Damage amd Fracture Mechanics: International Conference on Computer Aided Assessment and Control of Localized Damage and Fracture Mechanics, 1998, Bologna, Italy 5th

SECTION 1: FRACTURE MECHANICS AND FRACTURE CRITERIA Crack propagation simulation in a plate with cracks and an inclusion; Thermal analysis for cracks near interfaces between piezoelectric materials; Crack line field for mode II crack under small scale yielding in an elastic-perfectly plastic solid; Analysis of interaction between interface cracks and internal cracks using singular integral equations of the body force method ; Ductile rupture at low triaxialities: influence of the inclusions upon void growth; A micro- and macro-approach to the fracture of high-strength steel notched bars. SECTION 2: DAMAGE MECHANICS Localised fatigue damage of Carrara marble; Crack-induced conditions: extended Neuber method coupled to damage mechanics; Damage mechanics analysis of a weld steel microstructure using testing and macro and micro level simulations; Augmented lagrangian variational formulation for a plastic-hardening-damage coupled model; Effects of weld-induced circumferential imperfections on the buckling of cylindrical thin-walled shells; Stochastic analysis of localised damage for short fatigue cracks; Finite element non-linear analysis of reinforced concrete beams with openings. SECTION 3: COMPOSITE MATERIALS The bridged edge crack for a fibre reinforced solid with localized damage; Application of a non-local failure criterion to a crack in heterogeneous media; Examination of the rule of mixture for effective Young modulus of composites using FEM analysis; The driving force on a crack approaching an interface of materials with different yield stresses: the effect of the interlayer thickness; On the finite element analysis of the influence of the local structural damage of the multilayered thick plate material to the stress distribution; The constraint effect and the void configuration in SiC particle reinforced aluminium alloy; Interlaminar fracture of laminates with through-thickness reinforcement; Equivalent elastic and shrinkage composite properties and some applications to hardening of tooth filling material; Evaluation of interfacial strength of plasma-spray ceramic coating films by tensile test. SECTION 4: CRACK PROPAGATION AND CONTROL Material and crack discontinuities: application of an element free augmented lagrangian method; Effect of stress ratio on the growth rate of a small crack; Cyclic fatigue crack growth characteristics for SiC whisker reinforced alumina matrix composite; Measurement of crack length and profile in thick specimens and components using modified DCPD method; Usage of continuous approach in determination of structure modification; Using novelty detection to diagnose damage in structures with time-varying parameters; Numerical methods for the strain-softening response of concrete in uniaxial compression. SECTION 5: FATIGUE Convenient stress concentration formula useful for any shape of notch in a round test specimen; Technological provision of endurance for aircraft engine compressor disks from nickel base superalloy; Fatigue life and cyclic elastic-plastic strain behaviour ahead of notch of notched specimen under cyclic plane bending; Prediction of fatigue thresholds of cracked components under mean stresses; Tribological damage of high speed rotor safety bearings - testing and simulation; Effects of extremely shallow partial notch on fatigue strength of 0.45per cent C steel. Numerical simulation of layered specimens behaviour under thermal shock conditions; Influence of local damage on the creep behaviour of high speed steels; Local plastic deformation behaviour around crack tip under cyclic loading; Stress analysis of arbitrarily distributed elliptical inclusions under longitudinal shear loading; Technological hereditary and rupture kinetics of parts from titanium alloys; Stress intensity factors for subsurface fatigue crack growth under contact loading; Fatigue properties of pre-strained structural steels; A functional approach to non-local strength conditions at multiaxial loading. SECTION 6: CREEP AND HIGH-TEMPERATURE PROBLEMS Creep-induced matrix damage in transversely loaded unidirectionally reinforced composites; Creep performance of welded structures at high temperatures; Dynamic stress intensification due to a moving heat source in a thin plate; Study on mechanical factor of grain boundary cavity nucleation under creep-fatigue condition; Deformation behaviour of polycrystalline (IN78LC) and single crystal (SC16) nickel base superalloys under creep-fatigue loading. SECTION 7: MICROSTRUCTURAL AND MICROMECHANICAL MODELLING Three dimensional structure model of damage in brittle polycrystalline materials; Brittle-elastic solids with interacting non-circular pores: stressconcentrations and microfracturing patterns; Plastic flow percolation across a microstructure with pores; The damage work model for the description of ductile failure of steel; Lacunar fractality of the contact domain in a closed rock fracture. SECTION 8: ENVIRONMENTAL EFFECTS Effect of liquid NaK on crack propagation in aluminium alloys; Brittle fracture of cracked solids as affected by surfactants; Chemical resistance of E-glass reinforced polyester composites made by pultrusion; Cell model analyses of the void behaviour under cyclic plastic holding; Influence of vacuum and water on tensile fracture behaviour of aramid fibres; Correlation between microstructure changes by water molecule corrosion and strength characteristics of ZrO2 particle dispersed Al2O3. SECTION 9: RESIDUAL STRESSES In situ monitoring of residual strains in model composites; Analysing effect of residual stresses based on crack closure model for part through fatigue crack growth problems; Influence of residual stresses on the fatigue behaviour of welded beams. SECTION 10: EXPERIMENTAL METHODS Some factors affecting the accuracy of the infrared stress analysis method; Localising a notch in a rod from changes in node positions