https://www.designingbuildings.co.uk/w/index.php?action=history&feed=atom&title=Cyclic_stress 2026-05-30T14:10:47Z Revision history for this page on the wiki MediaWiki 1.17.4 https://www.designingbuildings.co.uk/w/index.php?title=Cyclic_stress&diff=235804&oldid=prev 2022-07-29T06:22:22Z

<p>Created page with &quot;[https://www.bsria.com/uk/product/oBKvLD/illustrated_guide_to_hot_and_cold_water_services_bg_332014_a15d25e1/ The Illustrated Guide to Hot and Cold Water Services (BG 33/2014)], ...&quot;</p> <p><b>New page</b></p><div>[https://www.bsria.com/uk/product/oBKvLD/illustrated_guide_to_hot_and_cold_water_services_bg_332014_a15d25e1/ The Illustrated Guide to Hot and Cold Water Services (BG 33/2014)], written by Reginald Brown and published by BSRIA in 2014, in relation to cyclic stress, it states: ‘If materials are repeatedly stressed then they can develop stress cracks. These cracks form at a stress concentration point such as a sharp bend, thread root or even a surface marking. The risk of stress cracks and failure depends on the degree of stress and the number of cycles. It is permissible to use a change in direction to absorb the effects of thermal expansion and contraction (copper tube expands at a rate of 16.8 × 10-6 per °C between 20°C and 100°C) but there are guidelines on the maximum that can be absorbed. If the amount of movement is too large for an elbow then a bend or loop will decrease the stress. Guidance and calculations for the accommodation of expansion are given in CIBSE Guide B.’<br /> <br /> --[[User:BSRIA|BSRIA]]<br /> <br /> = Related articles on Designing Buildings =<br /> <br /> * Approved Document H.<br /> * BSRIA articles.<br /> * BSRIA definitions.<br /> * Corrosion.<br /> * Cracking and building movement.<br /> * Microbiologically influenced corrosion.<br /> * Pitting.<br /> * Stress corrosion cracking<br /> * Water.<br /> <br /> [[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:Definitions]] [[Category:Water]]</div>

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