金属材料断裂与应力状态参数的关系

罗德参数、软性系数和应力三维度是研究金属材料变形、破坏时常用的应力状态参数,分析从三向压缩到三向拉伸不同应力状态下各参数值的变化,得出:应力三维度值从小向大有规律地变化,罗德参数和软性系数则不能分析裂纹体、无裂纹体金属材料断裂破坏的试验结果;同时认识到构件中,体积变形较大、形状变形较小处是材料发生脆断、准脆断的断裂萌生点,此危险点正是应力三维度有较大值处。     

浅谈钢筋现浇混凝土板裂缝产生的原因和防治措施

对现浇钢筋混凝土板裂缝产生的原因进行了分析，并提出了相应的防治措施。     

封隔器在复合射孔中的应用

复合射孔中应用的封隔器有保持高能气体压力的作用,一般要考虑其有效的作用能力,确定其有效设置的距离。根据封隔器的承压技术指标,通过压力换算和冲击波衰减规律,理论上计算了在不同套管直径条件下的有效设置距离,给出了压力封隔器的有效范围,并针对102枪型、5"1/2套管和3 500 m液柱的高度,给出了环空初始压力P0与封隔器有效设置距离R的关系和初始压力对设置封隔器距离的影响。为指导封隔器的有效使用提供了理论依据。     

比较法在力学教学中的应用

本介绍了应用力学中“质点力学”与“刚体力学”之间的对应关系进行比较法教学，有利于提高教学效率和教学效果的观点。     

从材料力学与材料性能学的内涵看改称力学性能的问题

材料力学与材料性能学本无从属关系,但材料机械性能改称材料力学性能后,自然成了材料力学的一部分,同时又引起另一种相反的误解。这种关系相互混淆及其因果值得研讨。分析可知,仍定名“材料机械性能”有利于澄清这种概念性问题。     

断裂面缺损定量分析及其对连杆强度的影响

借助连杆裂解实验获得断裂接合面，利用逆向工程重构断裂面，建立带缺损的连杆模型，实现连杆断裂面缺损定量描述.探究不同尺寸、不同位置的缺损对连杆强度的影响，以此为依据制定加工中相关技术标准.通过模拟得出:随缺损尺寸增加，连杆承受的应力逐渐增加，连杆强度降低.缺损面积越大，其对连杆应力的影响越显著.同尺寸缺损当其位于接合面内部时，连杆的等效应力大于其位于接合面边缘，即内部缺损带来的危害高于边缘缺损.为保证连杆强度，缺损尺寸应满足:边缘缺损，当1.5mm＜b＜2.5mm时，a≤-1.125b+5.0875;面内缺损，当1.4mm＜b＜2.1mm时，a≤-1.143b+4.8.     

《材料力学》教学中关键问题解决方法探讨

根据学生在《材料力学》学习中最为关心的材料力学知识的重要性、材料力学知识的实用性以及如何学好材料力学等三个关键问题,文中介绍了新的课堂教学方法,旨在解除学生学习中的疑惑,梳理学习思路,端正学习态度,提高学习积极性和主动性。文中提出的教学方法在教学过程中已逐步实施,效果很好。     

The quantitative content of statistical mechanics

I give a brief account of the way in which thermodynamics and statistical mechanics actually work as contemporary scientific theories, and in particular of what statistical mechanics contributes to thermodynamics over and above any supposed underpinning of the latter׳s general principles. In doing so, I attempt to illustrate that statistical mechanics should not be thought of wholly or even primarily as itself a foundational project for thermodynamics, and that conceiving of it this way potentially distorts the foundational study of statistical mechanics itself.     

Interpretation neutrality in the classical domain of quantum theory

I show explicitly how concerns about wave function collapse and ontology can be decoupled from the bulk of technical analysis necessary to recover localized, approximately Newtonian trajectories from quantum theory. In doing so, I demonstrate that the account of classical behavior provided by decoherence theory can be straightforwardly tailored to give accounts of classical behavior on multiple interpretations of quantum theory, including the Everett, de Broglie–Bohm and GRW interpretations. I further show that this interpretation-neutral, decoherence-based account conforms to a general view of inter-theoretic reduction in physics that I have elaborated elsewhere, which differs from the oversimplified picture that treats reduction as a matter of simply taking limits. This interpretation-neutral account rests on a general three-pronged strategy for reduction between quantum and classical theories that combines decoherence, an appropriate form of Ehrenfest׳s Theorem, and a decoherence-compatible mechanism for collapse. It also incorporates a novel argument as to why branch-relative trajectories should be approximately Newtonian, which is based on a little-discussed extension of Ehrenfest׳s Theorem to open systems, rather than on the more commonly cited but less germane closed-systems version. In the Conclusion, I briefly suggest how the strategy for quantum-classical reduction described here might be extended to reduction between other classical and quantum theories, including classical and quantum field theory and classical and quantum gravity.