Section 1 General
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Special Service Craft, July 2022 - Part 8 Hull Construction in Composite - Chapter 7 Failure Modes Control - Section 1 General

Section 1 General

Parent topic: Chapter 7 Failure Modes Control

1.1 Application

1.1.1 The requirements of this Chapter are applicable to mono-hull and multi-hull craft of composite construction as defined in Pt 8, Ch 1, 1.1 General.

1.2 General

1.2.1 The failure modes criteria contained within this Chapter are to be used in formulae from the preceding Chapters to determine the scantling requirements. In addition, they are to be used when direct calculations are proposed as an alternative.

1.3 Symbols and definitions

1.3.1 The symbols and definitions applicable to this Chapter are defined below or in the appropriate Section.

f δ = span/deflection ratio

1.3.2 The slamming zone area referred to in this Chapter is defined as the region where the operational non-displacement mode pressures exceed the operational displacement mode pressures.

1.4 Direct calculations

1.4.1 The requirements of this Section may be modified where direct calculation procedures are adopted to analyse the various failure modes.

1.5 Equivalents

1.5.1 Where direct calculations are proposed, the requirements of Pt 3, Ch 1, 2 Direct calculations are to be complied with.

1.5.2 In addition, with the agreement of Clasifications Register (hereinafter referred to as 'LR'), tests may be conducted to demonstrate the actual response of the structure and the results verified against the failure mode criteria in this Chapter.

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