# mechanician

## 著名力学家叶开沅先生逝世

、甘肃省科协原常委、兰州大学力学专业和学科的创始人、兰州大学力学系首任主任、名誉

叶开沅，男，汉族，1926年5月19日出生于浙江省衢州市。1938年至1943年，在浙江省

## Boundary Element Method For Fracture Mechanic.

Dear Freinds,

I need help to develop a boundary element code for FRACTURE Mechanics applications (for Isotropic & Laminated structures).

## Do I really belong here?

Greetings iMechanicans

I've been struggling with a optics project for almost 3 years. I say struggle because my lack of a formal physics education leaves an accurate hypothesis out of my reach. I understand solid-state physics, as well as electromagnetic wave theory from my 40+ years of experience and research in these fields.

I hope to spark the mind(s) of anyone who could possibly explain an optomagnetic anomaly that results from this simple Superparamagnetic event that I've created.

Should I leave and try to find the answer elsewhere?

## How could we use the energy of the high speed air, which is coming out from a pipe to the atmosphere?

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Without increasing the pressure in the outlet of the pipe?

I mean we want to transfer air from point A to point B using a piping system which is equipped with a fan. Now there is energy lost in the outlet because the air exits with velocity in the atmospheric pressure, so the problem is how to use this energy ( high speed air) without increasing the pressure in the outlet of the fan. offcourse if it was water instead of the air, we could get the energy by installing a turbine next to the outlet pipe and still let the water come out in the atmospheric pressure