Deformation

For this experiment, students observed three different types of materials and their mechanical properties. One material was aluminum, another material was cast iron, and the last sample was high density polyethylene (HDPE). The purpose of this experiment was to measure and test the mechanical properties of the three materials. The instrument used to conduct the mechanical properties test was a Tinius Olsen H25K-T benchtop universal testing machine with a 5000 pound capacity, which is used for…

This investigation focusses on an egg falling off a height of 4 metres in the fastest possible time without breaking the egg. In order to make this happen, an investigation must be conducted on the forces acting upon gravity, crumple zone theory, and energy transfer and absorption. The world is made up of matter and energy (Cool Cosmos, 2015). Matter is made up of atoms and molecules and these atoms and molecules are always in constant motion because of energy (Cool Cosmos, 2015). Gravity is…

dislocation that occurred in this lab was an edge dislocation where an extra plane of atoms was inserted into the crystal structure. If enough pressure is applied on the material, a permanent deformation stemming from dislocations can occur, known as plastic deformation. The hardening of materials through the use of deformation in a material stems from the atomic structure of a metallic material. Metals are held together by metallic bonding where electrons are shared amongst atoms so that a…

depending on the design and its patterns, shape, size, etc. Most crash boxes are designed with several grooves called “crash beads”. The beads are designed to be perpendicular to the frontal or rear crash direction. The beads undergo buckling deformation and make the crash box compress like an accordion, absorbing the energy of impact. The larger the number of plastic buckling is, the more crash energy is absorbed but the less durable the beads become. Thus, conventional crash boxes have the…

In recent years, thyroid nodules have become one of the common endocrine problems in the United States. The vast majority of thyroid nodules detected during physical examination are benign; however, 5-10% of palpable nodules prove to be malignant on biopsy (1, 2). On palpation, a solid thyroid nodule has a higher chance of being malignant (3,4). The American Thyroid Association and the American Society of Radiologists in the United States have defined various ultrasound (US) based prognostic…

“Two deformation types are Important in upper mantle conditions: diffusion creep and dislocation creep. Diffusion creep is solid-state diffusion between grain boundaries or across a crystal lattice. Preferred mineral orientation is not developed and thus the deformed…

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 for a…

Resilience is the ratio of energy released in deformation recovery to the energy caused the deformation. First ball has good elastic property when it hits the floor there is deformation occurs in the rubber ball. This deformation leads to change the location of molecules. After hitting the molecule try to attain its original position so it will try to reduce energy. Release of energy cause bouncing of ball. The second ball is very rigid so there is no deformation occurs so there is no bouncing…

1. OBJECTIVES The objectives of the experiment are: • Measurement of creep deformation in 2 materials; lead and polypropylene at room temperature. • Determine how creep deformation of chosen materials can be affected by stress. • Recognise that the two classes of materials show differences in creep behaviour. • Awareness of creep as a design consideration. 2. THEORY 2.1 Introduction Structural materials are often placed in service under a certain applied load at elevated temperatures (eg. wind…

preheating, and Pmin is exhibited when Δε300°C = 0.75Δεwithoutpreheating at the temperature lever. The variations of Δε (line II) and Pmin (line IV) intersected each other, which indicates that hot cracking inevitably occurs even if the actual deformation of the weld metal preheated to 300 °C declined in some degree. Then, the 10 mm-thick plates were welded at a preheating temperature of 300 °C. Hot cracking is located at the surface and inner part of the welds, as shown in Fig. 18. The surface…