NDT of Carbon-NOMEX (honeycomb core) composite: Dynamic loading on a large yacht hull

Mari­ne NDE (Spain) used the tech­ni­cal advan­ta­ges of our She­aro­gra­phy-Sys­tem espe­cial­ly in com­bi­na­ti­on with the dyna­mic exci­ta­ti­on for non-dest­ruc­ti­ve exami­na­ti­on (NDE) of lar­ge are­as such as com­ple­te yacht hul­ls (see image below). The hull with a lenghts of 30,5m was a car­bon-fir­ber-com­po­si­te and part of high per­for­mance sai­ling yacht in build. Becau­se of the full-field method (100% of the inspec­ted area is exami­ned), the tes­ting of the ent­i­re hull requi­red only 240 shots, in three workdays.

 

The yacht hull con­sists of a sand­wich con­struc­tion, whe­re are in par­ti­cu­lar used honey­comb cores (NOMEX).

Marine NDT1Marine NDT2

 

 

 

 

 

 

On the left — A she­aro­gram of a detec­ted bon­d­ing defect (in red oval). The yel­low X marks the loca­ti­on of the core sam­ple shown at the right. The dest­ruc­ti­ve test con­firms the shearogram’s indi­ca­ti­on that the­re is a signi­fi­cant never-bond bet­ween the honey­comb core mate­ri­al and the film adhe­si­ve in this area.