Other Strength Tests

There are a number of other methods of measuring strength in situ, which have often been cited but seldom used offshore. Table 4.5 lists a number of methods and attempts to differentiate between those that have had some use and those that have had little or no use to measure the strength of marine soils. 

Probe/sensor movement permissible during testing Cone 5 mm/s Vane 1 mm/s 

Location of disturbed soil below drill bit and sensors. (After After Richards, A.R, and Zuidberg, H.M., In-situ determination of the strength of marine soils. In Strength Testing of Marine Sediments, STP 883, Chaney, R.C., and Demars, K.R., ed., American Society for Testing and Materials, Philadelphia, PA, 11-40, 1985. Reprinted with permission of Taylor Francis Group.) 

Other In Situ Shear Strength Equipment and Methods Used Less Than 2%-3% by the Offshore Industry 

---

Iv) Other strength tests. Estimates of unconfIned compressive strength of soils can also be obtained by use of a pocket penetrometer or by using a hand-operated shear-vane. 

Although the USP defines the knot-pull tensile strength test in terms of a surgeon s knot, most surgeons use a variety of other knots depending on... 

Like any other effective test, your company s PSM pilot should be neither too difficult nor too easy. A "successful" pilot test is one that (1) thoroughly exercises the PSM system you have developed so that you can identify its strengths and weaknesses, and (2) is sufficiently well-designed and -executed that it can act as a model for full-scale implementation. For example, testing a management of change system in a way that ranks changes would be appropriate. In short, consider the pilot test as a microcosm—and treat it with the same attention you would devote to a companywide installation. 

In addition to the strength tests already mentioned, there are other tests which can be applied and which at first sight give an indication of strength. These include hardness and fatigue tests. In reality all of these tests measure different physical attributes of the material and for a truly comprehensive picture of the behaviour of any material, results from all of these types of test should be known. 

Prints containing Alkali Blue are not fast to the standard DIN 16524 solvent mixture, but they are fast to acid, paraffin, butter, and other materials. Tested in accordance with normative testing standards (Sec. 1.6.2.2), the prints unexpectedly also show fastness to alkali. It should be noted, however, that at higher alkali concentrations the tinctorial strength of the system declines and the shade becomes duller. This is a result of the fact that the pigment reacts with alkali. 

Other nonstandardized test methods that have been used to characterize fiber-dominated strength and stiffness properties of filament wound FRP pressure vessels are ... 

In the absence of brittleness of wood and with the described differences in results according to variable number of layers acted on by the ball, attempts to correlate hardness test results with other strength parameters cannot succeed. Only after lengthy testing of various tree species, did Janka propose the following formula ... 

In other independent tests, ConsumerLab.com, a privately held U.S. company that specializes in laboratory analysis of nutritional and herbal supplements for purity, strength, and truth in labeling, found that 15% of creatine supplements tested did not meet industry standards for creatine content, purity, and label claims. 

A number of other agglomerate strength tests, generally of the attrition/ abrasion and impact varieties and of particular significance to a specific industry, will now be summarized. 

Peel values are recorded in pounds per inch of width of the bonded specimen. They tend to fluctuate more than any other adhesive test result because of the extremely small area at which the stress is localized during loading. Even during the test, the peel strength values tend to fluctuate depending on the type of adhesive, adherend, and condition of the test. In preparing the samples, care must be taken to produce void-free laminated bond lines. 

For comparison of weight strength values with other performance tests and calculations -+ Strength. 

To determine whether or not changes in color were accompanied by fiber damage, unexposed fabric and several fabrics exposed to the xenon-arc source for 550 kj/m2 (AE from 1 to 3) were tested for tearing strength by the Elmendorf method (11). Before exposure, the tearing strength of the blue wool fabric was 2040 g in the warp and 1710 g in the fill direction. For all other fabrics tested after exposure to light, the... 

---