Influence Of Joint Thickness Research Articles

Influence of joint thickness on Type IV cracking behaviour of modified 9Cr-1Mo steel weld joint

ABSTRACTEffect of joint thickness on Type IV cracking behaviour of modified 9Cr-1Mo steel weld joint has been investigated. Creep tests on multi-pass double-V cross weld joint flat specimens of the steel having thicknesses in the range 1–17 mm have been carried out at 923 K (650°C) and 50 MPa stress. Creep rupture life of the weld joint was found to increase with thickness and reached a maximum value around 10 mm of thickness followed by decrease with further increase in thickness. Failure in the weld joints occurred in the soft intercritical region of the heat-affected zone (HAZ). Creep strain localisation was observed at the fractured location and was more in the thinner weld joints than in the thicker weld joint. Creep cavitation in the intercritical region of HAZ close to the unaffected base metal was more extensive at the mid-location of the weld pass, where the HAZ width was relatively larger and hardness was lowest. The type IV cavitation in intercritical HAZ was more extensive in thicker joint, whereas creep strain concentration in the intercritical HAZ was more in thinner weld joint. Creep cavitation in the joint was more pronounced at near mid-thickness locations than those beneath the specimen surface. Joints of intermediate thickness possessed higher creep rupture life because of relatively less accumulation of creep deformation coupled with lower creep cavitation in the intercritical region of HAZ.

Finite elements analysis of the vibrational response of an adhesively bonded beam

This paper presents a finite element analysis to determine the influence of geometrical properties of adhesive joints on the vibrational response of a metallic beam doubly supported on adhesive joints. This research is based on a previous experimental analysis in which it was concluded that larger experiments or numerical simulations are necessary in order to separate and investigate the influence of length, thickness and material of the adhesive joint. The finite element model is previously validated using experimental results for the transient response, mode shapes and transmissibility functions. Then, for the study, the model of the beam is seismically excited and the influence of joint thickness, overlapping length and adhesive properties on the beam motion is analyzed using the root mean square value of twenty-one transmissibility functions obtained from across the length of the beam. The study analyses resonance frequencies, peak amplitudes, and modal loss factors.

Experimental analysis of the vibrational response of an adhesively bonded beam

This paper presents an experimental procedure for studying the influence that geometrical properties of adhesive joints have on the vibrational response of a metallic beam doubly supported on adhesive joints. A test bench has been developed for the experimental program. This procedure begins experimentally identifying the modal shapes. The beams are seismically excited and the influence of joint thickness and overlapping length on the beam motion is analyzed using the root mean square value of twenty-one transmissibility functions obtained along the length of the beam. The study is performed on resonance frequencies, peak amplitudes, and modal loss factors.

Influence of Joint Thickness and Mortar-Block Elastic Properties on the Strength and Stresses Developed in Soil-Cement Block Masonry

Soil-cement blocks are employed for load bearing masonry buildings. This paper deals with the study on the influence of bed joint thickness and elastic properties of the soil-cement blocks, and the mortar on the strength and behavior of soil-cement block masonry prisms. Influence of joint thickness on compressive strength has been examined through an experimental program. The nature of stresses developed and their distribution, in the block and the mortar of the soil-cement block masonry prism under compression, has been analyzed by an elastic analysis using FEM. Influence of various parameters like joint thickness, ratio of block to mortar modulus, and Poisson’s ratio of the block and the mortar are considered in FEM analysis. Some of the major conclusions of the study are: (1) masonry compressive strength is sensitive to the ratio of modulus of block to that of the mortar ( Eb / Em ) and masonry compressive strength decreases as the mortar joint thickness is increased for the case where the ratio of blo...

421 三層接合体の熱残留応力特異場に対する接合体厚さの影響(OS3-1 圧電応力,熱応力の特異性の解析と実験,OS3 圧電応力,熱応力の特異性の解析と実験)

421 三層接合体の熱残留応力特異場に対する接合体厚さの影響(OS3-1 圧電応力,熱応力の特異性の解析と実験,OS3 圧電応力,熱応力の特異性の解析と実験)