Thermal Fatigue of a Nickel-Base Alloy

1965 ◽  
Vol 87 (1) ◽  
pp. 237-244 ◽  
Author(s):  
A. E. Carden
Keyword(s):  
Plastic Strain ◽  
Thermal Fatigue ◽  
Strain Energy ◽  
Thermal Stresses ◽  
Base Alloy ◽  
Fatigue Tests ◽  
Fatigue Data ◽  
Plastic Strain Energy ◽  
Nickel Base ◽  
Good Agreement

The results of conventional (Coffin-type) thermal-fatigue tests of Hastelloy N are reported. The plastic-strains induced by thermal stresses ranged from a hundred micro-units to more than ten-thousand microunits and correlated well with fatigue life. The slope of the plastic-strain fatigue relationship differs from the conventional slope of minus one half being about −0.9. The thermal-fatigue data are in good agreement with the isothermal (1300 and 1500 deg F) strain fatigue data available on this alloy. The same plastic-strain criterion for failure describes the results of tests where plastic flow is produced by yielding and a combination of yielding and stress relaxation. The plastic-strain energy per cycle versus life suggests that a constant plastic work to failure exists for this alloy. The implications of such a criterion are discussed.

Plastic Strain Energy in Fatigue Failure

1984 ◽  
Vol 106 (4) ◽  
pp. 342-347 ◽  
Author(s):  
F. Ellyin ◽  
D. Kujawski
Keyword(s):  
Plastic Strain ◽  
Strain Energy ◽  
Fatigue Crack Initiation ◽  
Cyclic Creep ◽  
Low Alloy Steel ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Plastic Strain Energy ◽  
Cyclic Plastic Strain ◽  
Good Agreement

In this paper the cyclic plastic strain energy of the A-516 Gr. 70 carbon low-alloy steel during fully reversed constant strain or stress-controlled cycles is discussed. A relationship is proposed which can be used to determine the plastic strain energy per cycle for a non-Masing material for various stress ranges during the entire life cycle. Predictions of the proposed method are in good agreement with the experimental data. The variation of the plastic strain energy per cycle and cyclic creep during the life of fully reversed stress-controlled tests is also presented. It is shown that the cyclic creep strain affects the fatigue crack initiation period and consequently the amount of the total absorbed plastic strain energy to failure.

An analysis based on plastic strain energy for bilinearity in Coffin-Manson plots in an AlLi alloy

1994 ◽  
Vol 30 (12) ◽  
pp. 1497-1502 ◽  
Author(s):  
N.Eswara Prasad ◽  
A.G. Paradkar ◽  
G. Malakondaiah ◽  
V.V. Kutumbarao
Keyword(s):  
Plastic Strain ◽  
Strain Energy ◽  
Plastic Strain Energy

Plastic Strain Energy Model for Rock Salt Under Fatigue Loading

2018 ◽  
Vol 31 (3) ◽  
pp. 322-331 ◽  
Author(s):  
M. M. He ◽  
N. Li ◽  
B. Q. Huang ◽  
C. H. Zhu ◽  
Y. S. Chen
Keyword(s):  
Plastic Strain ◽  
Rock Salt ◽  
Strain Energy ◽  
Fatigue Loading ◽  
Energy Model ◽  
Plastic Strain Energy

Modification of Plasma Spurt Spraying on Improving Fatigue Property of Welded Joint

2014 ◽  
Vol 556-562 ◽  
pp. 494-497
Author(s):  
Xiao Hui Zhao ◽  
Yu Liu
Keyword(s):  
Residual Stress ◽  
Fatigue Strength ◽  
Welded Joint ◽  
Base Alloy ◽  
Fatigue Property ◽  
Fatigue Tests ◽  
Test Results ◽  
Residual Stress Field ◽  
Modification Method ◽  
Nickel Base

The present paper introduces a modification method of welded joint, plasma spurt spraying (MPSS), for improving the fatigue life of welding structure. Nickel-base alloy powder was used to spray the welded joint of Q235B steel. The high cycle fatigue tests of specimens treated by MPSS were carried out to obtain the S-N curves. Meanwhile, numerical simulation was performed to obtain the residual stress field after spraying. Test results show that the fatigue strength of welded joint by MPSS is higher than that of as-welded joint. Based on the test results and simulation results, it can be concluded that MPSS improves fatigue strength mainly through the decrease of stress concentration and residual stress.

Effect of plastic strain energy density on polymer optical fiber power losses

2006 ◽  
Vol 31 (7) ◽  
pp. 879 ◽  
Author(s):  
Yung-Chuan Chen ◽  
Jao-Hwa Kuang ◽  
Li-Wen Chen ◽  
Hua-Chun Chuang
Keyword(s):  
Energy Density ◽  
Plastic Strain ◽  
Optical Fiber ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Power Losses ◽  
Polymer Optical Fiber ◽  
Plastic Strain Energy

Experimental Study on Flexural and Fatigue Property of Steel Fiber Reinforced Prestressed Concrete Slab

2012 ◽  
Vol 166-169 ◽  
pp. 1083-1086
Author(s):  
Shi Yue Wang ◽  
Jie Hou ◽  
Bi Huang
Keyword(s):  
Flexural Strength ◽  
Plastic Strain ◽  
Strain Amplitude ◽  
Prestressed Concrete ◽  
Strain Energy ◽  
Steel Fiber ◽  
Concrete Slab ◽  
Volume Ratio ◽  
Fiber Volume ◽  
Plastic Strain Energy

The flexural strength of steel fiber reinforced prestressed concrete slab (SFRPCS) with different steel fiber volume ratio (0%, 1%, 2%) is obtained according to four-point bend test, which reveals that the addition of steel fiber can retard the crack growth and enhance the flexural strength of SFRPCS. With the results of fatigue experiment, the damage forms of SFRPCS is analyzed, strain amplitude-cycle ratio curves are obtained and the plastic strain energy of SFRPCS with different steel fiber volume ratio during fatigue process is calculated. It is shown that after 80% fatigue life, the more of the steel fiber volume ratio, the less of the strain amplitude increment, which proves the addition of steel fiber can prevent the concrete matrix from cracking and improve the fatigue performance of SFRPCS, and the plastic strain energy curve of SFRPCS shows obviously three- stage development.

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