Damage tolerant topology optimization under multiple damage configurations

Snap-through buckling analyses of composite shallow spherical shells Akkas, N; Toroslu, R (1999-10-01) The purpose of this work is to present some numerical results on nonlinear, snap-through buckling of shallow spherical shells made of laminated composite materials under general static loading. Isotropic shells are covered as a special case of the general problem. A special-purpose finite-difference computer program has been developed. Moreover, the general-purpose computer program ANSYS has also been used. Effects of various material properties on the nonlinear behavior of the shells are investigated. One ...
Ring Beam Stiffness Criterion for Column-Supported Metal Silos Topkaya, Cem (American Society of Civil Engineers (ASCE), 2011-12-01) Cylindrical metal silos are commonly elevated to provide access space beneath to directly discharge the contained materials into transportation systems. Evenly spaced column supports are commonly utilized. In larger silos, the discrete forces from supports are more evenly transferred and distributed into the cylindrical shell wall by using a ring beam. A fundamental assumption in the design of the silo shell is that the meridional compressive stresses are relatively uniformly distributed around the circumfe...
Finite Element Analysis of Laminated Beams Under Transverse Loading WASTİ PAMUKSUZ, SYEDA NAZLI; Utku, Mehmet (Wiley, 2000-11-01) Laminated beams fabricated from strips with intermediate adhesive bonding layers are frequently used. The evaluation of the shear and normal stresses in the adhesive layer along the length of the beam is important and both analytical as well as experimental investigations for these stresses have been previously documented. In the present paper, an attempt has been made to compare the analytical shear stress values in the adhesive layer obtained in previous analytical work with those obtained by modelling th...
Stress intensity factor and compliance solutions for a single edge notched specimen with clamped ends Blatt, Drew; John, Reji; Çöker, Demirkan (Elsevier BV, 1994-01-01) A single edge notched geometry [SE(T)] with clamped ends is well suited for fracture toughness and fatigue crack growth testing of composites. Closed form expressions for the stress intensity factor and the compliance for an SE(T) with clamped ends were developed using finite element analysis. Using these expressions, automated crack growth tests were conducted on a monolithic Ti-1100 and a [90]8 SCS-6/Ti-24Al-l 1Nb composite. The crack growth behavior, characterized in terms of the crack growth rate versus...
Characterization of dual-phase steels using magnetic barkhausen noise technique KAPLAN, MÜCAHİT; Gür, Cemil Hakan; Erdogan, METEHAN (Springer Science and Business Media LLC, 2007-12-01) The aim of this work is to nondestructively characterize the dual phase steels using the Magnetic Barkhausen Noise (MBN) method. By quenching of AISI 8620 steel specimens having two different starting microstructures, from various intercritical annealing temperatures (ICAT) in the ferrite-austenite region, the microstructures consisting of different volume fractions of martensite with morphological variations have been obtained. The microstructures were first conventionally characterized by metallographical...

Citation Formats

M. Akgun and R. Haftka, “Damage tolerant topology optimization under multiple damage configurations,” pp. 317–325, 2000, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64768.