FATIGUE BEHAVIOR AND THE RELATIONSHIP BETWEEN CRACK PROPAGATION AND THE SLIT CONFIGURATION OF C/C COMPOSITES

2013 ◽  
Vol 27 (13) ◽  
pp. 1350094 ◽  
Author(s):  
MD. SHAFIUL FERDOUS ◽  
SOFYAN ARIEF SETYABUDI ◽  
CHOBIN MAKABE ◽  
MASAKI FUJIKAWA
Keyword(s):  
Fatigue Strength ◽  
Crack Growth ◽  
Fracture Behavior ◽  
Maximum Stress ◽  
Fatigue Behavior ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Fatigue And Fracture ◽  
Slit Length ◽  
The Relationship

The fatigue and fracture behavior of C/C composites fabricated using fine-woven carbon fiber laminates with α = 0/90° direction were investigated. Also, the phenomenon of crack growth behavior and the shear damage in the fiber bundle was discussed. Slits of several sizes were cut on both sides of a test section and different sizes of slit length were chosen. The effect of the slit configuration on crack initiation and growth behavior was observed. Specimens with blunt-notches and center-holes were also used to compare the fatigue strength and crack growth behavior. Non-propagating cracks were observed and fatigue limit was defined as the maximum stress at which specimen did not break for N = 107 cycles stress application. The longest fatigue life was obtained in the case of specimens with shorter slits. The relationships between fatigue strengths and specimen shapes were analyzed by stress concentration, K t , and stress intensity factor, K I . The effect of slit configuration on fatigue strength was then discussed regarding both the experimental and calculated consequences.

Effect of Creep Holding Time on the Fatigue Behavior in P92 Steel Weldment at High Temperature

2005 ◽  
Vol 475-479 ◽  
pp. 4211-4214 ◽  
Author(s):  
Bum Joon Kim ◽  
Byeong Soo Lim
Keyword(s):  
Growth Rate ◽  
High Temperature ◽  
Crack Growth ◽  
Fatigue Behavior ◽  
Growth Behavior ◽  
Holding Time ◽  
Crack Growth Behavior ◽  
Wave Shape ◽  
P92 Steel ◽  
The Relationship

In this study, the crack growth behavior in P92 steel (9%Cr-2%W) weldment was investigated at 600ı under the load of trapezoidal wave shape with various holding times. The relationship between the crack growth behavior and holding time was studied and it was characterized using the ΔK and (Ct)avg parameters. The number of micro-voids/cavities at the crack tip and fracture modes were examined and the relationship between crack growth rate and holding time was investigated.

Evaluation of Pulsating Tension Fatigue Strength and Small Crack Growth Behavior of Ni Based Castalloy 246

2016 ◽  
Vol 2016 (0) ◽  
pp. J0310102 ◽  
Author(s):  
Takayuki KURAMITSU ◽  
Tatsuya FUJII ◽  
Shota HASUNUMA ◽  
Takeshi OGAWA ◽  
Myunghun WOO ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Crack Growth ◽  
Growth Behavior ◽  
Small Crack ◽  
Crack Growth Behavior ◽  
Small Crack Growth

Non-Relaxing Crack Growth and Fatigue in a Non-Crystallizing Rubber

1974 ◽  
Vol 47 (5) ◽  
pp. 1253-1264 ◽  
Author(s):  
P. B. Lindley
Keyword(s):  
Crack Growth ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Maximum Deformation ◽  
Fatigue Data ◽  
Tentative Explanation ◽  
Tearing Energy ◽  
Relationship Of ◽  
The Relationship ◽  
Unique Relationship

Abstract The crack growth behavior of a non-crystallizing rubber, SBR, is investigated in terms of the tearing energy T, the energy available for crack growth. For cyclic deformations in which the minimum tearing energy is zero (relaxing conditions), a unique relationship is obtained between the growth per cycle and T at the maximum deformation. This rubber also exhibits crack growth at constant tearing energies. The relationship of the crack growth rate as a function of tearing energy, when the minimum tearing energy of the cycle is not zero, can be superimposed on the relaxing relationship by scaling the rates, and a tentative explanation is proposed for the scaling factor. Fatigue data are consistent with this.

Crack Growth Characteristics of Pure Copper for Smart Stress Memory Patch

2007 ◽  
Vol 353-358 ◽  
pp. 2045-2048
Author(s):  
Shoichi Nambu ◽  
Manabu Enoki
Keyword(s):  
Crack Propagation ◽  
Crack Length ◽  
Crack Growth ◽  
Stress Amplitude ◽  
Pure Copper ◽  
Growth Behavior ◽  
Growth Characteristics ◽  
Crack Growth Behavior ◽  
Stress Memory ◽  
The Relationship

A new sensing method called “smart stress memory patch”, which could estimate the maximum stress, the stress amplitude and the fatigue cyclic number simultaneously using Kaiser effect of Acoustic Emission (AE) and crack length of this patch, was developed. In this study, the crack growth characteristics of this patch was evaluated. Pure copper was used for this patch because its good corrosion resistance, stable crack propagation and so on. Two kinds of samples which were rolled and electrodeposited copper were prepared to investigate the effect of microstructure on crack growth behavior. Fatigue test was performed under constant stress amplitude to evaluate the crack growth behavior using the relationship between stress intensity factor range and crack propagation rate. The scattering in fatigue crack growth was also investigated to obtain the relationship between crack length and the fatigue cyclic number including two-sided 95% confidence interval. The effect of thickness and grain size on the scattering was discussed. Finally, good crack growth behavior was obtained and the fatigue cyclic number could be estimated by this patch.

scholarly journals OS1536 Fatigue strength and surface and internal crack growth behavior of cold tool steel SKD11

2013 ◽  
Vol 2013 (0) ◽  
pp. _OS1536-1_-_OS1536-3_
Author(s):  
Daisuke SATO ◽  
Sotomi ISHIHARA ◽  
Kenichi MASUDA ◽  
Noriyasu OGUMA ◽  
Noritaka KUSHIDA ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Crack Growth ◽  
Tool Steel ◽  
Growth Behavior ◽  
Internal Crack ◽  
Crack Growth Behavior
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