Splitting initiation and propagation in notched unidirectional graphite/epoxy composites under tension-tension cyclic loading

1985 ◽  
Vol 4 (2) ◽  
pp. 111-133 ◽  
Author(s):  
H.H. Daken ◽  
J.W. Mar
Keyword(s):  
Cyclic Loading ◽  
Epoxy Composites ◽  
Initiation And Propagation

Fatigue Testing of Large-Scale Models of Submarine Structural Details

1965 ◽  
Vol 2 (03) ◽  
pp. 299-307
Author(s):  
Frank W. Dunham
Keyword(s):  
Cyclic Loading ◽  
Large Scale ◽  
Fatigue Testing ◽  
Fatigue Cracks ◽  
Pressure Variation ◽  
Test Tank ◽  
Initiation And Propagation ◽  
Scale Models ◽  
Structural Details

The conversion of a 30-ft-dia test tank to a facility for subjecting large-scale models of submarine structural details to cyclic loading is described. By means of automatically controlled valves, models were subjected to a pressure variation simulating a submarine diving to its test depth and returning to the surface. The cyclic rate was slightly less than one per minute. The system was so designed that the test tank itself was not subjected to the pressure variations. Details of a series of models designed to simulate particular structural details of interest in recent submarine construction are described. Results of the tests to date are summarized, and several observations relative to the initiation and propagation of fatigue cracks in submarine structural details are presented.

Crack initiation and propagation in aluminum alloys with coatings during cyclic loading

1980 ◽  
Vol 19 (3) ◽  
pp. 170-172
Author(s):  
L. P. Gerasimova ◽  
Yu. P. Guk ◽  
B. M. Solov'ev ◽  
N. M. Piskareva ◽  
T. V. Surikova
Keyword(s):  
Aluminum Alloys ◽  
Cyclic Loading ◽  
Crack Initiation ◽  
Crack Initiation And Propagation ◽  
Initiation And Propagation

Crack initiation and propagation in Chromium pre-alloyed PM-steel under cyclic loading

2008 ◽  
Vol 75 (3-4) ◽  
pp. 750-759 ◽  
Author(s):  
R. Gerosa ◽  
B. Rivolta ◽  
A. Tavasci ◽  
G. Silva ◽  
A. Bergmark
Keyword(s):  
Cyclic Loading ◽  
Crack Initiation ◽  
Crack Initiation And Propagation ◽  
Initiation And Propagation

A Dislocation Migration Approach to Mode II Fracture Initiation and Propagation under Cyclic Loading

2010 ◽  
Author(s):  
A. Karami ◽  
J. Szymanski ◽  
Jane W. Z. Lu ◽  
Andrew Y. T. Leung ◽  
Vai Pan Iu ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Fracture Initiation ◽  
Mode Ii ◽  
Mode Ii Fracture ◽  
Initiation And Propagation

Fracture Analysis of EN AW-6063 Aluminum Alloy Thin-Walled Welded Stairs

2016 ◽  
Vol 250 ◽  
pp. 22-28
Author(s):  
Krzysztof Gołoś ◽  
Maciej Jastrzebski
Keyword(s):  
Aluminum Alloy ◽  
Cyclic Loading ◽  
Residual Strength ◽  
Weak Link ◽  
Fracture Analysis ◽  
Crack Initiation And Propagation ◽  
Initiation And Propagation ◽  
6063 Aluminum Alloy ◽  
Thin Walled ◽  
Welded Connection

In the paper extended experimental study and numerical analysis of fatigue strength of aluminum alloy EN AW – 6063 welded thin-walled aluminum structural stair construction is presented. The FEM calculations were carried out. In analysis the concept of the weak link was applied. The critical thin-walled welded tread stairs node was selected and the concept was verified experimentally for two variants of cyclic loading. The effect of cyclic loading on crack initiation and propagation in the welds and on residual strength was examined. It was observed the reduction in residual strength, i.e. 1.61% for the construction of thin-walled welded connection after 30 000 cycles, and about 6.19% after 100 000 cycles.

scholarly journals Mechanical and failure bahaviour in carbon/epoxy composites

2002 ◽  
Vol 56 (9) ◽  
pp. 361-368 ◽  
Author(s):  
Momcilo Stevanovic ◽  
Danijela Sekulic-Pesikan
Keyword(s):  
Mechanical Properties ◽  
Flexural Modulus ◽  
Epoxy Composites ◽  
Elastic Behavior ◽  
Strength Analysis ◽  
Static Characteristics ◽  
Failure Initiation ◽  
Linear Elastic ◽  
Initiation And Propagation ◽  
Non Linear

A review of the mechanical properties and failure initiation and propagation in carbon/epoxy composites is presented. The results of the study of the macromechanical static characteristics, non-linear elastic behavior flexural modulus and shear properties of unidirectional composites (UDC), as well as, of tensile, compression and flexural moduli, strength analysis edge and hybrid effects in multidirectional composites (MDC) were discussed A discussion of the non-linear elastic behavior of carbon/epoxy UDC, the flexural moduli of both UDC and MDC, strength analysis and edge effects of laminates is emphasized.

scholarly journals Micromechanical analyses of the crack in glass woven-epoxy composites subjected to in-plane compression load

2008 ◽  
pp. 111-120
Author(s):  
Marina Stamenovic ◽  
Slavisa Putic ◽  
Branislav Bajceta ◽  
Dragana Vitkovic
Keyword(s):  
Life Prediction ◽  
Epoxy Composites ◽  
Surface Cracks ◽  
Load Identification ◽  
Test Results ◽  
Compression Load ◽  
Micro Cracks ◽  
Initiation And Propagation ◽  
Plane Compression ◽  
The Subject

The subject of this paper is micromechanical analyses of the crack on glass wovenepoxy composites subjected to in-plane compression load. Identification and understanding of the first damages as micro-cracks and micro-mechanisms and their further spreading during compression loading of construction of composite material are of great importance for every special usage and life prediction. Five different structures of glass epoxy composites were tested with orientation of reinforcement 0?/90? and ?45?. The specific weights of reinforcement were 125, 170, 210, 550 and 880 g/m?. The analysis of compression test results was performed on the basis of the structure. Micromechanical analyses of surface cracks of the samples was carried out by scanning electron microscopy, and the established models and mechanisms of initiation and propagation of cracks are very valuable in predicting the behavior of the real constructions subjected to compression load.

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