A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Compressive response and failure of braided textile composites: Part 1 - Experiments
Experimental results obtained by examining the planar biaxial compression/tension response of carbon 2D triaxial braided composites (2DTBC) are reported in this paper. These experiments were motivated by a need to examine the failure of 2DTBC in a state of stress that would be similar to what is experienced by the walls of a tubular member under compressive crush loads. Results obtained from a series of biaxial tests that were conducted with different proportional displacement loading ratio combinations of compression and tension are reported. In all cases, the dominant failure mechanism under such a stress state is the buckling of the bias and axial tows within the composite. Full field surface displacement data is acquired concurrently during all biaxial and some uniaxial tests using the technique of digital speckle photography. Digital images of the specimen surface that is illuminated with a He-Ne laser are acquired at discrete time intervals during the loading history using a high-resolution digital camera. These images are stored and analyzed to obtain the incremental inplane surface displacement field, Delta u(x,y) and Delta ny(x,y). From these, the incremental inplane surface strains Delta epsilonx, Delta epsilony and Delta gamma xy are obtained by numerical differentiation. The present paper, which is the first in a two part series, is devoted to the biaxial experimental results pertaining to 2DTBC failure.
Compressive response and failure of braided textile composites: Part 1 - Experiments
Experimental results obtained by examining the planar biaxial compression/tension response of carbon 2D triaxial braided composites (2DTBC) are reported in this paper. These experiments were motivated by a need to examine the failure of 2DTBC in a state of stress that would be similar to what is experienced by the walls of a tubular member under compressive crush loads. Results obtained from a series of biaxial tests that were conducted with different proportional displacement loading ratio combinations of compression and tension are reported. In all cases, the dominant failure mechanism under such a stress state is the buckling of the bias and axial tows within the composite. Full field surface displacement data is acquired concurrently during all biaxial and some uniaxial tests using the technique of digital speckle photography. Digital images of the specimen surface that is illuminated with a He-Ne laser are acquired at discrete time intervals during the loading history using a high-resolution digital camera. These images are stored and analyzed to obtain the incremental inplane surface displacement field, Delta u(x,y) and Delta ny(x,y). From these, the incremental inplane surface strains Delta epsilonx, Delta epsilony and Delta gamma xy are obtained by numerical differentiation. The present paper, which is the first in a two part series, is devoted to the biaxial experimental results pertaining to 2DTBC failure.
Compressive response and failure of braided textile composites: Part 1 - Experiments
Quek, Shu-Ching (author) / Waas, A.M. (author) / Shahwan, K.W. (author) / Agaram, V. (author)
International Journal of Non-Linear Mechanics ; 39 ; 635-648
2004
14 Seiten, 11 Quellen
Article (Journal)
English
Braided textile composites under compressive loads: Modeling the response, strength and degradation
| British Library Online Contents | 2007
Response of braided composites under compressive loading
| British Library Online Contents | 1993
Modeling the transverse tensile and compressive failure behavior of triaxially braided composites
| British Library Online Contents | 2019
Influence of strain-rate on the uniaxial compressive behavior of 2-D braided textile composites
| British Library Online Contents | 2001
High strain rate behavior of 4-step 3D braided composites under compressive failure
| British Library Online Contents | 2007