![]() ![]() Chapters six, seven and eight look at the influence that the variety of variable loading spectra can have on fatigue strength, whether narrow or wide band loading or cycles of small stress range. This problem is further investigated in the next chapter which is devoted to two and three level load testing. Chapter four explores variable amplitude loading and the problem of how information from laboratory tests, obtained under constant amplitude conditions, can be applied to the design of structures for service conditions. Chapter three discusses the influence of residual stresses which can have a marked effect on fatigue behaviour. Cumulative Damage of Welded Joints explores the wealth of research in this important field and its implications for the design and manufacture of welded components.Īfter an Introduction, chapter two introduces the constant amplitude database, which contains results obtained in test conditions and which forms the basis of the basic S-N curves for various types of joint. However, fatigue strength for variable amplitude loading is not a constant material property and any calculations are necessarily built on a number of assumptions. To avoid fatigue it is essential to design the structure with inherent fatigue strength. Ultimately, a crack may propagate to such an extent that total fracture of the member may occur. Other Gann techniques like Gann Swing, Square of 9 degrees etc may yield better results.Fatigue is a mechanism of failure which involves the formation and growth of cracks under the action of repeated stresses. You need to be alert on these days or a day or two before or after the static solar day and react to the market based on the price action or whatever setup you generally trade with. But, to calculate the dynamic dates you need to consider a date where a top or bottom was formed and proceed accordingly. The static dates starts with March 21st and calculated as mentioned above. Generally on these dates the market is expected to make major highs, lows, tops and bottoms. ![]() Mar 21 to get all the accurate static days. – Multiply these degrees with 1.0146 and add that to the first static date i.e. – Average days in a calendar year are 365.256 He also stated that this was a very important seasonal time. ![]() He always said the year begins on March 21st, which is the first static date and not January 1st. Static and Dynamic Solar DatesĪccording to Gann, there are two types of Solar dates: Static and Dynamic. Days pertaining to 45, 90, 135, 180, 225, 270, and 315 solar degrees from Vernal Equinox (= 0 degrees Aries) are what he called Natural Trading Days. He used geometrical divisions of the solar year (solar degrees of longitude and calendar days) to ascertain turning points in financial markets. Sometimes Gann dates are exact and at times it is a day or two ahead or behind. ![]() He considered these positions very significantly, and that the market sentiments tend to change on these dates. Gann says that on these days the Sun comes at 15 degrees or 90 degrees with earth. Through his methods, he found that on certain dates the market trend changes. Gann’s market forecasting methods are based on geometry, astronomy, astrology, and ancient mathematics. William Delbert Gann is considered as one of the most successful stock and commodity traders ever lived. ![]()
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