Plastic collapse of pipe bends under combined internal pressure and in-plane bending

Plastic collapse of pipe bends with attached straight pipes under combined internal pressure and in-plane closing moment is investigated by elastic–plastic finite element analysis. Three load histories are investigated, proportional loading, sequential pressure–moment loading and sequential moment–pressure loading. Three categories of ductile failure load are defined: limit load, plastic load (with associated criteria of collapse) and instability loads. The results show that theoretical limit analysis is not conservative for all the load combinations considered. The calculated plastic load is dependent on the plastic collapse criteria used. The plastic instability load gives an objective measure of failure and accounts for the effects of large deformations. The proportional and pressure–moment load cases exhibit significant geometric strengthening, whereas the moment–pressure load case exhibits significant geometric weakening

Journaling as a Social-Emotional Teaching Practice to Promote Adolescent Mental Health

Given the current state of education in the United States, there has been an influx in the number of adolescents diagnosed with a mental illness or have experienced struggles with their mental health. Because of this, Social-Emotional Learning (SEL) strategies have been introduced further into adolescent education to bolster the skills students learned in their youths. To assist in the promotion of the five SEL competencies, different journaling strategies can be introduced to impact adolescent mental health positively and continue to practice SEL for life beyond high school. The purpose of this research is to introduce these strategies to pre-service teachers so that they can be taught across contents for the betterment of the American youth. A professional development session was held for pre-service teachers at Bowling Green State University to discuss journaling methods and how they can be effectively used in 7-12 classrooms

Response to Shayah and Coatesworth

Full assessment of snoring should involve general and local factors which contribute to the patient's complaint, such as any history of apnoea attacks, high body mass index, reflux, smoking, alcohol consumption, uvulasize and laxity of soft palate, collar size and base of tongue. The paper did not clearly identify the potential importance of these factors

A plastic load criterion for inelastic design by analysis

The allowable plastic load in pressure vessel design by analysis is determined by applying a graphical construction to a characteristic load-deformation plot of the collapse behavior of the vessel. This paper presents an alternative approach to the problem. The plastic response is characterized by considering the curvature of a plot of plastic work dissipated in the vessel against the applied load. It is proposed that salient points of curvature correspond to critical stages in the evolution of the gross plastic deformation mechanism. In the proposed plastic work curvature (PWC) criterion of plastic collapse, the plastic load is defined as the load corresponding to zero or minimal plastic work curvature after yielding and the formation of plastic mechanisms have occurred. Application of the proposed criterion is illustrated by considering the elastic-plastic response of a simple cantilever beam in bending and a complex three-dimensional finite element analysis of a nozzle intersection. The results show that the proposed approach gives higher values of plastic load than alternative criteria when the material exhibits strain hardening. It is proposed that this is because the PWC criterion more fully represents the constraining effect of material strain hardening on the spread of plastic deformation

Suggestive course of study in English for first year junior high school pupils

Thesis (M.A.)--Boston University, 1931. This item was digitized by the Internet Archive

Suggestive course of study in English for first year junior high school pupils

Thesis (M.A.)--Boston University, 1931. This item was digitized by the Internet Archive

Evaluating plastic loads in torispherical heads using a new criterion of collapse

In ASME Design by Analysis, the plastic load of pressure vessels is established using the Twice Elastic Slope criterion of plastic collapse. This is based on a characteristic load-deformation plot obtained by inelastic analysis. This study investigates an alternative plastic criteria based on plastic work dissipation where the ratio of plastic to total work is monitored. Two sample analyses of medium thickness torispherical pressure vessels are presented. Elastic-perfectly plastic and strain hardening material models are considered in both small and large deformation analyses. The calculated plastic loads are assessed in comparison with experimental results from the literature

Banned Books Awareness

The first week of October each year is known as Banned Books Week. It is a time to bring awareness to the impact of banned books and to look at what has changed since the year prior. The American Library Association has reported that 2,571 individual titles were challenged in the year 2022, which is a 38% increase in challenges from 2021. The largest group of challengers are parents, followed by patrons and political parties. The two most targeted locations for banning books are public and school libraries. In the United States, Texas was the state with the highest number of challenged titles for the year 2022. From January 1 to August 31 of 2023, the American Library Association has seen a 20% increase in challenges when compared to the same reporting period from 2022. The increase is also seen in the running total of challenged titles. From the initial reporting period, 3,923 titles have been challenged this year. In 2022, the total for the entire year was only 2,571 titles. Texas is still the state with the highest number of challenged books this year