Finite element analysis and optimization of multi-layer combined ultrahigh pressure cylinder
The finite element model was established by the finite element method of Workbench. The prestressed state and the working state of the multi-layer composite cylinder was used to calculate by the finite element method. The general distribution law of the stress of the multi-layer cylinder is obtained, and the equivalent stress distribution is not uniform. At the same time theoretically based on the elastic limit of multilayer composite cylinder unified solution, and the optimization condition is determined. The design of multi-layer ultrahigh pressure cylinder is optimized. The results show that the nonuniformity of the stress distribution of the cylinder can be improved greatly. The study can provide technical support for the structural design and optimization of the multi-layer ultrahigh pressure cylinder.
Fracture strain of gun steel for ultra-high-pressure vessels considering triaxiality effect
To better understand the local failure of ultra-high-pressure vessels, the ductile fracture behavior of a gun steel, PCrNi3MoVA used for ultra-high-pressure vessel in China, was studied through experimental and numerical investigations. Tests on smooth and notched specimens of different notch radius values were performed, and the stress–strain states of specimens in the loading history were obtained through finite element analysis. Fracture was identified by means of comparing the engineering stress versus the strain obtained from tests with the finite element analysis results. The effect of triaxiality on the ductile fracture behavior of PCrNi3MoVA was discussed. Finally, a new plastic design-by-analysis method considering triaxiality effect was proposed to protect against local failure of ultra-high-pressure vessels.
Professional support in rural New South Wales: perceptions of new graduate occupational therapists.
OBJECTIVE
To explore the experiences of professional support among new graduates working in rural New South Wales, including the current availability of professional support and the impact of support levels on professional practice.


DESIGN
Qualitative, using semistructured face-to-face or telephone interviews.


SETTING
New graduate occupational therapists employed in public and private hospitals and community health services in rural New South Wales.


SUBJECTS
Nine new graduate occupational therapists within their first year of practice.


MAIN OUTCOME
A description of participant experiences of professional support and strategies to enhance the recruitment and retention of occupational therapists in rural areas.


RESULTS
Participants reported varied experiences of professional support and emphasised the importance of having access to a wide variety of resources. Participants highlighted that professional support could assist in developing independence and other skills. However, ultimately a lack of support resulted in decreased confidence and subsequent decreased job satisfaction among participants.


CONCLUSIONS
The findings suggest that greater effort should be directed to ensuring that all new graduates have access to professional support, including structured supervision, and that strategies be explored and adopted to ensure that this occurs.