Failure Modes in Unidirectional Composites under Transverse Loading

1997 ◽  
Vol 16 (1) ◽  
pp. 33-49 ◽  
Author(s):  
G. P. Tandon ◽  
R. Y. Kim ◽  
R. E. Dutton
Keyword(s):  
Failure Modes ◽  
Transverse Loading ◽  
Unidirectional Composites

Some Results and Issues in the Non-Destructive Evaluation of Sandwich Composite Structures

2001 ◽  
Author(s):  
Emmanuel O. Ayorinde ◽  
Ronald F. Gibson ◽  
Feizhong Deng
Keyword(s):  
Composite Structures ◽  
Failure Modes ◽  
Sandwich Beam ◽  
Sandwich Composite ◽  
Glass Composite ◽  
Transverse Loading ◽  
Three Point Bending ◽  
Damage States ◽  
Vibration Modal ◽  
Non Destructive

Abstract This paper focuses on the use of basic NDE methods like ultrasonics, imaging and vibration testing to assess the integrity of some sandwich composites which have been subjected to transverse loading. Samples of a foam core, glass composite facing sandwich beam of varying thicknesses and end notch lengths were tested in three point bending and assessed by these NDE methods. The results show that core shear and indentation failures appear to be the prominent failure modes for these geometries and materials, and that changes in the damping and vibration modal frequencies of the beams can indicate damage states.

scholarly journals Static energy absorption capacity of grid stiffened composite plates

2021 ◽  
Vol 13 (1) ◽  
pp. 88-92
Author(s):  
Richa Chauhan ◽  
Anindya Bhar
Keyword(s):  
Energy Absorption ◽  
Failure Modes ◽  
Composite Plates ◽  
Absorption Capacity ◽  
Matrix Cracking ◽  
Test Results ◽  
Transverse Loading ◽  
Energy Absorption Capacity ◽  
Static Energy ◽  
Point Bend

This paper presents an experimental study on the energy absorption capacity of iso-grid and ortho-grid stiffened composite plates under transverse loading. The 3-point bend test has been performed to investigate the energy absorption behavior of grid stiffened composite plates. The test results show that energy absorption capacity up to failure is improved when the load is applied on the rib side. The ortho grid stiffened structure shows a higher energy absorption capacity after failure when loaded at the rib side. The main failure modes in grid stiffened composite plates are rib fracture, matrix cracking and delamination over the skin.

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