Shear

Case Analysis 1. What are the facts in the case? John is the chief seismologist at one of the leading research facilities in North America who holds a P.H.D from one of the most prestigious university in the country. John has developed a method for predicting earthquake with 80% accuracy rate. From his investigation, he discovered that there is a 80% chance that an earthquake will occur with a magnitude of 7.3 in one of the four fault lines in southern california within two days. While three of the four faults are less populated, the fourth one is San Andreas. It is populated city and an earthquake there could be catastrophic. 2. What is the issue/dilemma? The issue is how John should proceed with reporting his finding. At a first glance, one can conclude that it is logical to just report the finding to the media so that the public will be informed. However, there are a couple of things at stakes here. If it turns out that he was wrong and the earthquake does not hit any of the four fault line, it may be problematic for receiving funding in the future. Also, if he is wrong, his career is at stake. He is the one that developed this new process, he will be discredited if he is wrong. 3. What are the John’s options? After finding his result, John has a few options available to him on how he should proceed next. John can either report his findings to the people or the media so that they can prepare or he may not report because it is a career risk that he can not make. 4.…

Is the Hayward Fault line moving the earth’s surface, and if so where is the evidence to prove it? There are various methods to prove that the Hayward Fault is creeping, and the evidence is viewable such as offset curbsides, building that are being torn apart, and cracks in the earth’s surface. The Hayward Fault is a strike-slip fault meaning it moves up, and down, thus giving us multiple locations in which the surface is affected. There are five different locations that I chose on the Hayward…

field vane shear tests: 1. The vane must be rotated soon (within 5 minutes) after insertion into the depth to be tested as delays of one (1) hour to one day may lead to overestimation of strength by 10% to 20% respectively. 2. Standard rate of rotation is 6 degrees per minute. 3. Correct calibration chart for the torque and right vane size must be used. 9.0 DIRECT SHEAR TEST Standards ASTM D3080; BS 1377 9.1.1 Objective Laboratory determination of the shearing strength of a soil…

the shear strength of steel fiber reinforced concrete deep beams without stirrups. For this 18 beams are cast. The beams are tested under two-point loading as per IS after 28 days curing. Fiber fraction is varied as 0%, 1.5% and 3%. The shear span-to-depth ratio (a/d ratio) for beams is kept as 0.60 for case-I and 0.74 for case-II. The cube compressive strength is estimated. The experimental results are compared with theoretical results obtained from empirical equations and design codes. Also…

Blood Flow as a Casson Fluid 1 THE PROBELM This problem was chosen from Problems for Biomedical Fluid Mechanics and Transport Phenomena section 8, because of my interest in biomedical engineering. How the body works on the most fundamental chemical and physical levels is something that has always fascinated me. This problem, and others in the section on blood flow, offered me a chance to delve deeper into how the body works as well as transport phenomena. The problem gave us a solved velocity…

A Description of the Leatherman Raptor Shear INTRODUCTION: The Leatherman Raptor shear is a compact, multi-tool, that was designed for medical and emergency professionals to have an all-in-one tool to use in survival situations. These beneficial shears contain several useful tools, such as an oxygen tank wrench, auto glass breaker, belt strap cutter, and ring cutter. DESIGN: The Leatherman Raptor shear folds into a compact size of 5 inches in length and comes with a convenient belt clip for…

The key objective of this laboratory experiment is to help the students understand the concept of shear stress and normal stress on a cross sectional area of a surface or rocks, and to be capable of constructing failure envelops. As we spread or stacked the pennies on a piece of paper placed on the table, we inflict a normal stress on the paper. We then created the shear stress by putting pennies into the cup that was connected to the paper on the table by a strain, and the number of pennies…

In particular, B, G, and E of hexagonal structure are expressed as follows [34]: where B, G, and E are bulk, shear, and Young’s modulus, respectively. The resultant elastic constants, bulk, shear, and Young’s modulus are summarized in Table 2. Here, it can be seen that the B, G, and E are increasing with increasing amount of Si on the A site. This could be attributed to the charge density shown in Table 1. In particular, the substitution of Al with Si increases the total charge density of the A…

Viscosity measurement was conducted using Brookfield Viscometer (ASTM D4402). In this test, the viscosity, torque, and shear stress are determined while applying a rotational shear on the specimens. To prepare specimens, 10.5 grams of 90 bitumen scrap shingle sample was poured into aluminum chamber. The thermoset was preheated at its designated temperature for 45 minutes. Samples and the spindle were preheated in an oven for 45 minutes at 180 C before being placed into the aluminum chamber in…

Shear-induced particle migration in noncolloidal suspensions: Review article Daniel Galvez-Moreno a) Missouri University of Science and Technology, 219 Butler-Carlton Hall, 1401 N. Pine St., Rolla, MO 65409, USA. Synopsis INTRODUCTION Noncolloidal suspensions are composed by a liquid and a solid phase, which the latter is constituted by particles where Brownian motion, repulsion/attraction forces and Van Der Waals bonds are often negligible [1]. Nowadays, the success of many industrial…