scholarly journals Effect of Stress Wave Form on Crack Growth Initiation Behavior of Delayed Failure under Cyclic Mixed Mode I and II Loading Conditions.

1992 ◽  
Vol 41 (460) ◽  
pp. 94-100
Author(s):  
Nobuki HIRUTA ◽  
Mitsuo KIDO
Keyword(s):  
Crack Growth ◽  
Stress Wave ◽  
Mixed Mode ◽  
Wave Form ◽  
Mode I ◽  
Loading Conditions ◽  
Delayed Failure ◽  
Growth Initiation

Analysis of fatigue crack growth under mixed mode (I + II) loading conditions in rail steel using CTS specimen

2020 ◽  
Vol 109 ◽  
pp. 104354 ◽  
Author(s):  
Grzegorz Lesiuk ◽  
Michał Smolnicki ◽  
Rafał Mech ◽  
Anna Zięty ◽  
Cristiano Fragassa
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Mixed Mode ◽  
Rail Steel ◽  
Mode I ◽  
Loading Conditions

Fatigue Crack Propagation under Mixed Mode I and III in Polyoxymethelene Homopolymer

2019 ◽  
Vol 827 ◽  
pp. 404-409 ◽  
Author(s):  
O. Slávik ◽  
Pavel Hutař ◽  
A. Gosch ◽  
Michael Berer ◽  
Tomáš Vojtek ◽  
...  
Keyword(s):  
Crack Growth ◽  
Growth Rates ◽  
Mixed Mode ◽  
Complex Problem ◽  
Polymer Materials ◽  
Mode I ◽  
Loading Conditions ◽  
Mixed Mode Loading ◽  
Ct Data ◽  
Crack Growth Rates

While mixed-mode loading conditions became hot topic recently, it is still quite unexplored area, even in case of metals. In case of polymers, this is even more complex problem, thanks to their higher sensitivity on higher temperatures connected with friction. Since polymer materials are very popular, this topic is of high interest. One of the best experimental specimens for achieving mixed mode loading conditions is the CRB specimen, as it provides clear mixed-mode I + III conditions under tension + torsion. Furthermore, for lifetime predictions it is necessary to calculate some material constants based on measured crack growth rates. However, these crack growth rates are not as easily and accurately measured on CRB specimens, as on CT specimens. Therefore, the main focus of this study is to observe difference between lifetime predictions based on CT and CRB data and possible application of CT data for CRB specimens.

scholarly journals Fatigue Crack Growth Analysis with Extended Finite Element for 3D Linear Elastic Material

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 397
Author(s):  
Yahya Ali Fageehi
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Life ◽  
Crack Propagation ◽  
Crack Growth ◽  
Mixed Mode ◽  
Propagation Path ◽  
Loading Conditions ◽  
Extended Finite Element ◽  
Linear Elastic

This paper presents computational modeling of a crack growth path under mixed-mode loadings in linear elastic materials and investigates the influence of a hole on both fatigue crack propagation and fatigue life when subjected to constant amplitude loading conditions. Though the crack propagation is inevitable, the simulation specified the crack propagation path such that the critical structure domain was not exceeded. ANSYS Mechanical APDL 19.2 was introduced with the aid of a new feature in ANSYS: Smart Crack growth technology. It predicts the propagation direction and subsequent fatigue life for structural components using the extended finite element method (XFEM). The Paris law model was used to evaluate the mixed-mode fatigue life for both a modified four-point bending beam and a cracked plate with three holes under the linear elastic fracture mechanics (LEFM) assumption. Precise estimates of the stress intensity factors (SIFs), the trajectory of crack growth, and the fatigue life by an incremental crack propagation analysis were recorded. The findings of this analysis are confirmed in published works in terms of crack propagation trajectories under mixed-mode loading conditions.

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