Introduction to Strength of Materials

Introduction:-

In earlier studies we have undergone a basic course in mechanics of Rigid Bodies, more commonly referred to as Engineering Mechanics or Applied Mechanics. Mechanics as such is subdivided into three branches; Mechanics of Rigid bodies, Mechanics of Deformable Bodies and Mechanics of fluids.

Mechanics of Rigid Bodies assumed bodies to be perfectly rigid i.e. there is no deformation of bodies under the action of loads to which they are subjected statics and Dynamics are the two branches of Mechanics Of rigid Bodies involving stationary and moving bodies respectively under the action of loads.

Stress:-

i. The force of resistances per unit are offered by a body against deformation is known as Stress. When a body is subjected to external loading the body undergoes some deformation. At the same time internal force of resistance is due to the cohesion of molecules inside the body. Thus stress is induced in the body upon external action of load

ii. If the body is able to resist the external load, it is said to be stable, in equilibrium and therefore for this condition the internal force of resistance should be equal to the external load.

By Definition Stress=force of resistance/cross sectional area

Or Stress=P/A

Strain:-

As the body produce force of resistance to counter the external loading it undergoes some deformation. The extent of deformation depend on the material property like molecular cohesion. The ratio of change in dimension is known as strain.

Since Strain is ratio, it has no units. We shall denote strain by letter e. If L is the original dimension and is change in dimension and then

Strain =Change in dimension/Original dimension

Types of Stress:-

1) Direct Stress and Direct Strain:-

When the force of resistance acts normal or perpendicular to the area on which it acts, the stress so produced is termed as Direct or Normal Stress and corresponding strain is referred to as Direct Strain.

We shall denote direct stress by letter ‘f’. Direct stress could be of tensile nature of compressive nature.

2) Tensile stress:-

When the force of resistance acts away from the cross sectional area, the direct stress is of tensile nature. Tensile stresses tend to cause an increase in the original dimension.

3) Compressive Stress:-

When the force of resistance acts towards the cross sectional area, the direct stress is of compressive in nature. Compressive stresses tend to cause a decrease in the original dimension.

Getting Started Building a Successful Online Business!

Start Planning!

It is true you can make money on the internet. You can make a lot of money on the internet. Online business is growing rapidly and there’s a reason for that. But starting an online business and starting a successful online business are not one and the same thing. Many people ask “How can I start an easy online business?” However, like any successful business idea the notion of an easy online business is a myth. A successful internet business needs the same attention to forethought as any successful business. Whether you are looking to start successful online store or successful home business the early stages require good planning, good organization and hardwork.

You will make money online with good planning!

The first step of starting a successful business online is the same step as starting any successful business. You need to plan your new online business as much as any other business. A home based online business is going to need to planning just as much as a home based cake business or delivery firm in order to succeed and make money online!

Only fools rush in!

Often, when people are starting a new online business their first impulse is to get online! This would seem to make sense. I mean how can you start an online business without being online? They then waste a lot of time and money searching the net for good hosting and snapping up web domains so they can quickly get started in their new online business. In truth though you are already online! And you are already working on your new internet business.

What kind of Online Business do you want to start?

The first thing you will need to plan for in your online business is what kind of business that will be! Are you trying to sell items on eBay? Start an online store selling a product of your own? Or start an online store selling someone else’s products? Are you going to start a website to market affiliate products?

Get a clear idea of what kind of online business you want and research it.

Having a clear idea of where your new online business is going is going to save you a lot of wasted time and money. Good research into what you will want to market in your online business will help you to choose wisely when choosing domains. How much traffic or web space you will need for your online store or your new online business website will determine which hosting option you choose and where you plant those domain names – especially, if you plan on having multiple sites.

What products will you sell and how will you market them?

Marketing tactics are going to be crucial to your online success. Knowing which path you are taking and what marketing methods you will be using is going to save you a lot of time and money in the future. It will determine what kind of site you will need and what marketing tools you will use. Good choices early on will help your business to achieve its aims quickly and mean any money you did spend on hosting and domains starting an your business was money well spent. Having a clear business idea and choosing the right products to sell on your website will increase it’s effect and help you decide the design and content of your site.

Get the proper training and online resources.

If you are completely new to internet marketing and online internet business, one thing that often proves crucial to success is proper training. Getting help and advice form the experts can save you a lot of time in learning skills of online business and have you running your internet business much more quickly and profitably. This needn’t break the bank and there is a lot of information out there.

Decide on a budget and research where best to spend it.

Lastly, decide on a budget! If you know how much you are prepared to spend investing in starting your business and how much money you want to make online then you can research the most cost effective way of achieving online success!

So in short! How to get started in building successful business online?

1. Make a plan and research it!

2. Decide what kind of business you want.

3. Decide what products are best for your business.

4. Decide how best those products will be marketed online.

5. Get the proper training and advice form experts.

6. Decide how much money you want to invest and plan accordingly.

7. Stick to the plan and don’t get distracted.

With the proper planning and strategy your business will be a success.

Of course this is only Step 1 to starting a new business online. But if you are serious about starting a business then this should be your most important step!

Three Reasons to Shift to Online Tutoring

The Internet changed education. Although traditional teaching methods are still the most effective for schooling, the Internet has paved the way for us to learn through different means. The online world is rich with academic content, instructional videos, written tutorials, and webinars. But despite all these options, there is one format for learning that sits on top of the list as far as convenience and cost are concerned: online tutoring.

Nothing beats a one-on-one tutoring activity. The sessions between the instructor and the student are fruitful. They are focused. And both parties spend time focused on one thing: student development.

Today, many people still question whether online tutoring is worth the money. How does it differ from traditional, physical tutoring and is it effective? In this article, we will explore its benefits and let you decide.

You Have More Flexibility

Since the whole world is your marketplace, you can select online tutoring services that fit your most convenient time. Logistics should be the least of your concerns.

Whether you are a student or a parent, schedule should never be an issue anymore. A lot of tutors are available 24/7 and all you have to do is to find a suitable and convenient time for you or your children. This flexibility allows you to perform all of your duties in the office or at home with no detriment to your children’s education.

You Have More Tutor Options

You have a whole world of instructors at your fingertips. With traditional tutoring, you are limited to what your city can offer. If you live far enough, you also get lesser options. You are tied up with the quality of instructors available in your area, let alone choose high quality services in different academic domains. In addition, many tutors will not travel that far going to your home due to the costs of transportation. This leaves you with a smaller pool of tutors to choose from if home service is what you need.

Online, you can choose tutors who live on the other side of the world. You have feedback mechanisms to review and validate the effectiveness of the instructor. You can select tutors on the basis of their specialization. You can choose based on their language, too.

You Have Access to a Ton of Learning Materials

In the brick and mortar world, you are limited to the books available within your academic environment. Though it is true that you can browse online after your tutoring session, the materials you find are not designed for your specific needs. You will waste your time sifting through all these information before you find the right one for the subject you are studying for.

With online tutoring, your instructors have already prepared course work and instructional materials specific for you. These materials are tailor-fit for each subject at each grade level. This also means that these materials are proprietary and you can only access this if you are a registered member.

If you need a refresher course, just tell your instructor to give you one; if you need quiz materials to test out your new skills, tell your instructor and he can do the same. Some services even offer a library of materials online, accessible 24/7 for paying members.

All in all, online tutoring has a lot more to offer than traditional ones. And we did not mention that space is never an issue since you can conduct the sessions anywhere. All you need to have is your laptop or tablet and a strong Internet connection. Traditional tutoring does not have the versatility of online tutoring. In fact, most tutors are now shifting to online tutoring because of the mutual benefit it offers to both the instructor and the student.

Visit this online tutoring website for more details about the services available for your online education.

Aaron Matthew Ang is a seasoned web content writer with over a decade of experience. He has written in dozens niches and practically all topics under the sun. To date, he has written more than 1000 combined articles and eBooks for various niches.