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[[File:CompactTensionSpecimen.svg|thumb|right|300px|Schematic and dimensions of a compact tension specimen.]]
A '''compact tension specimen''' is a notched sample and is a standard specimen in accordance with [[ASTM]] <ref name=astm>ASTM E647-00 ''Standard Test Method for Measurement of Fatigue Crack Growth Rates''.ASTM International. 2000.</ref> and [[International Organization for Standardization|ISO]] <ref name=iso>ISO 7539-6 ''Corrosion of metals and alloys - Stress corrosion testing - Part 6: Preparation and use of pre-cracked specimens for tests under constant load or constant displacement''. 2nd Ed. 2003.</ref> standards. The purpose of using a notched sample is to create a [[fatigue (material)|fatigue]] crack by cycling the sample to maximum and minimum loads. The fatigue crack will begin on the point of the notch and extend through the sample, the fatigue crack is a good representation of 'real life' inconsistencies which are introduced to a material due to processing techniques or welding. CT specimens are used extensively in the area of [[fracture mechanics]] and [[corrosion]] testing, in order to establish [[fracture toughness]] values for a material. According to the standards the constraining dimension of the CT specimen is the thickness of the material. CT specimens are used for experiments where there is a shortage of material available due to their compact design. For rolled materials the notch should be aligned with the roll direction where the material is weakest. This will allow the user to insure that all results achieved are conservative (worst case scenario)


== Stress intensity factor ==
The [[stress intensity factor]] at the crack tip of a compact tension specimen is<ref name=bower>{{cite book|title=Applied mechanics of solids|author=Bower, A. F.|  year=2009|  publisher=CRC Press.}}</ref>
:<math>
  \begin{align}
  K_{\rm I} & = \frac{P}{B}\sqrt{\frac{\pi}{W}}\left[16.7\left(\frac{a}{W}\right)^{1/2} - 104.7\left(\frac{a}{W}\right)^{3/2}
      + 369.9\left(\frac{a}{W}\right)^{5/2} \right.\\
      & \qquad \left.- 573.8\left(\frac{a}{W}\right)^{7/2} + 360.5\left(\frac{a}{W}\right)^{9/2} \right]
  \end{align}
</math>
where <math>P</math> is the applied load, <math>B</math> is the thickness of the specimen, <math>a</math> is the crack length, and
<math>W</math> is the width of the specimen.  The above equation has been fitted using numerical computations for various specimen geometries.


== References ==
While this mindset is certainly understandable, it simply isn't practical at that price point. A little more than 30 miles, with a 5,200 foot elevation gain, and you'll ride over the finish line. The trail then follows the side of the glacial Lake Pukaki through to Twizel, the town build in the 60s only to house workers from the Waitaki Hydroelectricity Scheme. There are more than 15 circuits in the sport of professional mountain biking. But except few exceptions; their speed is not as fast as young runners. <br><br>Adjust the tyre pressure too so it is at its optimum level. If you're planning on doing mostly road biking with the occasional cross country trip, and only once in a while going down an actual mountain. The owner's son is a mountain biker, and very friendly, but little gestures of courtesy go a long way in ensuring goodwill between the mountain biking and non-mountain biking communities. You can travel on the equivalent of 10 cents a gallon of gas. A sports drink is better than water as they contain carbohydrates and electrolytes that speed absorption of fluids and can give you an energy boost. <br><br>When the cable is pulled, the two arms are actuated and stopping power is applied to the rims. Here are some of the more popular mountain bike wheels now available [*CO]. People are buying bicycles to take care of their fitness as many go riding every morning or on weekends instead of jogging. Follow these simple tips and maximize your riding time while you wait for the snow to fall again. The suitable quill stems are sized down to the internal diameter of your fork's steer tube. <br><br>They are usually slightly used and cheaper than a brand new bike. Bikes are a great way to get around - they're fun, they're cheap to fuel (they burn only calories) and they're a great way to get fit. The apparel worn by rider is very much for their safety or protection. The back chain ring is a cog set featuring seven, eight or nine cogs, depending on how many "speeds" you have (21, 24 or 27). In order to find the best triathlon bikes, the following are a few places you can look. <br><br>You may even consider purchasing two different helmets and prepare yourself for all sorts of these riding experience. For the next mile and a half the trail is barely over a foot wide, with a precipitous drop to one side and the occasional tree trunk or branch reaching out from the other. This may be related to a muscle imbalance between opposing muscle groups in the leg and is commonly related to excessive foot pronation (collapsing arch). If this happens shorten the length of the sides of the rectangle otherwise go back to level 3.  In the event you loved this informative article and you wish to receive much more information concerning [http://legolcsobbdomain.info/profile/vel14 Womens mountain bike sizing.] i implore you to visit our web site. Some riders advocate the additional technical the trail the greater a hardtail mountain bikeis sought after.
<references/>
 
== See also ==
* [[Fracture toughness]]
* [[Stress intensity factor]]
 
[[Category:Fracture mechanics]]

Latest revision as of 21:25, 28 February 2014


While this mindset is certainly understandable, it simply isn't practical at that price point. A little more than 30 miles, with a 5,200 foot elevation gain, and you'll ride over the finish line. The trail then follows the side of the glacial Lake Pukaki through to Twizel, the town build in the 60s only to house workers from the Waitaki Hydroelectricity Scheme. There are more than 15 circuits in the sport of professional mountain biking. But except few exceptions; their speed is not as fast as young runners.

Adjust the tyre pressure too so it is at its optimum level. If you're planning on doing mostly road biking with the occasional cross country trip, and only once in a while going down an actual mountain. The owner's son is a mountain biker, and very friendly, but little gestures of courtesy go a long way in ensuring goodwill between the mountain biking and non-mountain biking communities. You can travel on the equivalent of 10 cents a gallon of gas. A sports drink is better than water as they contain carbohydrates and electrolytes that speed absorption of fluids and can give you an energy boost.

When the cable is pulled, the two arms are actuated and stopping power is applied to the rims. Here are some of the more popular mountain bike wheels now available [*CO]. People are buying bicycles to take care of their fitness as many go riding every morning or on weekends instead of jogging. Follow these simple tips and maximize your riding time while you wait for the snow to fall again. The suitable quill stems are sized down to the internal diameter of your fork's steer tube.

They are usually slightly used and cheaper than a brand new bike. Bikes are a great way to get around - they're fun, they're cheap to fuel (they burn only calories) and they're a great way to get fit. The apparel worn by rider is very much for their safety or protection. The back chain ring is a cog set featuring seven, eight or nine cogs, depending on how many "speeds" you have (21, 24 or 27). In order to find the best triathlon bikes, the following are a few places you can look.

You may even consider purchasing two different helmets and prepare yourself for all sorts of these riding experience. For the next mile and a half the trail is barely over a foot wide, with a precipitous drop to one side and the occasional tree trunk or branch reaching out from the other. This may be related to a muscle imbalance between opposing muscle groups in the leg and is commonly related to excessive foot pronation (collapsing arch). If this happens shorten the length of the sides of the rectangle otherwise go back to level 3. In the event you loved this informative article and you wish to receive much more information concerning Womens mountain bike sizing. i implore you to visit our web site. Some riders advocate the additional technical the trail the greater a hardtail mountain bikeis sought after.

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