Finite Element Analysis Of Composite Materials
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First Published - 1992
Softback - 73 Pages
This review is carried out in accordance with the requirements of
the Specification set out in a document “Composite Structures
by F.E Analysis” prepared by the NAFEMS General Technology
Working Group, dated April 6th 1989 updated by the Statement of
Interest submitted by ITET, Aug 7th 1989 and a letter from Prof.
G.A.O Davies dated Sept 28th 1989.
The aims of the review:
- To review the needs of a composite pre-processing package whether
this be self-contained or embedded/coupled with an existing
commercial F.E. code. The needs should include assembly of material
stiffness properties for specific elements from data supplied by a
user in terms of all lamina properties, including stacking
sequence. Attention should be paid to material -, laminate- and
element- local / global orientations.
- To address the various fibre and matrix failure criteria needed,
including through-thickness effects with direct stresses and
interlaminar shears. Special elements or routines may be needed for
local features where the three dimensional effects are significant.
- To assess the capability of codes claiming to have composite
features, with respect to items 1 and 2 above; to address user
friendly features in interfacing with main F.E. programs and
displaying results, whether with or without a commercial
- To highlight weaknesses in codes either via a checklist or by
quantitatively descriptive summaries if these weaknesses are common
or generic. The checklist should be publishable, with codes named.
- If important features are identified, to propose a few benchmarks
and to try these out on one code. Benchmark presentations should
aim to follow single page formats adopted by NAFEMS in the past
issues of “Benchmark”.
- To identify whether codes have local UK support in addition to
supply of documentation. Features of codes necessary for any F.E.
analysis are not to be reviewed: only the special composite
features, including special elements such as sandwich plates.
1. Introduction & Restatement of aims
2. Systems Reviewed (in categories)
3. Engineers’ Requirements for Composite Analysis
- 3.1 Overview
- 3.2 Material Representation
- 3.3 Geometry and Topology
- 3.4 Modelling and Element Formulation
- 3.5 Solution Capabilities
- 3.6 Stress and Strain Recovery
- 3.7 Failure Assessment
4. Review of Systems’ Capabilities
- 4.1 Physical Representation and Pre-processing
- 4.2 Analytical Modelling and Solution
- 4.3 Results Recovery and Post-processing
5. Simple Tests for System Capability and Performance
- 5.1 Description and Aims or Proposed Tests
- 5.2 Some Test Results and Comments
- 5.3 Suggestions for NAFEMS Benchmarks
6. Proposed Extension of Task
- 6.1 Completion of Test Reporting
- 6.2 Benchmark Development
7. Summary and Conclusions