OS-C501

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Offshore Standard DNV-OS-C501, November 2013 Sec.5 Materials – sandwich structures – Page 96 8.10 Confirming material data by component testing See Sec.4 [8.11]. DET NORSKE VERITAS AS
Offshore Standard DNV-OS-C501, November 2013 Sec.6 Failure mechanisms and design criteria – Page 97 SECTION 6 FAILURE MECHANISMS AND DESIGN CRITERIA 1 Mechanisms of failure 1.1 General 1.1.1 A mechanism of failure is the underlying phenomenon at the material level that determines the mode of failure. Depending on its level of severity a mechanism of failure can lead to various failure modes. For example, matrix cracking can lead to seepage of a fluid through the laminate or lead to fracture depending on the severity of the cracks. Failure mechanism can be regarded as the cause of failure and failure mode as the effect. The failure terminology used in this standard is shown in Figure 6-1. Guidance note: Local and global failure shall be distinguished. On a material level, failure tends to be local, i.e. over an area of a few cm 2 , or even less. This local failure may have global consequences immediately, or after some growth with time. In some cases, the local failure does not grow and does not have any global consequences and does not effect any of the design requirements of the structure. In such a case local failure may be acceptable. ---e-n-d---of---G-u-i-d-a-n-c-e---n-o-t-e--- 1.1.2 Only failure mechanisms that are related to critical failure modes, as identified in Sec.3 should be considered. DET NORSKE VERITAS AS
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