# How to size a simple mechanical piece ?

• nebbione
In summary, the individual is a new user of the forum and is a student in computer engineering with a strong interest in robotics and mechanical design. They are seeking guidance on how to use math and formulas to size mechanical pieces, using the example of calculating the strength of a table made of wood with four legs. They are also interested in applying this knowledge to their projects, such as designing a system to lift 10 kg. They mention a book, "Engineering Mechanics for Structures" by Louis L. Bucciarelli, as a good resource for this topic. However, they also acknowledge that sound engineering judgment is necessary when using equations and suggest finding an introductory book on strength of materials and statics in their native language.

#### nebbione

Hi everyone! I'm a new user of this forum! I'm a student in Computer Eng. but I'm even very keen about robotics and mechanical design.
I have a discrete knowledge in calculus and linear algebra and wanted to know how i can size a mechanical piece with math (formulas).
For example : let's take a simple (i think) example, i want to calculate how much can resist a table made of wood that is long 5 meters and has four legs, each leg is uniform and has an area of 6 cm^2.
I know that I've benn too general, but i would like if somebody can explain how i can do this.
It's very interesting even the reverse process, i mean for example if i have to design a system that has to lift 10 kg etc...
It would be wonderful if i could apply this to my projects so that when i create a simple robot i can even size the mechanical parts.

Engineering Mechanics for Structures by Louis L. Bucciarelli is a good/quick read for a primer in this area.

Generally speaking, their are many "easy" equations that can be used to approximate what you are looking for. Unfortunately, sound engineering judgement is required to choose the appropriate assumptions that accompany those equations. If the above book is to slow to read as it is not in your primary language, get an introductory book on strength of materials and statics in your native tongue.

Thank you very much!

## 1. How do I determine the appropriate size for a simple mechanical piece?

The appropriate size for a simple mechanical piece is determined by considering factors such as intended use, load capacity, and material properties. It is important to consult engineering principles and use mathematical calculations to find the most suitable size.

## 2. What are the common methods for sizing a simple mechanical piece?

The most common methods for sizing a simple mechanical piece include using engineering calculations and simulations, referencing industry standards and guidelines, and conducting physical tests and prototypes.

## 3. Are there any industry-specific considerations when sizing a simple mechanical piece?

Yes, the specific industry in which the mechanical piece will be used may have certain regulations, standards, or requirements that need to be taken into consideration when determining the appropriate size. It is important to research and consult with experts in the field to ensure compliance.

## 4. Can computer-aided design (CAD) software be used for sizing a simple mechanical piece?

Yes, CAD software can be a useful tool for sizing a simple mechanical piece. It allows for precise calculations and simulations, and can also help visualize the final product before it is manufactured.

## 5. How can I ensure that the size of my simple mechanical piece is accurate and efficient?

To ensure accuracy and efficiency in sizing a simple mechanical piece, it is important to conduct thorough research, consult with experts, and use appropriate engineering principles and calculations. Additionally, conducting physical tests and prototypes can help validate the size and make any necessary adjustments.