A METHOD FOR THE DETERMINATION OF THE KINETIC FRICTION COEFFICIENT IN FRICTION PAIRS BASED ON DIRECT ACCELERATION MEASUREMENT OF AN OBJECT ON AN INCLINED PLANE

Tribologia ◽  
2019 ◽  
Vol 284 (2) ◽  
pp. 57-64
Author(s):  
Wacław Gawędzki ◽  
Mirosław Socha
Keyword(s):  
Friction Coefficient ◽  
Measurement Errors ◽  
Laboratory Experiments ◽  
Kinetic Friction ◽  
Test Rig ◽  
Inclined Plane ◽  
Acceleration Measurement ◽  
Steel Cast ◽  
Theoretical Foundations

The paper presents and experimentally verifies a method for the determination of the kinetic friction coefficient of friction pairs. The method involves a direct acceleration measurement of an object sliding down an inclined plane and the determination of the momentary friction force based on acceleration. The laboratory test rig was presented and the theoretical foundations of the method were discussed in detail. The laboratory experiments were conducted for the following material pairs: steel-cast iron, steel-bronze, and for various inclined plane angles. The experiments results were presented, acceleration vs. time curves were plotted, and friction coefficients were determined. These values were compared to the values known from literature [L. 1–3]. The uncertainly analysis of kinetic friction coefficient determination was conducted. The method effectiveness and accuracy was verified, noting the sources of possible measurement errors and the ways to eliminate them.

scholarly journals Determination of The Rotational Friction Coefficients of Solid Cylinder with Various Inclined Plane Angle

2019 ◽  
Vol 15 (1) ◽  
pp. 52-59
Author(s):  
T. Firdaus ◽  
M. Toifur ◽  
Y. Pramudya
Keyword(s):  
Friction Coefficient ◽  
Learning Activities ◽  
Kinetic Friction ◽  
Plane Angle ◽  
Solid Cylinder ◽  
Inclined Plane ◽  
Friction Coefficients ◽  
Experimental Learning ◽  
Aluminum Cylinder

The layer texture differences of an object have an influence on the friction force caused by both planes. This research aims to determine the static and kinetic friction coefficient on several solid cylinder materials. The benefits of this research can be used to develop experimental learning activities on friction coefficient. This research used experimental method. The research was carried out by rolling samples at various inclined plane angles and measuring the traveled distance traveled in one rotation (D). The results showed that the static and kinetic friction coefficients between aluminum cylinder and glass were 0.146 and 0.097, iron cylinder and glass were 0.136 and 0.096, glass cylinder and brass were 0.132 and 0.094, nylon cylinder and glass were 0.101 and 0.090, and stainsless cylinder and glass were 0.122 and 0.094, respectively.Perbedaan tekstur lapisan sebuah benda mempunyai pengaruh pada gaya gesek yang ditimbulkan oleh kedua bidang. Penelitian ini bertujuan untuk menentukan nilai koefisien gesek statis dan koefisien gesek kinetik pada beberapa bahan silinder pejal. Manfaat yang dapat diambil dari hasil penelitian ini adalah dapat digunakan sebagai mengembangkan kegiatan pembelajaran praktikum koefisien gesekan benda. Penelitian ini menggunakan metode eksperimen. Penelitian dilaksanakan dengan menggelindingkan sampel pada berbagai sudut kemiringan dan mengukur jarak tempuh untuk satu kali putaran (D). Hasil penelitian menunjukkan bahwa nilai koefisien gesek statis dan koefisien gesek kinetik secara berurutan untuk silinder aluminium dengan kaca sebesar 0,146  dan 0,097,  untuk silinder besi dengan kaca sebesar 0,136 dan 0,096, untuk silinder kuningan dengan kaca 0,132 dan 0,094, untuk silinder nylon dengan kaca sebesar 0,101 dan 0,090, dan untuk stainsless dengan kaca sebesar 0,122 dan 0,094.

Determination of Friction Coefficient in Floating Bush Bearings by Strain Gauge Method

2010 ◽  
Vol 4 (4) ◽  
pp. 389-393 ◽  
Author(s):  
Dilip C. Patel ◽  
◽  
Deepak P. Vakharia ◽  
Keyword(s):  
Friction Coefficient ◽  
Strain Gauge ◽  
Power Loss ◽  
Journal Bearing ◽  
Frictional Coefficient ◽  
Wear Loss ◽  
Test Rig

A floating bush bearing is a kind of journal bearing in which the bushing will float between the journal and bearing. Knowing the frictional coefficient is important for the determination of wear loss and power loss conditions; an appropriate test rig is used to determine friction of floating bush bearings. The frictional coefficient of bearings in dry and lubricated conditions has been examined in experiments.

scholarly journals A new design of friction test rig and determination of friction coefficient when warm forming an aluminium alloy

2017 ◽  
Vol 207 ◽  
pp. 2274-2279 ◽  
Author(s):  
Z. Shi ◽  
L. Wang ◽  
M. Mohamed ◽  
D.S. Balint ◽  
J. Lin ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Aluminium Alloy ◽  
Warm Forming ◽  
Friction Test ◽  
Test Rig

scholarly journals Using Accelerometer Smartphone Sensor and Phyphyox for Friction Experiment in High School

2021 ◽  
Vol 2019 (1) ◽  
pp. 012008
Author(s):  
Y F Ilmi ◽  
A B Susila ◽  
B H Iswanto
Keyword(s):  
Friction Coefficient ◽  
Average Score ◽  
Kinetic Friction ◽  
Inclined Plane ◽  
Accelerometer Sensor ◽  
Physics Teachers ◽  
Acceleration Data ◽  
Plane Frame ◽  
Arduino Microcontroller ◽  
Smartphone Sensor

Abstract Experiments related to friction in schools are mostly done by direct observation, and it becomes more difficult to determine the value of the coefficients of static and kinetic friction due to the low level of accuracy. This study aims to develop a friction coefficient practicum tool using the accelerometer sensor on a smartphone with the Phyphox application. The research was conducted using the 4D Thiagarajan method (Define, Design, Develop, Disseminate). This tool demonstrates experimental friction on an inclined plane with a variety of surface materials (aluminium, wood, glass, acrylic). The results recorded by Phyphox are spreadsheets of object acceleration data per unit time in x, y, and z coordinate graphs. The sliding plane frame is designed using an Arduino microcontroller which can make it easier for students to automatically form inclined plane angles. This tool has been tested by experts with an average score are 85.25% and has been tested on physics teachers with an average score of 82.5% in the good category. This friction coefficient practicum tool is feasible and can help students understand the concept of friction

scholarly journals PENGEMBANGAN PETUNJUK PRAKTIKUM GAYA GESEK DI BIDANG MIRING BERBASIS VIDEO TRACKING UNTUK MENINGKATKAN MINAT MAHASISWA

2021 ◽  
Vol 7 (2) ◽  
pp. 335
Author(s):  
Richardo Barry Astro ◽  
Hamsa Doa ◽  
Konstantinus Denny Pareira Meke
Keyword(s):  
Research And Development ◽  
Static Friction ◽  
Video Tracking ◽  
Ease Of Use ◽  
Average Score ◽  
Student Interest ◽  
Kinetic Friction ◽  
Inclined Plane ◽  
Expert Validation

ABSTRAKPenelitian ini bertujuan menghasilkan petunjuk praktikum berbasis video tracking yang valid, praktis, dan efektif, serta mampu meningkatkan minat mahasiswa pada materi gaya gesek di bidang miring. Metode yang digunakan adalah Research and Development (R&D) dengan mengacu pada model pengembangan 4D (Define, Design, Develop dan Disseminate). Secara umum petunjuk praktikum yang dikembangkan meliputi dua topik kegiatan yakni penentuan koefisien gesek statis dengan memanipulasi kemiringan bidang serta koefisien gesek kinetis dengan menganalisis gerak benda di bidang miring. Petunjuk praktikum dalam rancangan menggunakan model praktikum/percobaan tertutup. Hasil validasi ahli yang mencakup aspek kelayakan isi, penyajian, komponen kebahasaan, dan keterlaksanaan menunjukkan petunjuk praktikum hasil pengembangan dinilai valid dengan perolehan skor rata-rata 4,03 dan layak digunakan. Hasil uji kepraktisan yang terdiri dari komponen kemenarikan, kemudahan penggunaan, dan manfaat petunjuk praktikum yang dikembangkan juga dinilai praktis dengan perolehan nilai rata-rata 3,93. Hasil uji efektifitas terhadap petunjuk praktikum menunjukkan bahwa produk pengembangan ini dinilai efektif untuk meningkatkan minat mahasiswa (kategori tinggi). Dengan demikian dapat disimpulkan bahwa produk petunjuk praktikum berbasis video tracking ini valid, praktis, efektif untuk digunakan sebagai penuntun praktikum serta mampu meningkatkan minat mahasiswa. Kata kunci: Petunjuk praktikum; video tracking; minat mahasiswa. ABSTRACTThis study is conducted to produce practical video tracking-based instructions that are valid, effective, and can increase student interest in the frictional force material on an inclined plane. The method used in this study was Research and Development (R&D) concerning the 4D development model (Define, Design, Develop and Disseminate). In general, the developed practicum instructions had covered two topics of activity, namely the determination of the coefficient of static friction by manipulating the slope of the plane and the coefficient of kinetic friction by analyzing the motion of objects on an inclined plane. Practical instructions in the design adopted a closed practicum/experimental model. The results of expert validation which include aspects of the feasibility of content, presentation, linguistic components, and implementation indicated that the practicum instructions developed were estimated valid with an average score of 4.03 and were suitable for use. On the other hand, the results of the practicality test consisting of components of attractiveness, ease of use, and the benefits of the developed practicum instructions were also considered practical with an average score of 3.93. Moreover, the results of the effectiveness test on the practicum instructions showed that this development product was considered effective for increasing student interest (high category). Thus, it can be concluded that this video tracking-based practicum guide product is valid, practical, effective to be used as a practicum guide, and is able to increase student interest. Keywords: Practical Instructions; video tracking; student interest.

Experimental Characterization of Contact Hysteresis at High Temperatures

2006 ◽  
Author(s):  
Sergio Filippi ◽  
Esequiel B. Rodrigues ◽  
Muzio M. Gola
Keyword(s):  
Friction Coefficient ◽  
Experimental Determination ◽  
Measurement System ◽  
Experimental Characterization ◽  
Test Rig ◽  
Tangential Load ◽  
Wide Range ◽  
Induction System

The current paper presents a measurement system for the experimental determination of contact hysteresis cycles at temperatures up to 800° C. A test rig was designed to conduct experiments in a wide range of temperatures, with different combinations of normal and tangential load, frequencies and contacting materials. An induction system supplies the heat for measurements of hysteresis cycles at the required temperatures. Measurements show the dependence of the friction coefficient on temperature.

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