Use of Carbon Fiber Reinforced Plastics (CFRP) and
other composite materials in transportation equipment,
beginning with automobiles, has begun in response to
calls for reduction of body weight to reduce
environmental impacts. Unlike metal materials,
composite materials have a complex internal structure
and display complex fracture behavior, depending on
the principal axis of applied stress, and this has made it
difficult to establish highly accurate structural analysis
models. Structural analysis simulation techniques such
as CAE (Computer Aided Engineering) are widely used
in design development of transportation equipment.
Improved reproducibility of CAE analysis is expected to
increase efficiency and reduce costs in development
work, and to improve the reliability of the designs of
complex structures and large-scale structures, which is
difficult to assess by actual measurement.
In conventional product design development, there was
a time when design work was considered complete with
only CAE analysis. Today, however, actual measurement
under the same conditions as the CAE analysis model
and verification by comparison of those results and the
CAE analysis results to validate the appropriateness of
the simulation results (V&V: Verification and Validation)
is considered important. As a result, product design
utilizing both actual measurement and CAE analysis is
becoming a general social requirement.
This article presents an outline of the distinctive
features of composite materials related to CAE analysis,
and based thereon, introduces examples of V&V by
comparison of the CAE analysis results with the results
of actual measurements of a Carbon Fiber Reinforced
Thermo Plastics (CFRTP) fabric material.