Application of a kerf to extend fatigue cycle of a plate under three-points bending loading

2019 ◽  
Author(s):  
M. S. Abdul Manan ◽  
A. F. Annuar ◽  
M. T. Mustaffa ◽  
M. S. Jamali ◽  
K. W. Leong
Keyword(s):  
Fatigue Cycle ◽  
Bending Loading

Numerical analysis of face sheet buckling for a CFRP/ Nomex honeycomb sandwich panel subjected to bending loading

2021 ◽  
pp. 114037
Author(s):  
Mae Oiwa ◽  
Toshio Ogasawara ◽  
Hajime Yoshinaga ◽  
Tsuyoshi Oguri ◽  
Takahira Aoki
Keyword(s):  
Numerical Analysis ◽  
Sandwich Panel ◽  
Face Sheet ◽  
Honeycomb Sandwich ◽  
Nomex Honeycomb ◽  
Bending Loading

Stress analysis of vascularized glass fiber composites exposed to bending loading

2021 ◽  
pp. 1-13
Author(s):  
Hamed Tanabi ◽  
A. Gencer Atasoy ◽  
Murat Demiral ◽  
Baris Sabuncuoglu
Keyword(s):  
Glass Fiber ◽  
Stress Analysis ◽  
Fiber Composites ◽  
Glass Fiber Composites ◽  
Bending Loading

Magnetostrictive Self-Diagnosing Smart Bolts

2014 ◽  
Author(s):  
Vladislav Sevostianov
Keyword(s):  
Magnetic Field ◽  
Plastic Deformation ◽  
Magnetic Fields ◽  
Hall Effect ◽  
Stress Level ◽  
Experimental Validation ◽  
Rock Bolts ◽  
Three Point Bending ◽  
Bending Loading ◽  
The Magnetic Field

The paper presents the concept of self-diagnosing smart bolts and its experimental validation. In the present research such bolts are designed, built, and experimentally tested. As a key element of the design, wires of Galfenol (alloy of iron and gallium) are used. This material shows magnetostrictive properties, and, at the same time, is sufficiently ductile to follow typical deformation of rock bolts, and is economically affordable. Two types of Galfenol were used: Ga10Fe90 and Ga17Fe83. The wires have been installed in bolts using two designs — in a drilled central hole or in a cut along the side — and the bolts were tested for generation of the magnetic field under three-point bending loading. To measure the magnetic field in the process of deformation, a magnetometer that utilizes the GMR effect was designed, built, and compared with one utilizing the Hall effect. It is shown that (1) magnetic field generated by deformation of the smart bolts at the stress level of plastic deformation is sufficient to be noticed by the proposed magnetometer; however, the magnetometer using Hall effect is insufficient; (2) Ga10Fe90 produces higher magnetic fields than Ga17Fe83; (3) the magnetic field in plastically bended bolts is relatively stable with time.

scholarly journals Evaluation of Physical and Mechanical Properties of Cotton Warps Under a Cyclic Load of Stretch-Abrasion

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Min Guo ◽  
Jianli Liu ◽  
Bo Zhu ◽  
Weidong Gao
Keyword(s):  
Mechanical Properties ◽  
Fatigue Behavior ◽  
Physical And Mechanical Properties ◽  
Strong Relationship ◽  
Quadratic Polynomial ◽  
Fatigue Cycle ◽  
Continuous Increase ◽  
Load Simulator ◽  
Relationship Of ◽  
Strength Retention

AbstractThe fatigue behavior of cotton warps was studied by a newly weaving load simulator (WLS) developed in our laboratory. Reborn hairiness, strength retention, and elongation retention of sized warps were adopted to evaluate the physical and mechanical properties of sized warps under stretch-abrasion cyclic loading. The influences of different fatigue cycles on the above three indicators were also discussed. The results indicated that the fatigue behavior of the cotton warps accompanied by abrasion yields a three-parameter Weibull distribution. All the fitting plots show acceptable linearity. Moreover, there is a strong relationship of quadratic polynomial between the tensile properties and the fatigue cycle of the sized warps according to the scatter fitting (R2 > 91.08%). Similarly, there is also a good relationship of quadratic polynomial between the reborn hairiness index and the fatigue cycle of the sized warps (R2 > 94.51%). Finally, regardless of the strength retention, elongation retention, and reborn hairiness, the physical and mechanical properties of the cotton warps still change with the continuous increase of the fatigue cycle after 40% of the fatigue cycle, but it is not significant. The research was helpful to estimate the capacity of the warps to sustain failure.

Strength and Stiffness Degradation of Carbon Fiber Reinforced Plastic under Cyclic Loading under Membran-, Shear- and Bending Loading

2015 ◽  
Vol 825-826 ◽  
pp. 968-975
Author(s):  
Peter Haefele ◽  
Oscar Herrera
Keyword(s):  
Carbon Fiber ◽  
Cyclic Loading ◽  
Carbon Fiber Reinforced Plastic ◽  
Fiber Reinforced ◽  
Operational Conditions ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced ◽  
Strength And Stiffness ◽  
Bending Loading

In order to meet the increasing lightweight requirements, the application of fiber reinforced plastics is indispensable. To ensure the structural durability of the car or machine under operational conditions, it is essential to know the long term behavior of carbon fiber reinforced plastic material (CFRP) under the numerous influencing factors under fatigue loading. For a reliable safety assessment of the car structure under operational conditions, the degradation of the stiffness and of the static strength after a certain damage due to cyclic loading is of particular importance. The paper covers the loss of stiffness and remaining strength as a function of fatigue damage for specimen and components under membrane, shear and bending loading. The tests are done using different layer set-ups (unidirectional, angle ply, quasiisotropic) and various loading conditions (membrane, shear and bending loading). In order to account for the transferability, the tests are carried out using specimen and components (hat sections). Both specimen and components show a significant loss in strength and stiffness.

Crack growth behavior in 316FR stainless steel plate under tensile-bending loading and its simplified evaluation

1998 ◽  
Vol 15 (2) ◽  
pp. 81-86
Author(s):  
Nobuhiro Isobe ◽  
Shigeo Sakurai ◽  
Kazumichi Imou ◽  
Morio Yorikawa ◽  
Yukio Takahashi
Keyword(s):  
Stainless Steel ◽  
Crack Growth ◽  
Steel Plate ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Stainless Steel Plate ◽  
Bending Loading
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