Jump to content
Mechanical Engineering

Blogs

 

Suddenly Lifted Bar

Mechanics Corner     A Journal of Applied Mechanics and Mathematics by DrD, # 51     © 4 July, 2020   Suddenly Lifted Bar Introduction     In the Forum section, under the Machine Dynamics and Design Considerations heading, Mr. Negar Rahbar has posted a topic, Bending Moment. It is a problem he found in an older textbook (one that I might have studied back in my college days, although in this case, I did not), a book titled Theory and Problems of Machine Design by Allen

DrD

DrD

5 Technologies Driving MEP Sustainability

5 Technologies Driving MEP Sustainability

Nowadays, the construction industry is echoing with the word "Sustainability." Everyone seems to be focused on finding more sustainable design solutions for building structures and objects.   The moment we realized that we would have to work on installing eco-friendly systems to help the planet recover from the damage done by human hand, most new construction projects were required to be eco-friendly.   However, going green isn't as simple as it sounds. It's a huge challenge, and worki

Natalie

Natalie

 

Why You Shouuld NOT Use the D'Alembert's Principle

Mechanics Corner   #50 A Journal of Applied Mechanics and Mathematics by DrD                                    Why You Should NOT Use the D'Alembert's Principle I think it is safe to say that every engineering student studies both Statics and Dynamics. We are told that Statics is easier than Dynamics, which is often true but not so in all cases. When we get to Dynamics, many teachers, particularly physics teachers, will urge the use of something called D'Alembert's Principle. The

DrD

DrD

 

A Bad Example #49

Mechanics Corner A Journal of Applied Mechanics & Mathematics, #49 A Bad Example Most of us are inclined to trust an established textbook. We assume (1) the author knows what he is talking about, (2) the book has been carefully vetted by several editors and reviewers, and finally (3) the fact that it is well established in the market means that thousands of other readers have tacitly endorsed it as well. While these assumptions are usually true, they are no guarantee, and they

DrD

DrD

 

New Help Site

I'd like to invite all readers to visit my new website: Machinery-Mechanics-Professor.site I'm offering free help for engineering students through that site, so come on over and take a look. DrD

DrD

DrD

 

When You Ask for Help ....

Today, I have a question for readers. I'd like to get everyone who is willing to answer the same question, but also tell me whether you are a practicing graduate engineer or if you currently a student. I think these two groups will answer somewhat differently, so it is important that you identify which one you fall into. The question is really simple: When you ask for help, what do you really want? Are you asking for someone to step in and solve a problem for you? Or, are you asking for a f

DrD

DrD

 

Mechanical engineering login contest 1

To Encourage participation on Mechanical-engg.com, knowledge community for mechanical engineering professionals. 1 Login on 22 or 23rd January 2020 Mechanical-engg.com and update your profile. login link : https://mechanical-engg.com/login/ One Lucky winner will get Amazon Gift card (Rs 300 or 5 USD) This is the first contest and we are testing our mechanism... Be prepared for some exciting prizes in the upcoming contest. Make sure you are a mechanical engineer

admin

admin

 

What Would You Like to Know?

What Would You Like  to Know? If you could ask me any question you want, what would you like to know that you think I might know? I certainly do not know everything, but through the years I have accumulated a certan amount of knowledge that I'd like to pass on to you. Therefore, I ask, what would you like to know? Many readers are still in college, and no doubt they would like to know what is going to be on the next exam. I'm sorry, but I have no way to know that. What I might be able

DrD

DrD

Mechanical Engineering Forum Invitation

Mechanical Engineering Forum Invitation

*Invitation - Only for Mechanical Engineers* Mechanical Engineering Discussion forums  *Forums Link*  https://mechanical-engg.com/forums/ To Login  https://mechanical-engg.com/login/ For quick login - you can login with Facebook, Twitter, Google etc. To Start new discussion : Click Start new topic button Start with Profile and status updates *Special Offer to encourage participation in the field of Mechanical Engineering*   Two Lucky members who logged in between 5

admin

admin

 

get updates via whatsapp - Join whatsapp groups for Mechanical engineers

Dear Members, we will share quiz links,  questions, and discussion topics directly with whatsapp group. Please join only 1 group as - all groups will receive same posts  Only for Mechanical Engineers  They will be admin only groups ... you will not be allowed to post - Marketing people should not join these groups. All interaction will take place via websites Mechanical Engineering Group 101 https://chat.whatsapp.com/GUCrHpf4igeJxRXjthnzXw Mechanical Engineering Gro

admin

admin

 

Describe the steps usually considered in the process of material selection.

(a) Describe the steps usually considered in the process of material selection. (b) How material selection is done using decision theory.   Ans. (a) Like any other aspect of engineering design, material selection is also equally important aspect. Material of part depends on the requirements of the part, number of parts needed, and manufacturing process to be adopted to make the part. The material selection primarily depends upon its properties and several other factors like availa

admin

admin

 

Discuss the effect of temperature on zinc and zinc alloys.

Temperature has pronounced effect on the properties of zinc and zinc alloys. The creep resistance, in particular, decreases rapidly with increasing temperature. Ductility and general fabricating characteristics increase with temperature. Drawing and forming operation should never be attempted below 20°С. More severe operations can be performed readily at temperatures above 50°C. Zinc alloys become somewhat brittle below 0°C, depending on the particular composition, but recover their normal prope

admin

admin

 

What do you understand by season cracking in brasses and how it can be prevented ?

Season cracking is spontaneous cracking which occurs on exposure to atmospheric corrosion in brass objects with high residual tensile stresses at the surface. It occurs with high-zinc brasses but rarely with 15 per cent zinc or below. Alloys susceptible to spontaneous season cracking will crack when exposed to corrosive conditions under high service stress, even if they are free from internal strains. Season cracking can be prevented by avoiding the production of internal microstresses or by rem

admin

admin

 

State, with reasons, suitable material for the manufacture of each of the following, giving the approximate composition : (a) a brass for deep pressed containers;

State, with reasons, suitable material for the manufacture of each of the following, giving the approximate composition : (a) a brass for deep pressed containers; (b) a brass for small machined bolts ; (c) a bronze for the impeller of a sea-water pump.   (a) The suitable brass for deep pressed containers is the admiralty brass containing copper and zinc in the proportion of 7 to 3, with 1% of tin. The addition of tin to the basic cartridge brass (70% copper, 30% zinc), gives

admin

admin

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Blog Statistics

    435
    Total Blogs
    812
    Total Entries





×
×
  • Create New...