke wheel rims have the ability to withstand smaller compressive loads than cast wheel rims, which are 2 tonnes (20000 N) and the rims can accept the stress of 66.04 MPa until they break.

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