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Journal articles on the topic 'Fatigue specimen'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Lim, Bok Kyu. "Analysis of Fatigue Life of SPR (Self-Piercing Riveting) Jointed Various Specimens Using FEM." Materials Science Forum 580-582 (June 2008): 617–20. http://dx.doi.org/10.4028/www.scientific.net/msf.580-582.617.

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Self-Piercing Riveting(SPR) is becoming an important joining technique for various material sheets and shapes, of automotive application. Fatigue behavior of SPR connections needs to be investigated experimentally and numerically to predict SPR fatigue lives. The simulations of various SPR specimens (Coach-Peel specimen, Cross-Tension specimen, Tensile-Shear specimen, Pure-Shear specimen) are performed to predict the fatigue life of SPR connections under different shape combinations. Finite element models of various SPR specimens are developed using a FEMFAT SPOT SPR pre-processor. The fatigue

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2

Gao, Jiewei, Guangze Dai, Junwen Zhao, Hengkui Li, Lei Xu, and Zhenyu Zhu. "Influence of Indentation on the Fatigue Strength of Carbonitrided Plain Steel." Advances in Materials Science and Engineering 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/492693.

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To study the influence of indentation on the fatigue strength of untreated and carbonitrided specimens of S38C steel, the fatigue limit of specimens with and without indentations was tested. Fracture surfaces were observed using scanning electron microscopy (SEM). The results show that the fatigue strength of the untreated specimen decreases with increasing dimension of indentation, without significant difference compared to the predicted results. Compared to the fatigue limit of the untreated specimen, those of the carbonitrided specimen and the carbonitrided specimen whose compound layer was

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3

Seok, Chang Sung, Jae Sil Park, Hyung Ick Kim, Young Min Lee, Won Hak Cho, and Weon Keun Song. "Evaluation of Fatigue Characteristic of a Real Waterworks Pipe." Key Engineering Materials 297-300 (November 2005): 2471–76. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2471.

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The fatigue characteristic of a material or a structure is derived from fatigue tests of standard specimens. However, many researches have reported that test results of standard specimens are very different from those of real structures or components. One reason for this difference is the constraint effects according to the geometrical difference. Therefore, to calculate more accurate fatigue life, the constraint effect must be considered by comparing test results of standard specimens with those of real structures or components. Another reason for this difference is the surface condition. All

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4

Iswanto, Priyo Tri, Shinichi Nishida, Nobusuke Hattori, and Yuji Kawakami. "Effect of Roller-Working on Fatigue Strength Improvement of Notched Structural Stainless Steel." Key Engineering Materials 306-308 (March 2006): 151–56. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.151.

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In order to study the effect of plastic deformation on fatigue behaviors of plastically deformed specimen, bending fatigue tests had been performed on notched deformed stainless steel specimens. Also pulsating fatigue tests were done on notched non-deformed specimens to evaluate the influence of mean stress on fatigue behavior of notched non-deformed specimens. The result showed that according to increase of deformation value, the fatigue limits of these specimens also significantly increase. Fatigue limit of rolled specimen does not linearly increase with increase in plastic deformation value

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5

Tanaka, Kazuto, and Masatoshi Uchiyama. "Effect of Vitamin-E Addition on Fatigue Crack Growth Property of Ultra High Molecular Weight Polyethylene." Key Engineering Materials 417-418 (October 2009): 93–96. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.93.

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In order to understand the influence of gamma-irradiation, accelerated aging and Vitamin-E addition on the fatigue crack growth properties of UHMWPE, fatigue crack growth tests of UHMWPE plates using compact tension specimens were carried out. The specimen conditioned in -irradiation and accelerated aging (the -aging specimen) has faster fatigue crack growth rate than the virgin specimens. For the Vitamin-E added specimen (the VE specimen), however, K threshold of the -aging VE specimen is smaller than that of the VE specimen. This result shows that the addition of Vitamin-E reduced the de

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6

Nai, Chang Gang, De Guang Shang, Chong Gang Ren, et al. "Effect of Laser Irradiation Parameters on Healing Fatigue Damage for Polycrystalline Copper Film." Applied Mechanics and Materials 217-219 (November 2012): 2270–76. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.2270.

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In this paper, the effect of laser parameters on fatigue life was investigated by laser irradiation for the undamaged and pre-damaged copper film specimens with thickness of 25μm. The results showed that the laser parameters have a great impact on the strengthening of original specimens and the healing of specimens with fatigue damage, and total fatigue life of the healed specimen with fatigue damage was longer than that of the strengthened original specimen. According to the obtained fatigue life results under different laser irradiation conditions, the optimal laser parameters were identifie

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7

Parvez, Mohammad Masud, Yitao Chen, Sreekar Karnati, Connor Coward, Joseph W. Newkirk, and Frank Liou. "A Displacement Controlled Fatigue Test Method for Additively Manufactured Materials." Applied Sciences 9, no. 16 (2019): 3226. http://dx.doi.org/10.3390/app9163226.

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A novel adaptive displacement-controlled test setup was developed for fatigue testing on mini specimens. In property characterization of additive manufacturing materials, mini specimens are preferred due to the specimen preparation, and manufacturing cost but mini specimens demonstrate higher fatigue strength than standard specimens due to the lower probability of material defects resulting in fatigue. In this study, a dual gauge section Krouse type mini specimen was designed to conduct fatigue tests on additively manufactured materials. The large surface area of the specimen with a constant s

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8

Loman, Miminorazeansuhaila, Mohamad Hafizi Zohari, and Fauziana Lamin. "Spectral Analysis of Fiber Bragg Grating Sensor on Glass Fiber Reinforced Polymer." Journal of Advanced Research in Applied Mechanics 130, no. 1 (2024): 72–79. https://doi.org/10.37934/aram.130.1.7279.

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An effective technique must be utilized to monitor composites' health as its application in engineering constructions grows to avoid sudden failure as it degrades. In line with that, this study analyses the progress of fatigue strain on GFRP specimens during fatigue tests using the FBG wavelength shifts parameter. Its purpose was to monitor the FBG wavelength shifts during three stages of fatigue test. Fatigue test specimens were firstly fabricated using the hand layup technique. Tensile and fatigue tests were conducted on the fabricated GFRP specimens. The FBG wavelength spectrums were acquir

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9

Zhang, Jian Yu, Chong Qiang Sun, Li Bin Zhao, Lei Peng, and Bin Jun Fei. "Experiment Research of Environment Effects on Fatigue Life of Carbon/Bismaleimide Composite Laminates with Central Hole." Key Engineering Materials 452-453 (November 2010): 525–28. http://dx.doi.org/10.4028/www.scientific.net/kem.452-453.525.

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The effects of humidity and ultraviolet radiation aging on fatigue properties of carbon/ bismaleimide composites and coating protection action were presented. Specimens with central hole are made of carbon/bismaleimide laminates. Compression-compression (C-C) fatigue tests under normal lab environment were operated respectively for four groups of specimen, (1) specimen under normal lab environment, (2) specimen under UV radiation aging with dryness, (3) specimen under UV radiation aging with moisture, and (4) specimen with coating under UV radiation aging with moisture. Variance analysis of ex

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10

Zuo, Yongji, Xianchao Li, and Tong Wang. "The effect of shot peening on the fatigue performance of the R-region in 2024-T351 machined components." Journal of Physics: Conference Series 3043, no. 1 (2025): 012062. https://doi.org/10.1088/1742-6596/3043/1/012062.

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Abstract To investigate the effect of shot peening on the fatigue performance of the R-region in 2024-T351 machined components, a specially designed test specimen was created. It can cause fatigue cracks to initiate in the R-region. The R-region of the specimen was subjected to shot-peening treatment, and fatigue tests were conducted on both the shot-peened and unpeened specimens. The fatigue quality of both the shot-peened and unpeened specimens was obtained by processing the test data. The DFR evaluation system was used to calculate the DFR values before and after shot peening. The results s

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11

Loanapakul, Teerawat, A. Rakngarm Nimkerdphol, Yuichi Otsuka, and Yoshiharu Mutoh. "Fatigue Behavior and Apatite Precipitation of Plasma-Sprayed HAp Coating on Commercially Pure Titanium Substrate in Simulated Body Fluid (SBF)." Advanced Materials Research 506 (April 2012): 66–69. http://dx.doi.org/10.4028/www.scientific.net/amr.506.66.

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Plasma sprayed Hydroxyapatite (HAp) coating on commercially pure titanium (cp-Ti) is widely used as implant materials. In this study, fatigue behavior of as-sprayed HAp top coat with HAp/Ti bond coat specimen under ambient environment (A-HTi) as well as under simulated body fluid, SBF, environment (I-HTi) at 36.5°C was investigated by four point bending fatigue test at a stress amplitude of 170 MPa under various frequencies. In order to investigate apatite precipitation during fatigue loading, the test specimen was immersed in SBF at 36.5°C during the fatigue test. For comparison, the test spe

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12

Masuda, Kenichi, Sotomi Ishihara, Hiroshi Shibata, and Noriyasu Oguma. "Effect of Rod-like Structure on Fatigue Life, Short Surface Crack Initiation and Growth Characteristics of Extruded Aluminum Alloy A2024 (Analysis via Modified Linear Elastic Fracture Mechanics)." Materials 14, no. 24 (2021): 7538. http://dx.doi.org/10.3390/ma14247538.

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In the Al alloy A2024-T3 extruded material, a rod-like structure is generated parallel to the extrusion direction. In this study, the effects of rod-like structures on fatigue crack initiation and growth behavior were comprehensively investigated. Two types of specimens were used in a fatigue experiment, in which the direction of the load stress amplitude was parallel (specimen P) and perpendicular (specimen V) to the rod-like structure. Based on the experimental and analytical results, the following findings were obtained regarding the fatigue life, location of crack initiation, and fatigue c

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13

Chandra, Devi, Chairil Hamdi, Hendery Dahlan, Eka Satria, Dendi Adi Saputra, and Adly Havendri. "Kaji Eksperimental Karakteristik Fatik Komposit Berpenguat 2 Lapis Serat Nenas dan Orientasi Serat 45 Derajat atau 90 Derajat." Jurnal Inovasi Rekayasa Mekanikal dan Termal 1, no. 2 (2023): 6–11. http://dx.doi.org/10.25077/inomet.1.2.6-11.2023.

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The aim of this study is to experimentally investigate the effects of fiber orientations on the fatigue strength, fatigue life and surface fracture of 2 ply Pineapple Leaf Fiber Composite. Fatigue test specimens with 45o and 90o fiber orientation are loaded using rotary bending fatigue test machine at several load levels. Fatigue strength and fatigue life are measured during fatigue test and fracture surface of fatigue specimens are observed using microscope. The results show that 2 ply Pineapple Leaf Fiber Composite with 45o fiber orientation have highest fatigue strength than 2 ply Pineapple

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14

MAKABE, CHOBIN, MD SHAFIUL FERDOUS, AKIMICHI SHIMABUKURO, and ANGGIT MURDANI. "EFFECT OF NaCl SOLUTION SPRAYING ON FATIGUE LIVES OF SMOOTH AND SLIT SPECIMENS OF 0.37% CARBON STEEL." Surface Review and Letters 24, no. 01 (2016): 1750011. http://dx.doi.org/10.1142/s0218625x17500111.

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The fatigue crack initiation life and growth rate are affected by experimental conditions. A corrosive environment can be created in a laboratory by means of dropping salt water onto the specimen surface, spraying chloride mist into the experimental chamber, etc. In the case of smooth specimens of some metals, fatigue life is shortened and the fatigue limit disappears under such corrosive experimental conditions. In this study, the effects of intermittent spraying of 3% NaCl solution-mist on corrosion fatigue behavior were investigated. The material used was 0.37% carbon steel. This is called

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15

Chang, S. T., W. J. Li, and L. W. Tsay. "Fatigue Crack Growth of Ti-15V-3Cr-3Sn-3Al Alloy." Advanced Materials Research 468-471 (February 2012): 1758–61. http://dx.doi.org/10.4028/www.scientific.net/amr.468-471.1758.

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In this study, the fatigue crack growth rates (FCGRs) of Ti-15V-3Cr-3Al-3Sn alloy aged in the temperature ranges from 426 to 593 oC for 8 hrs was determined at stress ration of 0.1 or 0.5. The results of fatigue crack growth tests revealed the FCGRs decreased with increasing aging temperature. Generally, the 426oC aged specimen had the highest FCGRs among the specimens being tested, regardless of stress ratio. It was noted obvious increase in FCGRs occurred for the 482oC aged specimen at stress ratio of 0.5. Fatigue fracture appearance of various specimens tested in air exhibited predominantly

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16

Morita, Shigeki, Nobuyoshi Ohno, Fujio Tamai, and Yuji Kawakami. "Crystallographic Orientation Dependence of Fatigue Crack Propagation Behavior in Rolled AZ31 Magnesium Alloy." Materials Science Forum 654-656 (June 2010): 723–26. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.723.

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This paper deals with fatigue crack propagation behavior of rolled AZ31B magnesium alloy. Two types of specimens with the loading axis parallel to rolling direction were machined; fatigue crack propagation direction was parallel to transverse direction (L-T specimen), and short transverse direction (L-S specimen). Fatigue crack propagation tests were performed with center cracked plate tension specimen with stress ratio R=0.1 and frequency of 10Hz at room temperature. Crack propagation rate of L-T specimen was approximately 10 times higher than that of L-S specimen. SEM-EBSD observations revea

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17

Zhao, Xiao. "Very Long Life Fatigue Behavior of Q345 Bridge Steel." Applied Mechanics and Materials 217-219 (November 2012): 407–10. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.407.

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Using the ultrasonic fatigue testing technique, specimens of Q345 bridge steel with two types of shape (round and plate) were performed in ambient air at room temperature with a stress ratio of R=-1. The very long life fatigue property of Q345 was studied and the initiation mechanisms of fatigue cracks were investigated and analyzed with SEM. The results show that the two types of specimen present different S-N curve characteristics in the region of 105-109 cycles. The S-N curve of round specimens shows continuously decreasing tendency, while the S-N curve of plate specimens has a steep decrea

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18

Pape, Sonja, Kangjin Lee, Cassie Castorena, and Y. Richard Kim. "Optimization of the Laboratory Fabrication of Small Specimens for Asphalt Mixture Performance Testing." Transportation Research Record: Journal of the Transportation Research Board 2672, no. 28 (2018): 438–50. http://dx.doi.org/10.1177/0361198118790845.

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The use of 38-mm-diameter small specimens for uniaxial dynamic modulus and cyclic fatigue asphalt mixture performance testing offers a significant opportunity to improve the efficiency of laboratory-fabricated specimen testing because multiple test specimens can be extracted per Superpave gyratory-compacted (SGC) sample. This study seeks to optimize the procedure used for the extraction of small specimens from SGC samples for dynamic modulus and cyclic fatigue tests. To this end, small cylindrical specimens were cored horizontally and vertically from SGC samples and subjected to performance te

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19

Kido, Yuta, Akinobu Nakamura, Masayuki Tsushida, Hiromoto Kitahara, and Shinji Ando. "Orientation Dependence on Fatigue Fracture Behavior of Pure Mg Single Crystals." Materials Science Forum 941 (December 2018): 1507–10. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1507.

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It is well known that magnesium (Mg) shows anisotropic fatigue behavior. However, the fatigue mechanisms have yet to be elucidated. The relationships between crystal orientations and crack initiation behavior in Mg single crystals were investigated by uniaxial tension-compression fatigue tests. Three types of round-bar specimens were prepared. The lording direction of AD, BC and EF specimen were [110], [100] and [0001], respectively. Fatigue tests were carried out with the stress ratio R=-1 and the frequency of 10Hz at room temperature in laboratory air. At stress amplitude (σa) over 40 MPa, f

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20

Singh, Abhendra K., Volodymyr Sabelkin, and Shankar Mall. "Fatigue behavior of double-edge notched oxide/oxide ceramic matrix composite in a combustion environment." Journal of Composite Materials 51, no. 26 (2017): 3669–83. http://dx.doi.org/10.1177/0021998317692655.

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Tension–tension fatigue tests in a combustion environment were performed on double-edge notched oxide/oxide ceramic matrix composite specimens. The composite, designated as N720/A, constituted woven 0°/90° Nextel™720 fibers in alumina matrix. Monotonic tensile and cyclic loads at a frequency of 1 Hz and a stress ratio of 0.05 were applied on the specimens in a combustion environment. The maximum specimen temperature due to combustion flame impingement in the notch region was 1250 ± 50℃. A stiffness reduction of less than 10% evaluated for the run-out specimens showed the harsh combustion envir

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21

Zhou, Cong Ling. "Effect of Pre-Strain and Roller Working on Torsional Fatigue Properties of a Structural Steel." Advanced Materials Research 295-297 (July 2011): 2227–30. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.2227.

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In this study, fatigue tests have been performed using two kinds of specimens made of 25 steel. One is pre-strained specimen with pre-strain ratio changing from 2% to 8% by tension, the other is roller worked with deformation of 0.5 mm and 1.0 mm in diameter direction. In the case of pre-strained specimen, the fatigue limit increases according to increase of tensile pre-strain, the fatigue limit of 8% pre-strained specimen is 25% higher than that of non-pre-strained one; in the case of roller worked specimen, the fatigue limit of R05 and R10 is 126% and 143% to that of non-roller worked specim

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22

Iswanto, Priyo Tri, Shin-ichi Nishida, Nobusuke Hattori, and Ichiro Usui. "Influence of residual stress and mean stress on fatigue strength improvement of austenitic stainless steel." Strength, Fracture and Complexity: An International Journal 4, no. 2 (2006): 117–27. https://doi.org/10.3233/sfc-2006-076.

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This paper refer to the effect of compressive mean stress, work-hardening, microstructure improvement and compressive residual stress generated by roller-working on fatigue properties of austenitic stainless steel. Pulsating fatigue tests have been performed on the specimens with and without surface deformation. The results showed that high compressive mean stress specimens have higher fatigue strength than that of low compressive mean stress ones. Surface replica observation results show that compressive mean stress is responsible for delaying of fatigue crack initiation and preventing fatigu

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23

Tayebali, Akhtarhusein A., John A. Deacon, and Carl L. Monismith. "Development and Evaluation of Dynamic Flexural Beam Fatigue Test System." Transportation Research Record: Journal of the Transportation Research Board 1545, no. 1 (1996): 89–97. http://dx.doi.org/10.1177/0361198196154500112.

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Although both mix variables and environmental variables are known to affect the fatigue response of asphalt-aggregate mixes, other factors—including specimen fabrication procedure and test equipment and procedures—are equally important. The development of a dynamic flexural beam fatigue test system is described, and the effects of specimen compaction method and equipment type on the precision of in situ fatigue lives of asphalt-aggregate mixes predicted by using laboratory strain-life relationships are discussed. Results indicate a coefficient of variation of 41 percent in fatigue life for the

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24

Hadi, Syamsul, Anggit Murdani, Sudarmadji Sudarmadji, et al. "Effect of Material Type and Minimum Diameter of Specimens on the Fatigue Life." Logic : Jurnal Rancang Bangun dan Teknologi 21, no. 3 (2021): 205–11. http://dx.doi.org/10.31940/logic.v21i3.205-211.

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The obstacle faced during the fatigue test is the waiting time which is quite long and inefficient, especially for test specimens made of ductile metal with waiting times of up to several days. The research method includes reducing the specimen radius to obtain a flexural stress approaching 400 MPa which was originally 229 MPa from a radius of 254 mm to 240 mm with the results of turning the original specimen obtained a minimum diameter of 8.6 mm is reduced to 7.3 mm at a maximum loading of 10 kg. Results of the research are brass specimens C3604BD type with a minimum diameter of 8.6 mm at a f

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25

Mizuno, Satoshi, Toshifumi Kakiuchi, and Yoshihiko Uematsu. "Fatigue Test of Small Sized AZ31 Magnesium Alloy Using Micropillar Specimen." Key Engineering Materials 525-526 (November 2012): 165–68. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.165.

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The bending fatigue tests were performed using the small sized specimens of AZ31 magnesium alloy fabricated by the focused ion beam (FIB) processing to investigate the scale effect on the fatigue behavior. For the fatigue test of the small sized specimens, the fatigue testing apparatus was constructed by the piezo actuator and the high-resolution microscope for controlling the very small displacement. The specimen was micropillar-shaped with the rectangular cross section of 3μm x 8μm and the height of 40μm. The fatigue strengths of the small sized specimens were higher than those of the bulk s

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26

Zhang, Zhenxian, Zhongwen Li, Han Wu, and Chengqi Sun. "Size and Shape Effects on Fatigue Behavior of G20Mn5QT Steel from Axle Box Bodies in High-Speed Trains." Metals 12, no. 4 (2022): 652. http://dx.doi.org/10.3390/met12040652.

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In this paper, the axial loading fatigue tests are at first conducted on specimens ofG20Mn5QT steel from axle box bodies in high-speed trains. Then, the size and shape effects on fatigue behavior are investigated. It is shown that the specimen size and shape have an influence on the fatigue performance of G20Mn5QT steel. The fatigue strength of the hourglass specimen is higher than that of the dogbone specimen due to its relatively smaller highly stressed region. Scanning electron microscope observation of the fracture surface and energy dispersive X-ray spectroscopy indicate that the specimen

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27

Hasebe, Tadashi, Masao Sakane, and Masateru Ohnami. "High Temperature Low Cycle Fatigue and Cyclic Constitutive Relation of MAR-M247 Directionally Solidified Superalloy." Journal of Engineering Materials and Technology 114, no. 2 (1992): 162–67. http://dx.doi.org/10.1115/1.2904156.

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This paper investigates the effect of solidification direction on cyclic constitutive relation and low cycle fatigue life for a directionally solidified (DS) superalloy Mar-M247LC at 1173 K in air. Strain controlled push-pull low cycle fatigue tests were carried out for three kinds of specimens of which loading direction was 0, 45 and 90 deg to DS axis. The 0 deg specimen exhibited the largest fatigue strength, the 45 deg specimen the smallest and the 90 deg specimen the intermediate. The difference in the fatigue strength due to the loading direction was discussed in detail from the viewpoint

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28

Morishige, K., and Hiroshi Noguchi. "Effect of Mean Stress on Fatigue Strength of Non-Combustible Magnesium Alloy." Key Engineering Materials 353-358 (September 2007): 170–73. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.170.

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Effect of mean stress on fatigue strength at N=107 of non-combustible magnesium alloy AMX602B(X=Ca) was investigated. Rotating bending fatigue test and tension-compression fatigue test were carried out on specimens with a small hole or crack. It was clarified that the fatigue strength at N=107 of the specimen with the small hole was about 30-150% higher than that of the specimen with the small crack within the range of σm=0~100MPa. This is the reason why the fatigue strength at N=107 of the specimen with the small hole can be not threshold condition for crack propagation but crack initiation.

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Goto, Masahiro, Takaei Yamamoto, Junichi Kitamura, et al. "Growth Rate of Small Surface-Cracks in Age Hardening Cu-Ni-Si Alloy under Cyclic Stressing." Key Engineering Materials 827 (December 2019): 216–21. http://dx.doi.org/10.4028/www.scientific.net/kem.827.216.

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Stress-controlled fatigue tests were conducted on round-bar specimens to understand the fatigue behavior of precipitate-strengthened Cu–6Ni–1.5Si alloy. The cracks were initiated at the grain boundaries, followed by growth along the crystallographic slip planes in the adjacent grains. The crack growth data of plain specimens exhibited a large scatter, resulting in a difficulty of the measurement of crack growth rate. To evaluate the small-crack growth rate of the alloy, the plain specimens with a small blind hole as the crack starter were fatigued. The crack growth rate of small cracks from th

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30

Yang, Jun, Bo Li, Qiang Jia, Yuan Xing Li, Ming Yue Zhang, and Hui Chen. "Influence of Stress Concentration on Fatigue Property of Welded Joints of 5083 Aluminum Alloy." Applied Mechanics and Materials 456 (October 2013): 451–55. http://dx.doi.org/10.4028/www.scientific.net/amm.456.451.

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Fatigue test of the welded joint of 5083 aluminum alloy with smooth and height of specimen and the weld zone than the high test measurement and theoretical stress concentration coefficient calculation, the weld reinforcement effect of stress concentration on the fatigue performance of welded joints. The results show that: Smooth tensile strength of specimens for 264MPa, fatigue strength is 95MPa, the tensile strength of the 36%. Higher tensile strength of specimens for 320MPa, fatigue strength is 70MPa, the tensile strength of the 22%. Higher specimen stress concentration coefficient is 1.64,

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31

Tsurudome, Masaki, Hiroyuki Yamada, Nagahisa Ogasawara, and Keitaro Horikawa. "Effect of Pre-Fatigue Deformation under Humid Environment on Impact Tensile Properties in 7075 Aluminum Alloys." Applied Mechanics and Materials 566 (June 2014): 128–33. http://dx.doi.org/10.4028/www.scientific.net/amm.566.128.

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The effect of pre-fatigue deformation in a humid environment on the impact tensile properties of 7075 aluminum alloys was investigated. An impact tensile test of the pre-fatigue deformed specimens was performed by means of the Split Hopkinson pressure bar method. Within the author’s set of experiments, the flow stress was unaffected by the pre-fatigue deformation. On the other hand, it was shown that the ductility of the pre-fatigue specimen was slightly lower than that of the non-fatigue specimen in the impact test. Additionally, the pre-fatigue specimen in a high-humidity environment had a l

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32

Belkhiria, Salma, Adel Hamdi, and Raouf Fathallah. "Strain-based criterion for uniaxial fatigue life prediction for an SBR rubber: Comparative study and development." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 234, no. 7 (2020): 897–909. http://dx.doi.org/10.1177/1464420720913595.

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This work proposes an engineering approach to investigate the fatigue lifetime of styrene–butadiene rubber under uniaxial loadings. Two specimen geometries are considered: axisymmetric sample AE2 and diablo sample AE42. Specimens are cycled with a sinusoidal waveform at 5 Hz for different maximum displacement values and a zero load ratio. The various damage parameters, commonly used for fatigue life calculation, are reviewed and discussed. Then fatigue models with diverse damage parameters are generated from the fatigue lives experimentally observed for specimen AE2. The efficiency of each pre

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33

Callaghan, Mark D., S. R. Humphries, M. Law, Hui Jun Li, and Wing Y. Yeung. "Evaluation of High Temperature Fatigue Behaviour of P22 by Miniature Specimen Testing." Materials Science Forum 638-642 (January 2010): 3937–42. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.3937.

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Miniature specimen testing to evaluate mechanical properties, presents a novel opportunity to undertake structural integrity assessments of in-service power generation components, by removing only a very small volume of material. In this study, high temperature fatigue testing of P22 steel was undertaken and a number of fatigue properties determined using a miniature specimen testing methodology. Good comparisons were observed between fatigue properties determined by miniature specimens and the more established standard-sized specimen testing reported in literature.

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34

Namjoshi, S. A., V. K. Jain, and S. Mall. "Effects of Shot-Peening on Fretting-Fatigue Behavior of Ti-6Al-4V." Journal of Engineering Materials and Technology 124, no. 2 (2002): 222–28. http://dx.doi.org/10.1115/1.1448323.

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The effects of shot-peening on the fretting fatigue behavior of titanium alloy, Ti-6Al-4V were investigated. Specimens were shot-peened as per AMS 2432 standard. X-ray diffraction analysis measured a maximum compressive stress of 800 MPa at the specimen surface, which reduced to zero at a depth of 188 μm. The compensatory residual tensile stress in the specimen was estimated using a curve fitting technique, the maximum value of which was found to be 260 MPa at a depth of 255 μm. Fretting fatigue tests were conducted at room temperature at a cyclic frequency of 200 Hz. Scanning electron microsc

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Miura, Taku, Takayuki Sakakibara, Takanori Kuno, Akira Ueno, Shoichi Kikuchi, and Tatsuo Sakai. "Interior-Induced Fracture Mechanism of High Cleanliness Spring Steel (JIS SWOSC-V) in Very High Cycle Regime." Key Engineering Materials 664 (September 2015): 209–18. http://dx.doi.org/10.4028/www.scientific.net/kem.664.209.

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In order to investigate the interior-induced fatigue crack propagation behavior of high cleanliness valve spring steel (JIS SWOSC-V), rotating bending fatigue tests were performed for various kinds of specimens with different hardness or surface finishings. The harder specimen with higher compressive residual stress showed longer fatigue life. The electrochemical polished specimen pre-treated with shot peening showed almost same fatigue life as the shot-peened specimen in spite of the difference in surface roughness. After fatigue tests, fracture surfaces were observed using a scanning electro

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Huang, Yongjie, Zhidong Guan, Haitao Li, Xu Yang, Zengshan Li, and Ying Sun. "Effects of chamfering, cold expansion, bolt clamping, and their combinations on fatigue life of aluminum–lithium alloy single plate." Advances in Mechanical Engineering 10, no. 1 (2018): 168781401775068. http://dx.doi.org/10.1177/1687814017750681.

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The objective of this study was to establish the effects of cold expansion, chamfering, bolt clamping, and their combinations on the fatigue life of an aluminum–lithium alloy single plate. Fatigue tests were conducted to quantify the anti-fatigue effects of the different techniques. A scanning electron microscope was used to perform fracture analyses of the used specimens, and the residual stresses were measured using an X-ray diffraction device. In addition, three-dimensional finite element models of the specimens were established and used to characterize their stress states, and the Smith–Wa

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Iswanto, Priyo Tri, Shin‐ichi Nishida, and Nobusuke Hattori. "Effect of roller‐working and mean stress on fatigue strength of ferritic stainless steel." Strength, Fracture and Complexity: An International Journal 2, no. 3 (2004): 127–35. https://doi.org/10.3233/sfc-2004-035.

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This paper covers investigations of the effect of mean stress on fatigue properties of non‐deformed specimens and the effect of roller‐working on fatigue properties of plastically deformed specimens of ferritic stainless steel. In order to evaluate the effect of mean stress on fatigue strength improvement, tensile‐compressive fatigue test have been performed on non‐deformed specimens. In order to study the effect of plastic deformation due to roller‐working on fatigue properties of deformed specimens, rotating bending fatigue test have been done on plastically deformed specimens in several deg

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Noda, Hiroshi, and Hisao Matsunaga. "Fatigue Crack Growth Acceleration Due to Hydrogen in Type 304 Stainless Steel." Key Engineering Materials 345-346 (August 2007): 319–22. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.319.

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In order to investigate the influence of hydrogen on the fatigue strength of Type 304 meta-stable austenitic stainless steel, specimens were cathodically charged with hydrogen. Hydrogen-charging led to a marked decrease in fatigue crack growth life. Crack growth paths and slip bands morphology were changed by the hydrogen-charging. To elucidate the mechanism of the degradation by hydrogen, the surfaces of both the uncharged and charged specimens were examined by the hydrogen microprint technique (HMT). In the uncharged specimen, no hydrogen emission from specimen surface was observed. On the o

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Makabe, Chobin, Takuya Nakayama, Masaki Fujikawa, Kazuo Arakawa, and Ding Ding Chen. "Effect of Specimen Thickness on Fatigue Limit in Carbon Composites." Advanced Materials Research 1110 (June 2015): 13–18. http://dx.doi.org/10.4028/www.scientific.net/amr.1110.13.

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The fracture behavior and fatigue limit in notched specimens of C/C composites were investigated. Also, the effect of specimen thickness on fatigue limit was discussed. Two plates of different thicknesses of plates of C/C composites using fine-woven carbon fiber laminates with α=0°/90° direction were used for testing. α is the angle between the carbon fiber direction and specimen axis. The crack growth behavior and failure mechanism of specimens are derived from the shear damage in the fiber bundle and matrix. Slits of several sizes were cut on both sides of a test section and different geomet

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He, Li Sha, and Nobusuke Hattori. "Bending Fatigue Strength Evaluation of Notched Structural Steel Sheet Repaired by Bolt." Key Engineering Materials 452-453 (November 2010): 25–28. http://dx.doi.org/10.4028/www.scientific.net/kem.452-453.25.

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The present investigation attempts to evaluate the improvement of working by bolt on the fatigue limit of structural steel sheets with drilling a circular hole. The material used in this study is structural steel (JIS SM400A). And the specimens are identified to two types of the non-worked specimen and the worked specimen. The results obtained in this study can be summarized as follows: (1) The fatigue limit of worked specimens increases than that of non-worked specimen. Futhermore, there has a suitable value of the torque for improving the fatigue limits. (2) The reasons of enhancing the fati

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Yeh, Shu Hung, Liu Ho Chiu, Shou Chi Lin, and Yeong Tsuen Pan. "AISI H13 Hot-Work Steel with Hard Chromium Plating Thermal Fatigue Behavior Evaluation." Advanced Materials Research 849 (November 2013): 8–13. http://dx.doi.org/10.4028/www.scientific.net/amr.849.8.

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A hard-coating on hot work tool steel can be used to obtain higher corrosion resistance, as well as better wear resistance. This study investigates the thermal fatigue performance of AISI H13 hot work tool steel with and without hard chromium plating. Treated specimens were characterized using microstructural analysis, X-ray diffraction analysis and microhardness measurement. The thermal fatigue test is based on cyclic induction heating and water cooling. The specimen was heated to the maximum surface temperature of 670°C followed with water injection to bring the specimen down to a minimum te

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da Costa, Pedro R., Henrique Soares, Luís Reis, and Manuel Freitas. "Ultrasonic fatigue testing under multiaxial loading conditions on a railway wheel." MATEC Web of Conferences 300 (2019): 18003. http://dx.doi.org/10.1051/matecconf/201930018003.

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Ultrasonic fatigue testing is a relative recent fatigue methodology that uses resonant principles for the induction of stress cycles in a specific designed material specimen. This experimental method can apply very high cycle frequency, the most common frequency being 20 kHz, and was created with the main purpose of studying material fatigue life in the Very High Cycle Fatigue regime between 107 and 109 cycles with a higher performance of time and energy wise in comparison to conventional servo-hydraulic machines. In this study an improvement of an already built multiaxial ultrasonic fatigue m

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Gaerke, J., X. Zhang, and Z. Wang. "Life enhancement of fatigue-aged fastener holes using the cold expansion process." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 214, no. 5 (2000): 281–93. http://dx.doi.org/10.1243/0954410001532060.

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This paper examines the benefits of cold expanding fastener holes at various stages of the fatigue life in a 2024-T351 low-load transfer joint. The specimens were pre-cycled to 25, 50 and 75 per cent of the baseline fatigue life of a non-expanded specimen and then cold expanded prior to cycling to final failure. The experimental test was designed to provide a close comparison with standard maintenance practices for aircraft structures and used the FALSTAFF spectrum which was derived from actual flight loading. The test results have indicated that part-life cold expansion can provide substantia

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Hasani Monfared, Banan, and Alireza Sedaghat. "Experimental investigation of impact damage on repetitive loading tolerance in metal-fiber multilayers." International Journal of Engineering & Technology 8, no. 4 (2019): 527. http://dx.doi.org/10.14419/ijet.v8i4.28763.

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Fiber is not sensitive to fatigue in some fiber-metal multilayers. They leave a large part of the load through the cracks and prevent the crack from opening. Due to this prevention, the opening in GLARE is less than that of the metals. Unlike what is observed in metals, concentration factor of crack tip is not fully influenced by increase in crack length. Hence, this study uses the experimental method to examine post-impact fatigue behavior of glass fiber-reinforced metal composites, known as GLARE. The GLARE made in this study was produced by autoclave in three types of GLARE 1.2-3, GLARE 1.2

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Yang, Seung Yong. "Analysis of Fatigue Crack Growth in Weld Specimen Using Three-Dimensional Cohesive Zone Model." Key Engineering Materials 321-323 (October 2006): 674–77. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.674.

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Three-dimensional cohesive zone model was used to simulate the fatigue crack growth of a weld specimen. Damage accumulation was accounted for using a constitutive model. A surface along which the fatigue crack would grow was assumed along the symmetric plane of the specimen and the cohesive elements were applied on the surface. Tensile tests of weld and parent specimens were simulated by the finite element method. Results of fatigue crack growth for the weld and parent specimens were compared and the effect of changing a constitutive parameter on the fatigue crack growth behavior was also chec

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Sakamoto, Takahiro, Shinji Ando, Hiromoto Kitahara, Masayuki Tsushida, and Hideki Tonda. "Crack Orientation Dependence for Fatigue Behavior of Titanium Single Crystals." Key Engineering Materials 345-346 (August 2007): 351–54. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.351.

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In this present study, the fatigue behavior of titanium single crystals containing cracks growing in different crystallographic orientations has been investigated. To investigate fatigue fracture behavior of small single crystals, plain bending fatigue test method for thin sheet specimen was developed. One end of the sheet specimen is fixed at a voice coil of the loudspeaker and the other end is set free. A bending mode resonance occurs in the specimen due to forced vibration at the fixed end. In A-specimen, the notch plane and the direction are (11-20) and [1-100], respectively, the crack pro

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Konishi, Yutaka, Takamoto Itoh, Masao Sakane, Fumio Ogawa, and Hideyuki Kanayama. "Low Cycle Fatigue Test of Lead Free Solders Using Small Sized Specimen." Key Engineering Materials 734 (April 2017): 194–201. http://dx.doi.org/10.4028/www.scientific.net/kem.734.194.

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This paper investigates the fatigue results in low cycle fatigue region obtained from a miniaturized specimen having a 6mm gage length, 3mm diameter and 55mm total length. Fatigue tests were performed for two type lead-free solders using horizontal-type electrical servo hydraulic push-pull fatigue testing machine. Materials employed were Sn-3.0Ag-0.5Cu and Sn-5Sb. The results from Sn-3.0Ag-0.5Cu were compared with those obtained using a bulk specimen in a previous study. Relationship between strain range and number of cycles to failure of the small-sized specimen agreed with those of the bulk

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Yan, Nu, I. Lee, Riichi Murakami, Daisuke Yonekura, J. Sun, and Satoshi Fukui. "Influence of Plasma Radical Nitriding on Fatigue Properties of SCM435 Steel." Key Engineering Materials 353-358 (September 2007): 266–69. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.266.

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The effect of plasma radical nitriding treatment on fatigue properties of SCM435 steel in super long life region was investigated. Fatigue tests were carried out using a dual-spindle rotating bending fatigue-testing machine at room temperature in air for the specimens nitrided at 773 K and 823 K for 3 hrs. The fatigue strength of nitrided specimen was greater than that of un-nitrided specimen and the crack initiation mode changed from the surface cracking of un-nitrided specimen to the subsurface cracking of nitrided specimen. Hardening layer and compressive residual stress were formed by nitr

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Zhao, Yong Xiang, and Bing Yang. "Scale-Induced Effects on Fatigue Properties of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames." Advanced Materials Research 118-120 (June 2010): 59–64. http://dx.doi.org/10.4028/www.scientific.net/amr.118-120.59.

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Scale-induced effect is investigated on the fatigue properties to the grade B cast steel for China railway rolling wagon bogie frame. Three kinds of structure-like specimens with production structural surfaces and different scales were fatigued in a manner of group tests at same stressing amplitude. Their fatigue properties are compared with those of material specimens. Fracture surface observations reveal that the fatigue cracks were initiated from the material casting shrinking cavities with/or hot ties. Distinct fatigue striations, river-like flowers, and second cracks appeared in perpendic

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Soares, H., P. Costa, M. Freitas, and L. Reis. "Fatigue life assessment of a railway wheel material under HCF and VHCF conditions." MATEC Web of Conferences 165 (2018): 09003. http://dx.doi.org/10.1051/matecconf/201816509003.

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Fatigue damage and life assessment is still an issue and a challenge nowadays. Many different tests can be performed for the assessment of fatigue properties of any given material. In the present study a worn out railway wheel goes under uniaxial fatigue analyses for the high cycle and very high cycle fatigue regimes through the use of a conventional hydraulic machine and an ultrasonic fatigue test, both with a stress ratio of R=-1. For every used specimen, a life cycle is obtained for the corresponding induced specimen and the data is afterwards plotted. All the fracture surfaces of all faile

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