the components were performed by an individual blinded to the mechanical results. Statistical Analysis Statistical analysis were performed using Prism V5.0 software (GraphPad Software Inc., San Diego, California). Mean values and standard deviations are reported to compare the average results between the tissue groups and amongst the regions. In all statistics, the differences were considered significant when P-values ≤0.050. The effect of quadrants/tissue types on thickness, incremental moduli, and toughness were examined by employing the two-way analysis of variance (ANOVA), and conducting Bonferroni’s multiple comparisons post-test. The correlations between the variables were considered to be significant when the slope value of the linear regression was significantly different from zero with a P-value ≤ 0.050.…
Stress is a very complex topic. To my understanding it is an emotion felt not only mentally but physically as well. A large straining that you endure from being under immense pressure, at times you feel there is no way out. It can come from the negativity of your peers, and almost always from your very own self-doubt. Stress to me as a student and as a worker are very separate functions. From my student side I worry about not doing well on not only one but a series of demanding tasks from all of…
Lab 1: Fluctuating Stresses Jinyuan Zhang Due Date: Wednesday, October 14, 2015 Lab Section: 5 Objectives: There are three objectives for this lab. The first objective is applying stresses calculation on a bicycle crank shaft with real-world load. Second objective is visualization of stresses’ fluctuate in process of fatigue failure analysis. The last objective is using the stresses model to find the force is applied on the crank shaft. Sample Calculation: For collecting the…
\begin{abstract} It is known that Groebner bases is EXP-SPACE in general. We show that this remains true over Boolean rings. \end{abstract} \section{Boolean Rings} Let $\mathbb{F}_2 = \mathbb{Z}/(2)$. Let $R_n = \mathbb{F}_2[x_1,\ldots,x_n, y_1,\ldots,y_n, z_1,\ldots,z_n]$ and % \footnote{Over $\mathbb{F}_2$, $+$ is the same as $-$.} \[ S_n := \{c^2 -c \,\, | \,\, c \in \{x_1,\ldots,x_n, y_1,\ldots,y_n, z_1,\ldots,z_n\} \}. \] Let \[ R_n^{\rm b} := R_n / (S_n). \] This is {\em Boolean ring},…
at an angle to the applied load. As a result, lateral shearing stress is produced in the cube specimen. The effect of this shear decrease towards the center of cubes; so these sides of the cube have near vertical cracks at the cube center. Figure (4.3): Failure pattern of cubes specimens (C1). 4.2.3. Static Modulus of Elasticity: Modulus of elasticity is a necessary parameter to determine the stresses in materials and structures. Even though concrete has nonlinear stress-strain…
An energetic contour path integral (called J) was independent of the path around a crack. The J-integral is equal to the strain energy release rate for a crack in a body subjected to monotonic loading. This is generally true, under quasi-static conditions, only for linear elastic materials. For materials that experience small-scale yielding at the crack tip, J can be used to compute the energy release rate under special circumstances such as monotonic loading in mode III (anti-plane shear). The…
of the wire, and ε_G is the axial strain [2]. Another key theory is the Bernoulli-Euler beam theory. Which to show this we must look at four equations that make up the theory. The first one being, Where M is the bending moment, P is the applied load at the position x, where x is the length of the Cantilever clamp to the center of the strain gage, and L is the cantilever clamp to the center of micrometer post length. What this equation is representing the relation of the bending moment at…
There are 2 types of strengths that materials can be tested on: Comprehensive strength and Ultimate Tensile strength. Ultimate Tensile strength is measured by how much stress can a material withstand, while being stretched or pulled apart before breaking, while comprehensive strength is how much van the material resists while being pushed in (together). There is also a Yield Strength- the point at which the material starts to slowly break and cannot come back to it’s shape. Before the yield…
CHAPTER- 5 ANALYSIS OF STEEL LEAF SPRING ________________________________________________________________ The aim of this analysis is to study the multi-leaf steel leaf spring under loading conditions and verify those results within the allowable limits. ANSYS software is used to analyze the stresses and strains by performing static analysis for the given leaf spring specifications and modal analysis is performed to determine the natural frequencies and mode shapes to asses the behavior of the…
disadvantages are that the body is submitted to a very early fatigue spectrum and from the driver perspective the perceived quality to be as “weak” or “not properly assembled”. This is because the body acts like a vibrating beam with free ends. According to Malen (2011, p.126) the body has an infinite number of resonant frequencies, but one of the most critical is the first bending frequency (lowest frequency of primary bending). This value should be between 22 to 25 Hz. Those values of…