Analysis of Service life, Design life and Storage - Trying to find an example report

J

johnjbart

Hello,

I'm trying to find an example report for the Service life and design life.

" The product shall be durable, damage tolerant, fault tolerant, fatique resistant, corrosion resistant" this is the contructual requirement. Its verification method is by analysis. How can we do it.?
Anybody knows.?

thanks in advance.
nothing can be held in suspension..
 

Jim Wynne

Leader
Admin
johnjbart said:
Hello,

I'm trying to find an example report for the Service life and design life.

" The product shall be durable, damage tolerant, fault tolerant, fatique resistant, corrosion resistant" this is the contructual requirement. Its verification method is by analysis. How can we do it.?
Anybody knows.?

thanks in advance.
nothing can be held in suspension..

Those are all subjective terms and if your company accepted a contract without further specificity, you are likely to have problems. You need to have the customer define what's meant by "durable," for example, and then you can devise a test (if necessary) to verify whether the requirement has been met.
 

Miner

Forum Moderator
Leader
Admin
johnjbart said:
Hello,

I'm trying to find an example report for the Service life and design life.

" The product shall be durable, damage tolerant, fault tolerant, fatique resistant, corrosion resistant" this is the contructual requirement. Its verification method is by analysis. How can we do it.?
Anybody knows.?

Durability can be quantified by developing a standardized life test, testing units to failure, analyzing by Weibull analysis (or similar method) and establishing a specification such as a minimum B10 life requirement. This is not the only method, but is a relatively simple one.

Damage tolerance would require a standardized test such as an impact or drop test with specifications developed for a minimum impact force or minimum drop height without damage.

Fault tolerance needs a lot more definition before I could help on this one.

Fatigue resistance could be treated similar to durability with the test designed to test fatigue. An example would be bending a wire 90 degrees for x number of cycles to failure.

Corrosion resistance has existing standardized tests such as salt spray and is usually specified as a minimum number of hours.
 
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