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Design Considerations for Composite Hydraulic Structures

Over the past 15 to 20 years, hydraulic structures using FRP composites have been designed, manufactured and installed in several countries, including the United States, the Netherlands, Spain, China, the United Kingdom and France. Many of the original waterway navigational structures around the world have far exceeded their original design life – some to the […]

The post Design Considerations for Composite Hydraulic Structures appeared first on Composites Manufacturing Magazine.

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Over the past 15 to 20 years, hydraulic structures using FRP composites have been designed, manufactured and installed in several countries, including the United States, the Netherlands, Spain, China, the United Kingdom and France. Many of the original waterway navigational structures around the world have far exceeded their original design life – some to the point of failure. Corrosion-resistant, low-maintenance composite hydraulic structures are poised to take their place in locks, dams, levees, pump stations and other systems that involve valves, gates, walls, piling, mooring facilities and more.

As in any composite application, careful examination of design considerations for hydraulic structures are paramount. Because the market encompasses a bevy of structures and accompanying components, it’s impossible to cover specific design principles within this column. For instance, the design process for a vertical lift gate varies from that of a stoplog on a dam. However, there are several overarching considerations, five of which are presented here: design requirements, material selection, structural concepts, deflection requirements and cost.

Before examining those considerations, it’s important to note work that has already been done to create best practices and design standards for hydraulic structures. In 2018, the U.S. Army Corps of Engineers led publication of a guide specification entitled “UFGS 35 20 15 FRP Composites for Low-Head Water Control Structures” that covers stoplogs, vertical lift gates, weir dams and more.

Another effort is currently underway by PIANC, the World Association for Waterborne Transport Infrastructure. In order to identify “best practices” of composites in the hydraulic structures market and develop applicable guidance documents, PIANC established an international working group – WG-191, Composites for Hydraulic Structures – in 2016. The WG-191 has developed a draft report entitled “Composites for Hydraulic Structures,” which was submitted to PIANC’s Inland Navigation Commission in February for review, editing and publication.

The report summarizes state-of-the-art FRP composites for hydraulic structures, including material characterization, engineering (science) evaluations, design, construction, repair and cost analyses. Emphasis is placed on successful applications of composites in waterfront, marine and navigational structures, such as lock doors, gates, in-situ and under water repair, and flood protection systems.

In particular, the report highlights several applications of FRP composites for hydraulic structural systems that enhance durability, reduce downtime to replace or rehabilitate traditional structures, reduce embodied energy and exhibit other advantages. (Two of the applications are depicted in this column.) Ideally, the contents of this report will help designers and promoters of hydraulic structures by providing guidance to develop and operate safe, economical, durable structural systems for waterways utilizing FRP composites.

Source: http://compositesmanufacturingmagazine.com/2020/05/design-considerations-for-composite-hydraulic-structures/

Manufacturing

145 – Revisited: James Eden, Private White V.C.

In this episode, I revisit an interview I did back in 2018 which is still very relevant today. It’s a ‘no holds barred’ interview with James Eden, owner of Private White V.C. who tells me how he’s turned a clothing factory that solely manufactured for other brands, including Burberry, into one that makes 90% own-brand…

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In this episode, I revisit an interview I did back in 2018 which is still very relevant today.

It’s a ‘no holds barred’ interview with James Eden, owner of Private White V.C. who tells me how he’s turned a clothing factory that solely manufactured for other brands, including Burberry, into one that makes 90% own-brand luxury clothing sold direct to the customer.

Find out how (and why) James took on this challenge and his unique costing policies which have helped his business stand out in the crowd.

It’s great advice for any British-made brand or UK manufacturer.

Discover

  • The history behind the Private White V.C. brand
  • Why James decided to switch his factories production from solely manufacturing for other brands to launching his own label
  • Advice he’d give to other manufacturers that want to launch their own brand
  • The challenges the factory faced when supplying big brands and retailers
  • The pros and cons of selling wholesale
  • How he’s flipped his pricing strategy on its head and the reaction that it’s had with their customers
  • His decision to offer transparent costings
  • Why good design is so important
  • His thoughts on Black Friday – “zero discount on everything”
  • How to build a loyal customer base
  • His initiatives to recruit and develop staff and skills

Source: https://makeitbritish.co.uk/podcast/145-revisited-james-eden-private-white-v-c/

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Manufacturing

Building Fundamentals of Manufacturing

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If you were to recommend books or websites to help a new hire build up their fundamental knowledge of manufacturing, what might they be? Topic overviews would cover material considerations, different manufacturing processes, basic history, why different countries seem to focus on different categories of manufacturing for the export market (textiles v automotive v electronics), optimization and DFM, Quality Control methodology, outsourcing considerations, basics of logistics, rapid prototyping, etc…

Also, any that might be good candidates for a team book club.

Sorry if this just an insanely broad question. An example of what I personally found helpful are Paul Midler’s books and posts on manufacturing in China.

Source: https://old.reddit.com/r/manufacturing/comments/jzxq05/building_fundamentals_of_manufacturing/

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Manufacturing

Future of manufacturing

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I’d like to ask everyones help in imaging what US manufacturing will become. In my area (Houston) oil and gas manufacturing is huge. I think O&G employs almost 20% of the entire metro area! But it’s clear that the global desire for oil is on the decline which means there will be a vacuum within the manufacturing sector. In addition the sentiment of the country seems to be wanting to move away from plastics and other products with a negative environmental impact.

How do we shift US manufacturing moveing away from O&G and the numerous industries that surround it in a way that supports both business owners and working class employees?

Source: https://old.reddit.com/r/manufacturing/comments/jztwpg/future_of_manufacturing/

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