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scale effects before testing
hi !
i'm just about to design some smaller specimens in order to validate my calculations on a bigger fiber reinforced polymers(frp) sabdwich bridge deck. my materials are glass fiber as faces and balsa as core. my question: where do i get additional information about how to design a smaller deck while taking into account the stress states in the real bigger construction ? i know the dimensions and stress state of the real construction.
thanks
patrice

this is difficult to do with a high comfort level of accuracy. composites often combine materials that exhibit non-linear behavior or 2nd order effects with more linearly predictable materials. the result in full scale is usually desirable, but as we reduce the scale (if you are considering a true scaling of all dimensions/parameters)the individual affects become more pronounced.
i would suggest a smaller piece of the structure, but maintain full scale. restraint conditions are usually easier to accomodate than scaling issues.
ron
hi ron !
thanks for your suggestion. i'll try the smaller piece of structure with maintained full scale using fem first.
patrice

2009-09-15, 08:05 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	scale effects before testing scale effects before testing hi ! i'm just about to design some smaller specimens in order to validate my calculations on a bigger fiber reinforced polymers(frp) sabdwich bridge deck. my materials are glass fiber as faces and balsa as core. my question: where do i get additional information about how to design a smaller deck while taking into account the stress states in the real bigger construction ? i know the dimensions and stress state of the real construction. thanks patrice this is difficult to do with a high comfort level of accuracy. composites often combine materials that exhibit non-linear behavior or 2nd order effects with more linearly predictable materials. the result in full scale is usually desirable, but as we reduce the scale (if you are considering a true scaling of all dimensions/parameters)the individual affects become more pronounced. i would suggest a smaller piece of the structure, but maintain full scale. restraint conditions are usually easier to accomodate than scaling issues. ron hi ron ! thanks for your suggestion. i'll try the smaller piece of structure with maintained full scale using fem first. patrice __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]