Questions related to Lightweight Structures
I have obtained my doctorate degree on the topic “Experimental Studies on Friction Stir Welded Joints of Magnesium Alloy”, from Inder Kumar Gujral Punjab Technical University, Kapurthala (Punjab). So far, I have published five research papers in SCI journals.
I want to continue my research on implementing the concept of weight reduction in automotive industries by using magnesium and other new lightweight alloys. I am looking for a postdoctoral fellow.
Could you help for the same?
Can a heavy weight wall (brick/adobe/blocks construction) that represents good thermal mass, be replaced by lightweight (wood) construction in hot climates?
Is there a way prefabricated light , cheap and mass produced solutions can replace and achieve the same results as a heavy construction and good thermal mass wall? Is it possible to use lower mass and get good results?
For climates where temperatures swings are a problem and mostly for hot dry climates (arid) such as the Saudi Arabian
We usually use Strain Energy as objective with volume constraint in topology tasks. But if I want to obtain a lightweight structure that the stress in it does not exceed material strength, I should optimize the structure with volume as objective function and a stress constraint.
During the iterations, the value of stress can exceed what I set for the constraint (say, I set stress constraint to be smaller than 785 MPa, but the output of the topology task has stress = 1.96e+5 MPa)
Anyone tried to use a stress constraint? How to deal with the errors? I just want to have an reasonable optimized shape. Thank a lot!
Topology optimization like SKO (Soft Kill Option) are kind of CAO (Computer Aided Optimization) tools to generate freeform shaped parts based on biological optimization rules.
If the house has an “inside” wall and “outside” wall , or if “inside and outside” sides of the wall can be considered different.
The project studies the possibility of a fixed core that is moved reallocated and socially recycled when given a different function and site ( including inside furniture, pluming, etc- off site- with an outside skin (second skin) that is more adapted to climate, local features and materials availability, etc. This second layer is placed in situ, so it should be lightweight, easy to erect, depend on local techniques and available expertise and mostly be easy to be taken out (disassembled and replaced)
The project considers the possibility of using a brick layer inside to guarantee a good thermal capacity against temperatures swings and 2 options for the outside layer : 1. Brick - meaning a double brick wall construction; 2- wood - constituting a brick+wood wall to make it easier the outside to be “disassembled” or replaced.
If in Denmark a wall is wood+wood and depends on insulation to keep the cold out (not really big temperatures swings, but cold temperatures), in Angola, temperature swings make it bad for the use of a lot of insulation (or insulation at all) once it would just overheat the house by having a too tight building envelope. Can Brick+wood construction achieve good results in Angola (or other hot dry climates) by allowing some good thermal mass (brick) that delays heating and cooling, but use wood outside to allow this second skin to be easily replaced and disassembled when necessary?
Wood solutions , as prefabricated elements (cheaper, mass produced)