scholarly journals Approximation of limit amplitude diagram for destructive elements of safety devices

2020 ◽  
Vol 164 ◽  
pp. 14009
Author(s):  
Viktor Artiukh ◽  
Vladlen Mazur ◽  
Yurii Sahirov ◽  
Yuri Geraskin
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Yield Strength ◽  
Linear Approximation ◽  
Safety Factor ◽  
Maximum Stress ◽  
Iron And Steel ◽  
Safety Devices ◽  
Iron And Steel Works ◽  
Limit Amplitude

The maximum stress of the cycle should be limited not by yield strength but by tensile strength of detail material intended to be destructed. Therefore, such widespread linear approximations of Haigh diagram and conditions of Soderberg and Serensen-Kinasoshvili are not applicable for such details. Safety factor of fatigue strength of safety devices destructive elements should not exceed 1.0. Therefore, it is undesirable to use modified condition of Goodman for destructive elements. Two new variants of linear approximation of Haigh limit amplitudes diagram were developed. Both variants have proven their efficiency in design and operation of safety devices with destructive elements in framework of laboratory ‘Protection of metallurgical machines from breakdowns’ of the Chief mechanic department of PJSC ‘ILYICH IRON AND STEEL WORKS’ (Mariupol city, Ukraine).

PEMBANGUNAN KAEDAH PENCIRIAN SIFAT MEKANIKAL BAHAN POLIMER MENGGUNAKAN ANALISIS I-KAZ 4D/DEVELOPMENT OF POLYMER MECHANICAL PROPERTIES CHARACTERISTICS USING I-KAZ 4D ANALYSIS METHOD

2018 ◽  
Vol 80 (3) ◽  
Author(s):  
Mohd Irman Ramli ◽  
Mohd. Zaki Nuawi ◽  
Mohammad Rasidi Mohammad Rasani ◽  
Shahrum Abdullah ◽  
Muhamad Arif Fadli Ahmad ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fatigue Strength ◽  
Yield Strength ◽  
Vickers Hardness ◽  
Compression Strength ◽  
Poisson Ratio ◽  
Vibration Signal ◽  
Ball Impact ◽  
Linear Coefficient

This study was undertaken to develop an alternative method based on signal analysis known as I-kaz 4D or I-kaz 4 channels. The aim was to characterize several mechanical properties including Poisson Ratio (PR), Vickers Hardness (VH), Yield Strength (YS), Tensile Strength (TS), Compression Strength (CS) and Fatigue Strength (FS). Specimens used are Polyoxymethylene (POM), Polyvinylchloride (PVC) and Blue Nylon MC (MC Blue). Round bar shape specimens were impacted by steel ball from different heights, 20 cm to 40 cm.  This test was conducted at semi-anechoic room and follow ASTM E1876 standard accordingly. 4 accelerometer sensors were placed on the specimen surface to capture vibration signal produced by ball impact. Transient signals which generated from ball impact were analysed using Matlab software based on mathematical model I-kaz 4D. As a result, a correlation was found between I-kaz linear coefficient and material mechanical properties. However the errors are within acceptable range for all specimens used. It was found that average errors for Poisson Ratio = 0.69%, Vickers Hardness = 2.12%, Yield Strength = 3.20%, Tensile Strength = 2.43%, Compression Strength = 2.75% and Fatigue Strength = 2.02%. It has potentiality to be used for further analysis of the  respective materials.

scholarly journals Analisis Defleksi Pada Rangka Alat Pembuat Briket Sampah Organik

Jurnal METTEK ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 121
Author(s):  
Gregorius Agung Pamungkas ◽  
I Gusti Ngurah Priambadi ◽  
Anak Agung Istri Agung Sri Komaladewi
Keyword(s):  
Yield Strength ◽  
Safety Factor ◽  
Organic Waste ◽  
Maximum Stress ◽  
Simulation Method ◽  
Maximum Strain ◽  
Maximum Displacement ◽  
Steel Material ◽  
Strength Material ◽  
Minimum Safety Factor

Rangka merupakan bagian yang paling penting dari sebuah konstruksi dimana kekuatan  rangka sangat ditentukan dari bentuk dan dimensi. Kekuatan rangka pada konstruksi harus memenuhi aspek keamanan serta harus memperhatikan faktor kekuatan rangka itu sendiri. Menghitung kekuatan rangka dari alat pembuat briket sampah organik dilakukan dengan menggunakan cara simulasi untuk mengetahui kekuatan rangka dalam menerima beban. Simulasi yang dilakukan dengan menggunakan software SolidWorks 19 dengan pembebanan statis, dan dengan variasi beban 110 kg dan 4500 kg dengan menggunakan material baja tipe ASTM A36. Proses simulasi yang telah dilakukan dengan pembebanan 110 kg nilai tegangan maksimum sebesar 6.66046 N/mm2 (Mpa), nilai displacement maksimum sebesar 0.0114 mm,  nilai strain maksimum sebesar 0.0000167973 mm, dan nilai safety factor minimal sebesar 38. Dengan pembebanan 4500 kg nilai tegangan maksimum sebesar 248.26596 N/mm2 (Mpa), nilai displacement maksimum sebesar 0.4231 mm, nilai strain maksimum sebesar 0.0006269075 mm, dan nilai safety factor minimal sebesar 1. Pembebanan 110 kg  rangka  masih dapat menahan beban  dan nilai stress masih jauh dari standar yield strength material ASTM A36 sebesar 250 Mpa. Terdapat perubahan bentuk rangka saat dilakukan pembebanan tetapi masih bersifat elastis, pada pembebanan 4500 kg rangka  tidak dapat menahan beban   dan nilai stress mendekati standar yield strength material ASTM A36 sebesar 250 Mpa. Hasil simulasi menunjukkan bahwa rangka alat pembuat briket sampah organik dengan beban 110 kg dan dengan material Baja tipe ASTM A36 mampu menahan beban dengan lebih baik. Dibandingkan dengan beban 4500 kg dan dengan material yang sama. The frame is the most  important part of a construction where the strength of the frame is very much determined  from  the  shape and dimensions. The strength of the frame in construction must fulfill the safety aspect and pay attention to the strength factor of the frame itself. Calculating the strength of the frame from the organic waste briquette maker is done by using a simulation method to see the strength of the frame in receiving the load. Simulations carried out using solidWorks 19 software with static loading with a load variation of 110kg and 4500 kg using ASTM A36. The simulation process that has been carried out with a load of 110 kg with a maximum stress value of 6.66046 N / mm2 (Mpa), a maximum displacement value of 0.0114 mm, a maximum strain value of 0.0000167973 mm, and a minimum safety factor value of 38. At the load of 4500 kg the maximum stress value is 248.26596 N/mm2 (Mpa), the maximum displacement value is 0.4231 mm, the maximum strain value is 0.0006269075 mm, and  the safety factor value is at least 1. A load of 110 kg the frame can still with stand the load  and the stress value is still far from the standard yield strength material ASTM A36 of 250 Mpa. There is a change in the shape of the frame when it is charged but still elastic, at the load of 4500 kg the frame cannot with stand the load and the stress value is close to the standard yield strength material ASTM A36 of 250 Mpa. Simulation results showed that the frame of the organic waste briquette making tool with a load of 110 kg and with steel material type ASTM A36 is able to with stand the load better. Compared  to a load of 4500 kg and with the same material.

scholarly journals Mechanical Properties Of Butt Welded AZ31B Magnesium Alloys

2021 ◽  
Author(s):  
MD. S.M. Chowdhury
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fatigue Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Welding Process ◽  
Fusion Welding ◽  
Friction Stir ◽  
Brittle Phase ◽  
Welding Defect

Mechanical properties of friction stir welded (FSWed), double sided arc welded (DSAWed), fiber laser welded (FLWed) and diode laser welded (DLWed) on AZ31B Mg alloy were studied. After welding, grains at the centre became recrystallized. Brittle phase β-Mg₁₇AI₁₂ particles observed at the centre of the joint during fusion welding process. The yield strength (YS), ultimate tensile strength (UTS) and fatigue strength were lower in the FDWed samples than in the DSAWed samples. Welding defect at the bottom of the FDWed joint was observed when right hand thread (RHT) weld tool was considered. In FLWed joint, YS, UTS and fatigue strength, with a joint efficiency of ~91% was achieved while the YS, UTS and fatigue strength of the DLWed joints were notably lower. The DSAWed joints and DLWed joints exhibited a higher strain hardening capacity in comparison with the FSWed joints and FLWed joints, respectively.

Phase Transformation Rule, Microstructure and Properties of JG590 High Strength Steel

2007 ◽  
Vol 561-565 ◽  
pp. 29-32
Author(s):  
Yong Feng ◽  
Wei Hua Sun
Keyword(s):  
Tensile Strength ◽  
Phase Transformation ◽  
Yield Strength ◽  
Cooling Rate ◽  
High Strength Steel ◽  
High Strength ◽  
Steel Plates ◽  
Transformation Rule ◽  
Cooling Rates ◽  
Iron And Steel

The phase transformation rule, microstructures and properties of JG590 high strength steel produced in Jinan Iron and Steel Co. ltd. have been investigated in this paper. When the chemical composition of steel are given, the cooling rates after finished rolling affect on the properties of steel greatly. The yield strength and tensile strength increasing, the elongation and reduction of area decreasing as increasing of cooling rates after rolling. The main cause is due to appearance and increasing of Bainite and Martensite other than Ferrite and Pearlite in room temperature. The finished rolling temperature have distinct effects upon the mechanical properties of steel plates. Finished rolling at different temperature with the 0.5°C/s cooling rate, the tensile strength vary in 599-698MPa, the yield strength changed from 412 MPa to 536MPa. The elongation is between 30.4-40.5%. But when finished rolling at different temperature with the 2.0°C/s cooling rate, the tensile strength vary in 747-784MPa, the yield strength changed from 441 MPa to 601MPa. The strength index can both meet the requirements of employ. But the elongation is only 18.7-24.5%. This is related with production of lots of Bainite microstructure more than 2°C/s cooling rate. In the procedure of manufacture of JG590 high steel, the quickly cooling rate should be avoided to keep suitable microstructure and good elongation and toughness.

Fatigue strength of non-load-carrying cruciform welded joints by a test maintaining maximum stress at yield strength

1994 ◽  
Vol 49 (4) ◽  
pp. 639-645 ◽  
Author(s):  
Ohta Akihiko ◽  
Matsuoka Kazuyoshi ◽  
Suzuki Naoyuki ◽  
Maeda Yoshio
Keyword(s):  
Fatigue Strength ◽  
Yield Strength ◽  
Welded Joints ◽  
Maximum Stress ◽  
Load Carrying

Welle-Nabe-Verbindungen 2016

2016 ◽  
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Yield Strength ◽  
Wird Eine ◽  
Hardened Steels

Festigkeitskennwerte für Wellen großer Abmessungen Kurzfassung Festigkeitskennwerte wie Zugfestigkeit, Streckgrenze und Wechselfestigkeit sind für Vergütungs- und Einsatzstähle stark größenabhängig. Im Nachweis der DIN 743 [9] wie auch der FKM-Richtlinie [11] liegen speziell für den technologischen Größeneinfluss unter Berücksichtigung des Halbzeugdurchmessers, der Wärmebehandlung und der Werkstoffzusammensetzung nur konservative Näherungslösungen vor. Der Bericht soll einen Beitrag zur Abschätzung der Wechselfestigkeit mithilfe des technologischen Größenfaktors K1(deff) für die Entwurfsphase von Wellen und Achsen liefern. Weiterhin wird eine Methode zur Berechnung der Wechselfestigkeit ausgehend von Messwerten am Bauteil vorgestellt, welche in der Nachrechnung zur Tragfähigkeit eingesetzt werden sollte. Abstract Strength values as tensile strength, yield strength and fatigue strength of quenched tempered and case hardened steels are highly subjected to the compone...

scholarly journals Implementation Of A Systematic Materials Selection Method In The Preliminary Design Of Propeller Shafts

2021 ◽  
Vol 93 (6s) ◽  
pp. 196-203
Author(s):  
Liane Roldo ◽  
◽  
Nenad Vulić ◽  
Keyword(s):  
Tensile Strength ◽  
Fatigue Strength ◽  
Impact Strength ◽  
Yield Strength ◽  
Stainless Steels ◽  
Selection Method ◽  
Preliminary Design ◽  
Propeller Shaft ◽  
Materials Selection ◽  
Versatile Tool

The materials selection charts also known as “Ashby” charts are a versatile tool in engineering design. The use of such material property charts is due to technical difficulties in specifying properties during the design of a complex and major component as in the case of a propeller shaft. In addition, the tool combines innovation, minimizes design failures and practicality to technology. The aim of the research is to present the methodology for selecting the most convenient material for a given shaft and its performance. Using a propeller shaft as showcase, the method is based on the analysis of the materials selection charts and of the material performance index of EDUPACK from GRANTA Design. The required properties may be: tensile strength, yield strength, fatigue strength, impact strength and resistance to corrosion, where not all of them are necessarily explicitly expressed. The Ashby charts, with their consistent results seem to be the proper tool for the eventual future proposal for the extension the UR M68 formula for the propeller shaft diameter to stainless steels.

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