Materials R. Bates

Contents What we said that we would do What we have done – What is left to do from original list New things to add

What we said that we would do Thermal conductivity measurements of bulk materials – Gather significant number of samples of existing materials and new materials – Irradiate – Prepare samples with different moisture content Thermal conductivity measurements of adhesives and co-cured items – Prepare a range of co-cured samples – Prepare a range of adhesive samples – Irradiate Young's Modulus measurements (in compression, tension and shear) – Collect and prepare samples – Irradiate – Prepare samples with different moisture content Measurement of coefficient of thermal expansion – Prefect measurement techniques – Collect samples – Irradiate – Prepare samples with different moisture content

What we have done Thermal conductivity of bulk materials – PocoFoam and Allcomp foam Measured in-plane and transverse conductivities Measured in-plane for a range of temperatures (-30 o C to 20 o C) – Bus Tape – Have not irradiated samples for post-irradiation testing – No moisture absorption work Thermal conductivity measurements of adhesives and co-cured items – Adhesives:Hysol, Hysol + BN, DC SE4445, IRS 2125 – Co-cured items: CFRP 3ply K13D2U and K13C2U cyanate ester RS3 resin – Measured – Irradiated Hysol + BN – No moisture absorption work – Need to irradiated DC and IRS (or others) – Not done a proper survey of available adhesives

What we have done Young's Modulus measurements (in compression, tension and shear) – PocoFoam, Allcomp Foam, CFRP – More work on Allcomp required – Shear measurements – No post irradiation measurements – No moisture absorption work Measurement of coefficient of thermal expansion – This has not really started

New things to add to list Thermal test of sandwich under shear stress – Done for PocoFoam, repeat for Allcomp Foam to pipe interface – What is this resistance really? – What variation do we expect? Understand in-plane conductivity in CFRP – Does it scale as we expect? QA testing of CFRP to understand quality of uncured and cured materials – Follow up on Georg’s work – Need to understand available effort Creep tests of DC4445 joint – Method in place with DMA, need effort at RAL Strength of facing to honeycomb – Tim is following this work post irradiation Bend tests of plank samples post irradiation – Tim is following this work