SAMPE Journal - March/April 2016 - 24
Feature Article
Figure 1. General building
block approach.
and durability concerns will dictate the full scale
testing requirements at the other end of the building
block. The full-scale testing could be proof loading to
a critical design limit load, proof loading at various
environmental conditions, static tests to design limit
load and design ultimate load, and in some cases
static loading to failure. In addition, damage tolerance
and durability (fatigue) testing may be required to
ensure safety for flight critical structures and prove
long term acceptable lifetime. Constructing a building
block programme is usually a matter of organizing
all specific testing and analysis methodologies in a
rational manner.
The first group in the general building block
approach (Group A) aims to define the material
behaviour (Figure 1). Because numerous tests are
usually required at this stage, these are performed
on less complex specimens. One of the important
outcomes of this group of blocks is the development
of material allowables for design (i.e., material
properties statistically derived from test data). The
objectives of Group B are to develop design values
(i.e., material property or load value that takes into
consideration programme requirements and has
been approved for use in the design). Unlike tests
in Group A, design-value tests usually require a
preliminary sized configuration of the final structure.
Finally, in Group C all tests related to the final stage of
the certification process for static and fatigue loading
are included.
Based on the guidelines outlined in MIL-HDBK-17
for business and private aircraft and talking into
consideration the particular requirements of the
current research and development programme, the
building block approach illustrated in Figure 2 has
been drawn.
Figure 2. Building block approach for the
integrated lattice fuselage section.
24
SAMPE Journal, Volume 52, No. 2, March/April 2016
Table of Contents for the Digital Edition of SAMPE Journal - March/April 2016
Contents
SAMPE Journal - March/April 2016 - Cover1
SAMPE Journal - March/April 2016 - Cover2
SAMPE Journal - March/April 2016 - Contents
SAMPE Journal - March/April 2016 - 2
SAMPE Journal - March/April 2016 - 3
SAMPE Journal - March/April 2016 - 4
SAMPE Journal - March/April 2016 - 5
SAMPE Journal - March/April 2016 - 6
SAMPE Journal - March/April 2016 - 7
SAMPE Journal - March/April 2016 - 8
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