Loading...
Please wait, while we are loading the content...
Similar Documents
Computational simulation of composite behavior
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Mital, Subodh K. Keith Jr., Theo G. |
| Copyright Year | 1997 |
| Description | Composite microfracture technique developed here is based on the concept of global strain energy release rate. Step-by-step procedures were outlined to evaluate composite microfracture. The technique can predict microfracture initiation/propagation, predict the "structural fracture toughness", and establish the hierarchy of fracture modes. Both unidirectional and cross-ply metal-matrix composite laminates were evaluated for microfracture, subjected to thermal and mechanical loads. Five NASA reports were published as shown in the bibliography and several presentations were made at the technical conferences/ symposia. Work was also performed to develop simplified micromechanics and macromechanics for ceramic matrix composites. A novel fiber sub-structuring technique was developed, which divides the fiber into several "slices" and applies the micromechanics equation at the "slice" level, which are then integrated upwards to get the ply and the laminate properties. It allows for a more accurate representation of interfacial conditions such as partial interface bond etc. It also predicts the stress-strain behavior of a composite up to failure by taking into account material properties dependence upon temperature as well as stress redistribution that occurs due to damage initiation and propagation. A computer code CEMCAN (Ceramic Matrix Composites Analyzer) which includes all these capabilities has been developed as a part of this research activity. |
| File Size | 107888 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980004826 |
| Archival Resource Key | ark:/13960/t4fn63s66 |
| Language | English |
| Publisher Date | 1997-12-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Microcracks Ceramic Matrix Composites Joints Junctions Strain Energy Release Rate Micromechanics Fractures Materials Stress-strain Relationships Simulation Metal Matrix Composites Ply Orientation Fracture Strength Failure Loads Forces Crack Initiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
