Griffith's theory of fracture

High school
Pages 4 (1004 words)
Download 0
Ceramics and Metals have different atomic structure and ionic bonding.Ceramic materials have both ionic and covalent bonds.Ionic bond is the one that keeps them brittle.Ionic bond is lose and no definite direction.The positive and negative ions are arranged and are held together by attraction created by each other of different charge…


Ceramics and Metals have different atomic structure and ionic bonding. Ceramic materials have both ionic and covalent bonds. Ionic bond is the one that keeps them brittle. Ionic bond is lose and no definite direction.The positive and negative ions are arranged and are held together by attraction created by each other of different charge. When stress is applied, ions slide past each other then goes to different directions; ions of the same charge bumps and trying to repel each other; causing the atoms to spread. The material then breaks. In metals, the atomic structure consist more positively charged ions on a flow of negatively charge electrons. The electrons allows the positive charge ions to slide and roll past each other without breaking the bond when a certain stress is applied. This causes the metal to be tough. 2) Glass in general has a low tensile strength. This lies entirely with the fact that glass is a solid lacking crystalline structure or namely amorphous solid. Amorphous solid has a moving structure of molecules and are not compact, this results to having a low tensile strength than of other solids. However, there are methods of somehow improving glass’s tensile strength, strengthening them. One is by soaking the glass into a bath of potassium nitrate solution on an about 400 to 450 degrees Celsius having. Potassium nitrate has larger molecule structure than of a common sodium nitrate molecule in the surface of the glass. ...
Download paper
Not exactly what you need?

Related papers

Active shape modelling compared to hip morphometry in the prediction of hip fracture
This project aims to examine the relationship between the shape of the hip joint and total hip replacement in osteoarthritis,a severe illness with significant psychological and social repercussions.OA is the most common form of arthritis and it affects the connective tissues around the joints, particularly bone and cartilage. The cartilage covering the bone tips at the joints is an important…
27 pages (6777 words)
Positive Accounting Theory
The predictions of real world situations help small businesses in choosing the appropriate accounting policies that would help them in advancing. The predictions of positive accounting theory with regards to the real world situation go a long way in assisting firms to react positively to new standards of accounting introduced by the legal bodies. Moreover, the overall objective of the positive…
Option Pricing Theory
An option provides the buyer the right to buy or sale the quantity of goods he or she wants at a fixed price known as the strike price. Since the process of buying an option is optional, the holder can choose not to buy or sale the assets. There are two options these are; right to buy and right to sale. Options can come in several varieties like; a put option, gives the seller an underlying price…
8 pages (2008 words)
Financial Accounting Theory
The accounting frameworks are there for wide use of the financial statements of a company. A common framework of accounting would certainly be useful for the stakeholders of the company. But the criticism of the conceptual framework arises as these are not found so useful. The arguments are that the frameworks are not useful as there is lacking of practical evidences. The paper is an attempt to…
6 pages (1506 words)
Advanced Accounting Theory & Practice
By providing the basic structure for each type of financial statements, the standard has become highly essential for lenders, investors, shareholders and regulatory authorities. For that objective, the standard has classified different economic units as assets, equity, liabilities, income, expenses and cash flows. This classification is used to prepare and present different types of financial…
10 pages (2510 words)
Advanced Accounting Theory & Practice
Since then, more and more countries are adopting IFRS.1 IASB sets down accounting standards for the accounting policies that a company under IFRS must follow. These accounting standards are in accordance with the requirements of Conceptual Framework which assist users of financial statements to take various financial decisions. IASB are in continuous effort to improve the accounting standards in…
8 pages (2008 words)
Among these are the ground concepts that may be used in the formulation of accounting theories among other aspects of accounting theories. Some contend that in the beginning many primitive societies, those that were in existent in the earliest days, developed the art of counting before developing the art of naming (Brown, 2006, 3). These primitive forms of accounting for the number of items…
8 pages (2008 words)