Material requirements planning

Determination of the gel-point of a resin via DMA testing and its use in a practical sense The DMA is used to determine the modulus values of the resin to associated temperatures and frequencies. The state of viscosity of the resin is also monitored through the evaluation of tan delta values. Gel-point of a resin implies that resin matrix has transformed into an elastic gel state and can no longer flow. The viscosity shows a sudden rise to extremely high values. The time at which this state is…

In this model the ignition time of a particle in the explosive was equal to its distance to the ignition point divided by the detonation velocity. The *MAT_NULL material and *EOS_LINEAR_POLYNOMIAL equation of state in LS-DYNA were used to express the above constitutive relations. The interface of Euler and Lagrange elements at the detonation model were coupled using Arbitrary Lagrangian-Eulerian (ALE) method [36…

Most tap water is more heavily tested and regulated than bottled water (Ellsbury 10, 2012). So why do we prefer it more than, just about free, tap water in our homes? Bottled water is expensive and uses more water to make than what is inside of it. It also uses about seventeen million barrels of oil to manufacture water bottles every year. This is enough oil to fuel one million cars a year (Ellsbury 10, 2012). We, as a community, need to try to cut back on using disposable water bottles, or…

Experiment 37: Friction Anne Smolinski as910513@ohio.edu Wednesday 11:50-1:40 TA: Sanjoy Sarkar November 11, 2017 Experiment 37: Technical Report ABSTRACT In experiment 37, the friction force is being explained and tested by using a block that is being pulled across a wooden base. Out of the four different types of friction, two will be tested during this experiment: (i) static and (ii) kinetic. Static friction can be defined as the force that resists motion of an object to a surface so…

attributing to the presence of ZIF-67 nanoparticles, acting as the crosslinkers, enhancing the interactions between the cellulosic molecular chains. The determination of mechanical properties under wet condition is of great significance to the paper-based materials. As shown in Fig. 3(C) and Table S3, the CP under wet condition had poor mechanical properties with tensile strength and elastic modulus of 0.15 and 22 MPa , respectively. In contrast, the CP/CNF showed favorable mechanical…

The purpose of this lab is to ascertain the hardness of two different materials. One material is aluminum the other will be determined through testing. Hardness is defined as a material’s ability to resist plastic deformation by indentation. Harder objects are more likely to resist deformation. The results of a hardness test will be important for engineers to determine what material will work best for a project. The material will need to hold up to any stress put on it and be able to work…

Moulding has more waste than when compared to other processes. To achieve the desired finish with Compression Moulding, the mould cavity is overfilled to some degree, in order to achieve the correct pressure to form the part correctly. Sometimes, excess material is used to push unwanted air out of the cavity, in order to have a void-free part. Another downside to this method, is that Compression Moulding does require a lot more manpower than some other methods being used. Therefore, there is a…

1 WRITTEN ESSAY Paragraph 1 The FePO4 crystal is examined at various temperatures ranging between 294K and 1073K by neutron powder diffraction. At relatively low temperatures, FePO4 adopts an α-quartz structure, which is tetrahedral. High pressures causes a phase change to a more dense octahedral structure, which is known as β-phase. The transition temperature is 980K. Cutoffs can be observed during the firstorder transition,. For α-phase, the increases in cell parameters…

The lattice symmetry of quartz α-FePO4 is trigonal. Its space group is P3121. The lattice symmetry of quartz β-FePO4 is hexagonal. It space group is P6422. According to the article, only two of the various quartz homeotypes which exhibit alpha-beta transitions have been studied in detail at high temperature. One of them is Silicon Dioxide. As such, it is possible for silicon dioxide to have the same structure when the chemistry is completely different. Since iron…

same load. As a result the graft part is wider than the vessel itself. On the other hand, silicon rubber is displaced less than the vessel and axiomatically narrower than the vessel itself. The reason and main cause of this difference between two materials is that, the stiffness of polyurethane is lower than that of the vessel and on the other side silicone rubber has a higher stiffness value. This matter can affect hemodynamic parameters as narrowing the section can increase the velocity and…