Presentation on literature review

Shailesh Patel (1400807090012) Guide: M J Zinzuvadia sir V H Chaudhari

BIRLA VISHVAKARMA MAHAVIDYALAYA

Definition• Fatigue life Prediction of Upper beam of

Press Brake Machine under Uniaxial loading

Introduction

• Energy mission PVT LTD manufacture Hydraulic press brake bending machine ranging from 20MT to 700MT with the length 1250mm to 6000mm.

• They manufacture different types of punches regarding to the Air bending application of EN-8 which have tensile properties between 500-800 N/mm^2 .

• Air bending is defined as three points of contact with the part to form a straight line angle.

Why it is to be done• Crack initiation and growth of Upper Beam due to Variable amplitude Loading.

• Fatigue life prediction of upper beam

• Influence of ram and bed deflection on the angular precision of the workpiece.

Title:

Fatigue life prediction of a heavy vehicle steel wheel under radial loads by using finite element analysis

• M.M. Topaç , S. Ercan b , N.S. Kuralay

• Engineering Failure Analysis 20 (2012) 67–79

• Work detail : • fatigue life estimation on the air ventilation holes of a wheel in dynamic

radial loading life S-N approach ..• The estimated S–N diagram was constructed using the ultimate tensile

strength of the processed wheel disc material which was determined via Vickers hardness tests.

• The effects of factors such as surface roughness, size and stress concentration were also taken into account using endurance-limit modifying factors also known as Marin factors.

• conclusion:• Local thickness, tc and the cross-sectional radius, rc at the critical regions

was applied. Stress analyses showed that by using this solution, it is possible to decrease the equivalent von Mises stress at these regions.

• Significance:• fatigue life prediction using Ultimate tensile strength of Processed material

which relative to hardness.

Title:

Fatigue life prediction of Parabolic leaf spring under variousroad conditions

• Y.S. Kong , M.Z. Omar , L.B. Chua , S. Abdullah

• Engineering Failure Analysis 46 (2014) 92–103

• Work detail : • simulate the fatigue life of a parabolic leaf spring design under variable

amplitude loading (VAL).• VALs signal were gathered through measurements from various road

conditions such as highway, curve mountain road and rough rural area road.• fatigue life of particular leaf spring design was predicted using finite

element (FE) stress–strain model together with VALs signal as load input.

• conclusion:• The experimental strain data collection was determined based on the

maximum stress and strain region

• Significance:• FE method has provided the critical region of the parabolic leaf spring

where the strain gauge was attached. Strain signal represents the parabolic leaf spring loading history when the bus travels on the particular road.

Title:

Fatigue Life Design of Components under Variable AmplitudeLoading with Respect to Cyclic Material Behaviour

• Matthias Hell, Rainer Wagener, Heinz Kaufmann, Tobias Melz,

• 3rd International Conference on Material and Component Performance under Variable Amplitude Loading, VAL2015

• Procedia Engineering 101 ( 2015 ) 194 – 202

• Work detail : • Material based approach considers the elastic-plastic material behaviour

through a combination of the local and the global approach, improving thetransfer ability of material fatigue properties to arbitrary geometries while reducing the numerical effort for fatigue life estimation.

• Conclusion:• Huge test programmes for the material characterisation in the nominal

stress concept including assessment of the influences of stress concentrations, mean stresses and other factors can be avoided by using material based component S-N-curves.

• Significance:• comparison between different fatigue design concepts, a new approach was

developed, combining the advantages of both global and local approaches.

Title:

Loading sequence effect on fatigue life of Type 316 stainless steel

• Masayuki Kamaya , Masahiro Kawakubo

• International Journal of Fatigue 81 (2015) 10–20

• Work detail : • The fatigue life reduction due to the loading sequence effect could be

assessed conservatively by determining the allowable number of cycles for effective stress amplitude.

• conclusion:• It was concluded that the margin of 1.3–2.3 should be considered in the

number of cycles of the DFC(design fatigue curve) to take account of the loading sequence effect conservatively.

• Significance:• strain-controlled fatigue tests, the H–L sequence two-step, repeating two-

step and periodical overload tests showed shorter fatigue life than that predicted by the LDR. On the other hand, the L–H sequence two-step test exhibited longer fatigue life.

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