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398 (0,074s) •

Project

Description of short fatigue crack growth in large scale yielding conditions (GA18-03615S)

The prediction of residual fatigue life of structures or components with cracks requires knowledge about the crack growth rate. Theory and experimental procedures for the measurement of the crack growth rate in the small sc...

Materials engineering

  • 2018 - 2022
    • •
  • 5 599 tis. Kč
    • •
  • 5 425 tis. Kč
    • •
  • GA ČR
Project

Probability approach to the critical fatigue crack in steel structures (GA103/05/2467)

. The standard methods were based on requirement, which does not allow fatigue crack during failure. The data are represented in Wohler (Aa-N) curves. The fatigue cracks, which the absence possibility this method receive the fatigue...

JN - Stavebnictví

  • 2005 - 2007
    • •
  • 1 080 tis. Kč
    • •
  • 1 080 tis. Kč
    • •
  • GA ČR
Project

The effect of free surface on fatigue crack growth (GP106/06/P239)

The nature of the crack tip singularity changes in the vicinity of a corner point where a crack front intersects a free surface. Due to the fact, crack singularity) and both influence the fatigue crack propagation ...

JL - Únava materiálu a lomová mechanika

  • 2006 - 2008
    • •
  • 875 tis. Kč
    • •
  • 875 tis. Kč
    • •
  • GA ČR
Project

Research of potential method measuring system for monitoring initiation, stable and unstable crack growth for new industry application. (TH02020071)

method measuring system using for crack growth rate measurement of fatigue cracks of creep cracks in operating power plants. Use of the measuring system will be extended and fatigue crack growth due to service lif...

JB - Senzory, čidla, měření a regulace

  • 2017 - 2020
    • •
  • 17 050 tis. Kč
    • •
  • 10 225 tis. Kč
    • •
  • TA ČR
Project

Micro-interpretation of fatigue defects in steels of various strengths (GA103/06/1382)

crack propagation. Fatigue cracks are initiated at corrosion pits being formed result in the growth of fatigue cracks the rates of which are supposed to be relative to the crack tip plastic displacement. The plast...

JL - Únava materiálu a lomová mechanika

  • 2006 - 2008
    • •
  • 3 824 tis. Kč
    • •
  • 3 824 tis. Kč
    • •
  • GA ČR
Project

Oxide-induced crack closure and its implications for lifetime prediction of mechanical components (OXILAP) (GA22-28283S)

The impact of oxide-induced crack closure (OICC) on a fatigue crack propagation threshold will be studied. The oxide formation on new crack surfaces significantly influences crack closure and is also responsible fo...

Mechanical engineering

  • 2022 - 2024
    • •
  • 6 468 tis. Kč
    • •
  • 6 468 tis. Kč
    • •
  • GA ČR
Project

Complex method of monitoring and detailed measuring approach of crack propagation in conrete (1F55A/072/120)

Crack appearance in the concrete bridge structures could strongly influence reliability and durability. The uniform method of crack measuring and monitoring will be elaboratedand verified by statistical analysis of data obtained by ...

JM - Inženýrské stavitelství

  • 2005 - 2007
    • •
  • 1 900 tis. Kč
    • •
  • 1 900 tis. Kč
    • •
  • MD
Project

Effect of Impurity Embrittlement and Microstructurally Induced Shielding on Crack Stability and Growth Resistance in Low Alloy Steels (OC 517.30)

evaluation methods, however, completely ignore the micro-tortuosity of the crack front.Related shielding effects might substantially reduce the real crack driving force in comparison with the standardly assumed straight crack

JG - Hutnictví, kovové materiály

  • 1998 - 2001
    • •
  • 4 665 tis. Kč
    • •
  • 1 155 tis. Kč
    • •
  • MŠMT
Project

Intrinsic resistance to shear-mode fatigue crack growth in metallic materials (GJ17-15716Y)

crack propagation in metals. The project objective is determination of micromechanisms of propagation of these cracks, relationships for effective thresholds understanding of mechanisms of shear-mode crack growth which are...

JL - Únava materiálu a lomová mechanika

  • 2017 - 2018
    • •
  • 3 110 tis. Kč
    • •
  • 3 110 tis. Kč
    • •
  • GA ČR
Project

New Approaches to Investigation of Fatigue Crack Propagation in Modes II, III and II+III (GAP108/10/0698)

A general knowledge about stability and growth conditions of fatigue cracks cracks in order to better understand the crack-growth micromechanisms. Fatigue tests for simultaneous crack growth under all shear modes i...

JL - Únava materiálu a lomová mechanika

  • 2010 - 2013
    • •
  • 6 000 tis. Kč
    • •
  • 6 000 tis. Kč
    • •
  • GA ČR
  • 1 - 10 out of 398