2143 Study on damage development for braided composites under static tensile loading

2007 ◽  
Vol 2007.1 (0) ◽  
pp. 223-224
Author(s):  
Kenta Hamada ◽  
Tetsusei KURASHIKI ◽  
Hiroaki NAKAI ◽  
Masaru ZAKO
Keyword(s):  
Tensile Loading ◽  
Braided Composites ◽  
Damage Development ◽  
Static Tensile Loading ◽  
Static Tensile

Damage Observation of Glass Fiber/Epoxy Composites Using Thermography and Supported by Acoustic Emission

2014 ◽  
Vol 627 ◽  
pp. 187-190 ◽  
Author(s):  
Jefri Bale ◽  
Emmanuel Valot ◽  
Martine Monin ◽  
Peggy Laloue ◽  
Olivier Polit ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Glass Fiber ◽  
Epoxy Composite ◽  
Thermal Response ◽  
Tensile Loading ◽  
Destructive Testing ◽  
Ir Camera ◽  
Damage Propagation ◽  
Static Tensile Loading ◽  
Static Tensile

This work presents an experimental study to monitor the damage propagation of composite material by non destructive testing (NDT) method. In order to achieve this, an open hole condition of glass fiber/epoxy composite has been used as the specimen test under static tensile loading and observed using two different real-time monitoring techniques of NDT namely infra-red (IR) camera and supported by Acoustic Emission. The results show that the thermal response and acoustic emission signals give a good detection on damage appearance and damage propagation of glass fiber/epoxy composite under static tensile loading conditions.

Performance Evaluation of Notched Biaxial Braided Composites

2004 ◽  
Author(s):  
Jitendra S. Tate ◽  
Ajit D. Kelkar ◽  
Ronnie Bolick
Keyword(s):  
Composite Structures ◽  
Low Cost ◽  
Impact Resistance ◽  
High Volume ◽  
Manufacturing Cost ◽  
Braided Composites ◽  
Static Tensile Loading ◽  
New Process ◽  
Static Tensile ◽  
Potential Benefits

Braided composites have good properties in mutually orthogonal directions, more balanced properties than traditional tape laminates, and have potentially better fatigue and impact resistance due to the interlacing. Another benefit is reduced manufacturing cost by reducing part count. Because of these potential benefits braided composites are being considered for various applications ranging from primary/secondary structures for aerospace structures [1]. These material systems are gaining popularity, in particular for the small business jets, where FAA requires take off weights of 12,500 lb. or less. The new process, Vacuum Assisted Resin Transfer Molding (VARTM), is low cost, affordable and suitable for high volume manufacturing environment. Recently the aircraft industry has been successful in manufacturing wing flaps, using carbon fiber braids and epoxy resin and the VARTM process. To utilize these VARTM manufactured braided materials to the fullest advantage (and hence to avoid underutilization), it is necessary to understand their behavior under different loading and environmental conditions. This will reduce uncertainty and hence reduce the factor of safety in the design. It is well known fact that the strength of the composite structure reduces because of discontinuities and abrupt change in the cross-section. Accurate knowledge of strength and failure mechanism of notched and unnotched composites is very important for design of composite structures. This research addresses the behavior of notched braided composites under static tensile loading.

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