AN ORTHOGONAL UNIFORM/PARABOLIC SURFACE PRESSURE HALF-SPACE ELEMENT FOR THE ANALYSIS OF NON-HERTZIAN CONTACT
An orthogonal uniform/parabolic surface pressure half-space element is derived for the analysis of non-Hertzian contact. Restriction is made to parabolic variation of the surface gap in the contact in one orthogonal direction. The surface pressure is integrated analytically over the surface element to obtain influence co-efficeints, e.g. for the normal surface displacement. The coefficients are assembled into matrices leading to a linear system of equations. After solving the parabolic pressure variation is transformed to an equivalent semi-elliptic one coinciding with Hertzian line contact. Adjustments are introduced to approximate the finite size of the bodies in contact. The theoretical predictions are compared to experiments involving the non-Hertzian contact between cylinders of finite lengths.
A contact problem for the elastic quarter space
Abstract The problem of the contact between a smooth, rigid indenter and an elastic quarter space is solved using integral transform techniques. The indenter can have an arbitrary plan form and can extend to the edge of the quarter space. Numerical results are given when a rigid, right-circular body is pressed into the top surface of the quarter space, while keeping its axis parallel to the surface and perpendicular to the edge.
Therapist-case managers: more than brokers of services.
For satisfactory adjustment into the community, the long-term patient often needs assistance in dealing with a bureaucracy of agencies and departments. Some professionals have suggested establishing the role of case manager, but the case manager system is susceptible to becoming an impersonal bureaucracy itself. The author suggests that case management functions are part of the normal duties of a conscientious therapist, and that only through significant therapeutic involvement does a case manager acquire the in-depth knowledge of the patient to adequately assess his needs and facilitate the processes for meeting them. Thus the case manager should be not simply an intermediate broker of services but the patient's primary therapist. With the "therapist-case manager," the functions of therapy and case management would be combined. If therapists fail to do case management or to treat long-term patients altogether, this problem should be dealt with directly rather than simply by adding another member to the team.