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The reality of English living rooms – A comparison of internal temperatures against common model assumptions

Submitted by Laure Ballu on
research
BREDEM;Building stock models;Heating demand temperature; Heating duration; Internal temperature; Variability

Highlights of this open access article published in Energy and Buildings:

'Innovative solutions please, as long as they have been proved elsewhere: the case of a polished lime-pozzolan concrete floor'

Submitted by Laure Ballu on
research
innovation; implementation; polished lime-pozzolan concrete; case-study; univerity of Bath; Ramboll

Highlights of this open access article published in Case Studies in Construction Materials:

Heating patterns in English homes: national survey vs common model assumptions

Submitted by Laure Ballu on
research
Heating patterns; Heating demand temperature; Heating duration; Occupancy schedules; Building stock models; BREDEM; UCL Energy Institute

Hightlights of this open access article published in Building and Environment:

• Building stock models need to revise some of their assumptions on space heating.

• Weekends and weekdays are similar in their heating pattern and duration.

• Estimated heating demand temperature is slightly lower than the assumed 21 °C.

• Homes differ widely in their hours of heating and their demand temperature.

Crack length measurement

Submitted by faizan.iitm on
research
Crack length measurement

I am trying to measure J - integral from experiment. " Let my initial fatigue crack length is 6mm, then i did single specimen unloading compliance test on it. The crack legth increased to 8mm" If i want to model the same geometry in FEA. Now my doubt is that "what carck length should i take 1) Initial fatigue crack = 6mm 2) final crack length  = 8 mm.................... Note: I need to model my CT specimen in FEA  to correct my experiments :-)

Parallel Multiscale modeling in ABAQUS using UMAT

Submitted by musiddiqui on
research
UMAT
multiscale modeling
parallel processing

Hello everyone,

I am currently in the process of implementing a multiscale modeling approach in ABAQUS/Standard.

Here is what I am doing.

Macroscale ABAQUS model <--> UMAT <--> Python script <--> Microscale ABAQUS model

So basically the microscale model is being called at every macroscale integration point. The UMAT passes the required data to python as command line arguments and the python script returns the stress and tangent modulus in a text file.

instability induced by incoherent twin boundary in nanotwinned copper

Submitted by Rongmei niu on
research
TEM
nanotwinned copper
coherent and incoherent twin boundary

1. Strain hardening and softening in nanotwinned Cu:

Nanotwinned Cu foils with about 99% coherent twin boundaries (TBs) among all the boundaries were made. These coherent

TBs, with an average spacing of 25 nm, were engineered approximately parallel to foil surfaces. Low plane-strain deformation

enhances the hardness by refining microstructure and introducing dislocations. High plane-strain deformation results in crystallographic

lattice rotation and reaction between dislocations and coherent TBs, and induces incoherent TBs, thus twin coarsening and

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