Analysis of laminates with ply drops

Vidyashankar, B.R.; Mürty, A. V. Krishna

doi:10.1016/s0266-3538(01)00010-0

Cited by 49 publications

(20 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The related literatures of tapered laminated composites are reviewed briefly. Vidyashankar and Murty 24 analyzed load transfer of the composite laminates with ply drops. Kim et al 25 developed a variation method using stress function to predict the interlaminar stresses of the tapered laminates.…”

Section: Literature Reviewmentioning

confidence: 99%

Clamping force integrated computer aided tolerancing in composite assembly

Wang

Chen

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

Traditional computer aided tolerancing method could not accomplish the tolerancing and variation simulation well in composite assembly. The paper presents a clamping force integrated computer aided tolerancing method for composite assembly. The stochastic variations and the stackup of variations are affected by clamping forces. The clamping force modified probability distribution is used to represent the modification based on the verified FEA model of the composite assembly. The clamping forces are coordinated based on the main deformation mode extracted by the principal component analysis to satisfy the coaxial tolerance requirements of the composite assembly. The assembly of an aircraft composite elevator is considered to illustrate the computational aspects of the proposed methods. The computer aided tolerancing method involving clamping forces outlined in the paper is found to be effective for composite assembly.

show abstract

Section: Literature Reviewmentioning

confidence: 99%

Clamping force integrated computer aided tolerancing in composite assembly

Wang

Chen

et al. 2020

Journal of Composite Materials

View full text Add to dashboard Cite

show abstract

“…These issues are equally relevant for tidal turbine blade design and in addition, recent studies have recognised that there is a need for a greater understanding of carbon/glass fibre reinforced composite materials degradation in marine environments. Davies and co-workers at the IFREMER research institute in Brest, France, have investigated the effect of long-term cyclic loading of such materials in sea-water, involving a number of composite material manufacturers Boisseau et al, 2013 Trethewey et al (1993), Botting et al (1996), Mukherjee and Varughese (1999) and Vidyashankar and Krishna Murty (2001). Much of this work took place in the 1990's and a comprehensive review of the ply drop studies conducted during this period is provided by He et al (2000).…”

Section: Figure 2: the Structural Design Process For Tidal Turbine Blmentioning

confidence: 99%

Advanced numerical modelling techniques for the structural design of composite tidal turbine blades

Harper

Hallett

2015

Ocean Engineering

View full text Add to dashboard Cite

Abstract:Tidal Stream turbine blades must withstand both extreme one-off loads and severe fatigue loads during their 20-25 year required lifetimes in harsh marine environments. This necessitates the use of high-strength fibre reinforced composite materials to provide the required stiffness, strength and fatigue life, as well as resistance to corrosion, whilst minimising the mass of material required for blade construction and allowing its geometric form to provide the required hydrodynamic performance. Although composites provide superior performance to metals, potential failure mechanisms are more complicated and difficult to predict. A dominant failure mechanism is interfacial failure (delamination) between the composite layers (plies). This paper demonstrates how the development of numerical techniques for modelling the growth of interfacial cracks can aid the design process, allowing the effects on crack growth from potential manufacturing defects and the effect of stacking sequence of composite plies to be analysed. This can ultimately lead to reduced design safety margins and a reduction in the mass of material required for blade manufacture, essential for reducing lifecycle costs. Although the examples provided in this article are specific to tidal turbine blades, the analysis techniques are applicable to all composite structures where fatigue delamination is a primary failure concern.

show abstract

“…Due to these material and geometrical discontinuities, a tapered laminate is prone to interlaminar disbond (delamination) between these sub-laminates in the ply drop location, following earlier failure associated with the resin pocket [4,5]. A considerable amount of work has been reported in the literature on the failure mechanisms of tapered laminates under tensile loading [2][3][4][5][6][7][8][9]. As illustrated in Fig.…”

Section: Introductionmentioning

confidence: 99%