1.1 This practice details procedures for establishing the directstress and shear stress damage-based design values for use in thedamage-based design criterion for FRP vessels and other compositestructures. The practice uses data derived from acoustic emissionexamination of four-point beam bending tests and in-plane sheartests (see ASME Section X, Article RT-8).
1.2 The onset of lamina damage is indicated by the presence ofsignificant acoustic emission during the reload portion ofload/reload cycles. "Significant emission" is defined with historicindex.
1.3 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in brackets are mathematicalconversions to SI units which are provided for information only andare not considered standard.
1.4 This standard does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.