When I traveled in China in June, I was once again irritated by the Internet. It was often slow and broken. Many important services are inaccessible, blocked by someone. Why would someone do that?
But I found my Chinese colleagues extremely well interconnected. Everyone has a cell phone. They actually use their cell phones!
I'll be teaching an undergraduate course on engineering thermodynamics. We will use the textbook by Cengel and Boles. I will supplement the textbook using my own notes on thermodynamics. Teaching this course will give me an opportunity to revise these notes and add new pieces. Here are notes for the opening lecture.
The initial issues of Extreme Mechanics Letters are freely accessible. We look forward to receiving your submissions. Your contribution will help to build this home of mechanicians.
Editors-in-Chief
Jimmy Hsia, Carnegie Mellon University
与中国一起走向世界，与世界一起走向未来
锁志刚
西安交通大学毕业典礼，2015.6.27
尊敬的张迈曾书记，尊敬的王树国校长，
各位嘉宾，各位老师，各位同学，各位家长，
大家上午好！
感谢学校让我作为校友在毕业典礼上致辞。年轻的同学们，我想和你们谈一个大家都关心的话题：机会。
三十年前，也就是一九八五年，我从西安交通大学本科毕业。毕业典礼上，汪应洛副校长讲话。主题是技术革命与中国振兴。当时技术革命的热点是光纤维。当时普遍认为中国比发达国家落后几十年，赶超世界是一个遥远的梦想。汪应洛教授指出，中国不需要走西方的老路，不需要先普及电话，再建设互联网。在光纤维的时代，中国与世界站在同一个起跑线上。光纤维是中国振兴的一个机会。
A state of stress in a body. Components of stress. Subject to a load, a body develops internal forces. The distribution of the internal forces in the body is usually inhomogeneous. For example, when a rod is bent, part of the rod is in tension, and the other part of the rod is in compression.
If the internal forces are uniformly distributed in the body, the body is said to be in a homogeneous state of stress. For brevity, we often say a state of stress, or just stress.
This question was raised repeatedly when the journal Extreme Mechanics Letters was getting ready to launch. The editorial board did put together the aim and scope. But the journal has its own life. Once launched, it has been shaped by the community.
The attached notes are written for a course on plasticity. When I update the notes, I will post a link on my twitter account: https://twitter.com/zhigangsuo.
Rheology is the science of deformation. This science poses a question for every material: Given a history of stress, how do we predict the history of strain, or the other way around?
The attached notes are written for a course on plasticity. When I update the notes, I will post a link on my twitter account: https://twitter.com/zhigangsuo.
The attached notes are written for a course on plasticity. When I update the notes, I will post a link on my twitter account: https://twitter.com/zhigangsuo.
I have just updated my notes on nonlinear viscosity. The notes are written for a course on plasticity. When I update the notes, I will post a link on my twitter account: https://twitter.com/zhigangsuo.
